ELECTRICITY CONNECTION
CONSTRUCTION GUIDE
Technical Guidelines and Safety Information for
Customers, House Builders and Developers
Version 2.2 June 2020
1
Omagh Depot
T: 028 8225 3290
E: [email protected]
COLERAINE
BALLYCLARE
Disclaimer
Disclaimer
Although care has been taken in the compilation and preparation of this document, NIE Networks respectfully accepts
no responsibility for any errors, omissions or alterations or for any consequences arising from the use, or reliance upon
the information in this document.
Dargan Depot (Belfast)
T: 028 9095 4795
E: [email protected]
Craigavon Depot
T: 028 3836 8579
E: [email protected]
Figure 1: NIE Networks Depot Map for Construction Works
Ballymena Depot
T: 028 2566 3258
E: [email protected]
1
COLERAINE
DUNGANNON
ENNISKILLEN
COLERAINE
BALLYMENA
CAMPSIE
OMAGH
DUNGANNON
ENNISKILLEN
CRAIGAVON
NEWRY
BELFAST
BALLYCLARE
BANGOR
DOWNPATRICK
Campsie Depot
T: 028 7186 4676
E: [email protected]
2
Introduction
At Northern Ireland Electricity Networks (NIE Networks), we’ve been connecting customers to the
electricity network for over a century. We know that today’s customer, large and small, wants a
simple, value for money, streamlined process and that’s what we aim to deliver, every time.
We ensure we’re delivering what our customers want, now and into the future. Whether you need an
electricity supply for a new home or business premise, or if you are expanding your manufacturing
capability, we will guide you through the process from quotation right through to getting your supply
metered and energised.
This booklet will provide you with information and guidance on how to prepare your site when the job
has moved to the construction stage. There is relevant information that should be passed to your civil
and electrical contractors on how to prepare the site for the installation of mains and service cable.
This includes the submission of a connection card(s) and registering with a supplier to enable the
installation of the meter(s).
To schedule work you can call or email the relevant Construction Department listed below.
2
Dargan Depot (Belfast)
T: 028 9095 4795
E: [email protected]
Ballymena Depot
T: 028 2566 3258
E: [email protected]
Craigavon Depot
T: 028 3836 8579
E: [email protected]
Please note:
Every effort will be made to meet your requirements. However, we require a minimum of 10 working days notice
to lay mains and service cable in private ground (statutory notice periods are required for public property).
The above timescale is a guide only and lead times may be longer during busy periods. Longer lead times may
be required depending on the notice period required by Department of Infrastructure (DfI).
Omagh Depot
T: 028 8225 3290
E: [email protected]
Campsie Depot
T: 028 7186 4676
E: [email protected]
3
What are the next steps to progress my job?
After the letter of acceptance and payment (if required) are received and provided all necessary
consents have been secured, our Connections Customer Liaison team will contact you to determine
when you will be ready for works to commence.
Once a date has been agreed, you are responsible for the following steps including giving relevant
information to your civil/electrical contractors working on your behalf.
The key steps are:
If you are not sure of what is required we can arrange for a site visit to advise you or your contractor of
your requirements. Please contact the relevant NIE Networks depot listed on Page 1.
After your job has been constructed and made live, you may receive a courtesy call or email from our
Customer Liaison team, who will ensure you are happy with all works completed. We would welcome
your feedback and may ask you to complete a survey to help us improve our service.
Civil works and other facilitating worksCivil works and other facilitating works
Please prepare your site by digging your own trenches as outlined in your offer. The timescale for
trench preparation should be agreed with NIE Networks. Ensure the meter cubicle or meter board
is in position – see Page 4. Ensure any tree cutting, stream crossings and other relevant works
are completed in advance of our teams starting construction as per guidance on our website.
Connection card
Connection card
On completion of your electrical works, your electrician will complete and sign a connection card
which must be returned to us before your supply can be energised. You will recieve a connection
card with the quotation letter or you can download a copy at
nienetworks.co.uk/Connections/Connection-cards
Register with your chosen supplier
Register with your chosen supplier
Quote the Meter Point Reference Number (MPRN) supplied on your letter of Terms &
Conditions. Suppliers available in Northern Ireland can be found on the Consumer Council
website consumercouncil.org.uk
For new connections, your connection card and supplier registration do not need to be complete
For new connections, your connection card and supplier registration do not need to be complete
before construction work takes place, but these do need to be carried out before the meter will
before construction work takes place, but these do need to be carried out before the meter will
be fitted.
be fitted.
For alterations or increased load, your connection card and supplier registration needs completed
For alterations or increased load, your connection card and supplier registration needs completed
at least five working days before construction commences to facilitate the meter change.
at least five working days before construction commences to facilitate the meter change.
Installation of meter
Installation of meter
Once we have completed on site construction and all documentation has been received, we will
contact you to arrange an appointment to complete the installation of your meter. Further details
can be found on Page 9. You can contact Metering by calling 028 2566 1640 or email
MeteringServices[email protected].uk
1.
2.
3.
4.
3
Please prepare your site by digging your own trenches as outlined in your offer and as per the
requirements outlined on page 5. The timescale for trench preparation should be agreed with NIE
Networks. Ensure the meter cubicle or meter board is in position – see Page 4. Ensure any tree
cutting, stream crossings and other relevant works are completed in advance of our teams starting
construction as per guidance on our website.
What are the next steps to progress my job?
After the letter of acceptance and payment (if required) are received and provided all necessary
consents have been secured, our Connections Customer Liaison team will contact you to determine
when you will be ready for works to commence.
Once a date has been agreed, you are responsible for the following steps including giving relevant
information to your civil/electrical contractors working on your behalf.
The key steps are:
If you are not sure of what is required we can arrange for a site visit to advise you or your contractor of
your requirements. Please contact the relevant NIE Networks depot listed on Page 1.
After your job has been constructed and made live, you may receive a courtesy call or email from our
Customer Liaison team, who will ensure you are happy with all works completed. We would welcome
your feedback and may ask you to complete a survey to help us improve our service.
Civil works and other facilitating works
Civil works and other facilitating works
Please prepare your site by digging your own trenches as outlined in your offer. The timescale for
trench preparation should be agreed with NIE Networks. Ensure the meter cubicle or meter board
is in position – see Page 4. Ensure any tree cutting, stream crossings and other relevant works
are completed in advance of our teams starting construction as per guidance on our website.
Connection cardConnection card
On completion of your electrical works, your electrician will complete and sign a connection card
which must be returned to us before your supply can be energised. You will recieve a connection
card with the quotation letter or you can download a copy at
nienetworks.co.uk/Connections/Connection-cards
Register with your chosen supplierRegister with your chosen supplier
Quote the Meter Point Reference Number (MPRN) supplied on your letter of Terms &
Conditions. Suppliers available in Northern Ireland can be found on the Consumer Council
website consumercouncil.org.uk
For new connections, your connection card and supplier registration do not need to be complete For new connections, your connection card and supplier registration do not need to be complete
before construction work takes place, but these do need to be carried out before the meter will before construction work takes place, but these do need to be carried out before the meter will
be fitted.be fitted.
For alterations or increased load, your connection card and supplier registration needs completed For alterations or increased load, your connection card and supplier registration needs completed
at least five working days before construction commences to facilitate the meter change.at least five working days before construction commences to facilitate the meter change.
Installation of meterInstallation of meter
Once we have completed on site construction and all documentation has been received, we will
contact you to arrange an appointment to complete the installation of your meter. Further details
can be found on Page 9. You can contact Metering by calling 028 2566 1640 or email
MeteringServices[email protected].uk
1.
2.
3.
4.
3
What are the next steps to progress my job?
After the letter of acceptance and payment (if required) are received and provided all necessary
consents have been secured, our Connections Customer Liaison team will contact you to determine
when you will be ready for works to commence.
Once a date has been agreed, you are responsible for the following steps including giving relevant
information to your civil/electrical contractors working on your behalf.
The key steps are:
If you are not sure of what is required we can arrange for a site visit to advise you or your contractor of
your requirements. Please contact the relevant NIE Networks depot listed on Page 1.
After your job has been constructed and made live, you may receive a courtesy call or email from our
Customer Liaison team, who will ensure you are happy with all works completed. We would welcome
your feedback and may ask you to complete a survey to help us improve our service.
Civil works and other facilitating worksCivil works and other facilitating works
Please prepare your site by digging your own trenches as outlined in your offer. The timescale for
trench preparation should be agreed with NIE Networks. Ensure the meter cubicle or meter board
is in position – see Page 4. Ensure any tree cutting, stream crossings and other relevant works
are completed in advance of our teams starting construction as per guidance on our website.
Connection cardConnection card
On completion of your electrical works, your electrician will complete and sign a connection card
which must be returned to us before your supply can be energised. You will recieve a connection
card with the quotation letter or you can download a copy at
nienetworks.co.uk/Connections/Connection-cards
Register with your chosen supplierRegister with your chosen supplier
Quote the Meter Point Reference Number (MPRN) supplied on your letter of Terms &
Conditions. Suppliers available in Northern Ireland can be found on the Consumer Council
website consumercouncil.org.uk
For new connections, your connection card and supplier registration do not need to be complete For new connections, your connection card and supplier registration do not need to be complete
before construction work takes place, but these do need to be carried out before the meter will before construction work takes place, but these do need to be carried out before the meter will
be fitted.be fitted.
For alterations or increased load, your connection card and supplier registration needs completed For alterations or increased load, your connection card and supplier registration needs completed
at least five working days before construction commences to facilitate the meter change.at least five working days before construction commences to facilitate the meter change.
Installation of meterInstallation of meter
Once we have completed on site construction and all documentation has been received, we will
contact you to arrange an appointment to complete the installation of your meter. Further details
can be found on Page 9. You can contact Metering by calling 028 2566 1640 or email
MeteringServices.Connections@nienetworks.co.uk
1.
2.
3.
4.
3
For alterations or increased load, your connection card needs completed at least five working
days before construction commences to facilitate the meter change.
4
The diagram below shows the different parts of a standard domestic electricity installation.
SERVICE CABLE - this is the cable which connects your property to the local mains. It will either go
under the ground to our mains cable, or will be clipped to your house and go overhead to one of our
poles. The service cable duct should extend 50mm into the meter box to allow a seal to be completed
on the cable entry duct.
CUTOUT - this is NIE Networks’ main fuse and needs to be below the meter on the left hand side.
METER TAILS - these are your cables and connect the meter to your installation. As the cables are
yours, you need to ask your electrical contractor to include them in the scope of their works. Your
meter tails should be double insulated, correctly colour coded and sized, and less than two metres
long. If they are more than two metres then a fused isolator is required on the meter board. If they
are more than three metres then earth fault protection is required.
CONSUMER UNIT - this contains the fuses or trip switches which control the circuits in your house,
probably lights, sockets, cooker and immersion heater. This is your property and again, needs to be
managed by your electrical contractor.
If you intend to install a keypad (prepayment) meter, now or at any point in the future, then it is
advisable to install a data cable from the meter box to your preferred location for the freedom unit
(remote keypad connected to meter).
diagram
4
METER
METER BOX/BOARD
METER TAILS
CUTOUT
SERVICE CABLE IN DUCT (WALL CAVITY)
CONSUMER UNIT
EARTH TO BE SUPPLIED AS AGREED WITH NIE NETWORKS
Figure 2: Standard domestic electricity installation
DUCT SEAL
5
Civil Works
Individual / Developer Responsibilities
In good (ploughable) agricultural land, the cable trench should be 950mm deep. The trenches must be
provided with a minimum of 50mm fine compacted bedding/blinding material at the bottom. In road crossings, 2
red ducts 150mm apart, shall be laid in a 1000mm deep trench and shall have a cement bound granular mixture
surround. Cross section drawings for cable trench requirements can be provided at your request. In all instances
ducts should be red, solid walled and clearly marked “ELECTRICITY”. For more information on ducting and cable
well requirements – please refer to your terms and conditions.
If you are carrying out the civil works on your private land (or public land with consent), then you are responsible
for the provision of all cable trenching, including joint holes and the provision of fine compacted bedding, backfill-
ing and reinstatement at your expense. The depth and width of the cable trench must be:
5
CROSS-SECTION VIEW THROUGH CABLE TRENCHCROSS-SECTION VIEW THROUGH CABLE TRENCH
CABLE IN FOOTPATHCABLE IN FOOTPATH
2000 mm 2000 mm footpath
550 mm
550 mm
Marker TapeMarker Tape
Finished Footpath LevelFinished Footpath Level
240mm240mm
450 mm450 mm
(minimum)
Electric
Electric
Marker tapeMarker tape
32/38 mm32/38 mm
Black or Black or
Red duct Red duct
EXCAVATION FOR MAINSEXCAVATION FOR MAINS
Top of cableTop of cable
ne compacted ne compacted
bedding/blinding bedding/blinding
material (min 50mm material (min 50mm
deep) deep)
400 mm400 mm
ElectricElectric
service cableservice cable
Minimum recommended Minimum recommended
distance to other utilitiesdistance to other utilities
300mm300mm
ne compacted ne compacted
bedding/blinding bedding/blinding
materialmaterial
(min 50mm deep)(min 50mm deep)
Trench bottom to be level and Trench bottom to be level and
compacted with nal surface free compacted with nal surface free
from any material (bricks, concrete, from any material (bricks, concrete,
rubble, naturally occurring rock rubble, naturally occurring rock
etc) Likely to cause damage to the etc) Likely to cause damage to the
installed cable.installed cable.
Ground to be within Ground to be within
+ or - 150 mm of the + or - 150 mm of the
nished levelnished level
Road Kerb and Road Kerb and
footpath edging line footpath edging line
and level xedand level xed
Minimum of 1m working Minimum of 1m working
space to the excavationspace to the excavation
Excavated materialExcavated material
Cable type Number of cables
Service
LV mains
LV mains
HV (11kV)
HV (11kV)
HV & LV
HV & LV
Trench width (longitudinal
roads/carriageways)
Trench depth (longitudinal
roads/carriageways)
Trench width (in other
areas eg footway)
Trench depth (in other
areas eg footway)
1
1
2
1
2
One of each - LV
staggered above HV
Two of each - LV
staggered above HV
400mm
500mm
400mm
400mm
600mm
450mm
650mm
850mm
850mm
850mm
850mm
850mm
1000mm
1000mm
400mm
500mm
400mm
150mm
600mm
450mm
650mm
750mm
550mm
550mm
550mm
750mm
HV at 750mm, dusted to
lay LV at 550mm
HV at 750mm, dusted to
lay LV at 550mm
550 mm550 mm
50 mm50 mm
150 mm150 mm
50 mm50 mm
Figure 3: Excavation diagrams for mains and service cables
If you are carrying out the civil works on your private land (or public land with consent), then you are
responsible for the provision of all cable trenching, ducting, sandbags and blocks, including joint holes
and the provision of fine compacted bedding, backfilling and reinstatement at your expense. Excavation
shall not take place within 300mm of NIE Networks live cables or 1000mm from structures. More
details are provided in Policy 5/009.
Civil Works
Individual / Developer Responsibilities
In good (ploughable) agricultural land, the cable trench should be 950mm deep. The trenches must be
provided with a minimum of 50mm fine compacted bedding/blinding material at the bottom. In road crossings, 2
red ducts 150mm apart, shall be laid in a 1000mm deep trench and shall have a cement bound granular mixture
surround. Cross section drawings for cable trench requirements can be provided at your request. In all instances
ducts should be red, solid walled and clearly marked “ELECTRICITY”. For more information on ducting and cable
well requirements – please refer to your terms and conditions.
If you are carrying out the civil works on your private land (or public land with consent), then you are responsible
for the provision of all cable trenching, including joint holes and the provision of fine compacted bedding, backfill-
ing and reinstatement at your expense. The depth and width of the cable trench must be:
5
CROSS-SECTION VIEW THROUGH CABLE TRENCHCROSS-SECTION VIEW THROUGH CABLE TRENCH
CABLE IN FOOTPATHCABLE IN FOOTPATH
2000 mm 2000 mm footpath
550 mm
550 mm
Marker TapeMarker Tape
Finished Footpath LevelFinished Footpath Level
240mm240mm
450 mm450 mm
(minimum)
Electric
Electric
Marker tapeMarker tape
32/38 mm32/38 mm
Black or Black or
Red duct Red duct
EXCAVATION FOR MAINSEXCAVATION FOR MAINS
Top of cableTop of cable
ne compacted ne compacted
bedding/blinding bedding/blinding
material (min 50mm material (min 50mm
deep) deep)
400 mm400 mm
ElectricElectric
service cableservice cable
Minimum recommended Minimum recommended
distance to other utilitiesdistance to other utilities
300mm300mm
ne compacted ne compacted
bedding/blinding bedding/blinding
materialmaterial
(min 50mm deep)(min 50mm deep)
Trench bottom to be level and Trench bottom to be level and
compacted with nal surface free compacted with nal surface free
from any material (bricks, concrete, from any material (bricks, concrete,
rubble, naturally occurring rock rubble, naturally occurring rock
etc) Likely to cause damage to the etc) Likely to cause damage to the
installed cable.installed cable.
Ground to be within Ground to be within
+ or - 150 mm of the + or - 150 mm of the
nished levelnished level
Road Kerb and Road Kerb and
footpath edging line footpath edging line
and level xedand level xed
Minimum of 1m working Minimum of 1m working
space to the excavationspace to the excavation
Excavated materialExcavated material
Cable type Number of cables
Service
LV mains
LV mains
HV (11kV)
HV (11kV)
HV & LV
HV & LV
Trench width (longitudinal
roads/carriageways)
Trench depth (longitudinal
roads/carriageways)
Trench width (in other
areas eg footway)
Trench depth (in other
areas eg footway)
1
1
2
1
2
One of each - LV
staggered above HV
Two of each - LV
staggered above HV
400mm
500mm
400mm
400mm
600mm
450mm
650mm
850mm
850mm
850mm
850mm
850mm
1000mm
1000mm
400mm
500mm
400mm
150mm
600mm
450mm
650mm
750mm
550mm
550mm
550mm
750mm
HV at 750mm, dusted to
lay LV at 550mm
HV at 750mm, dusted to
lay LV at 550mm
550 mm550 mm
50 mm50 mm
150 mm150 mm
50 mm50 mm
Figure 3: Excavation diagrams for mains and service cables
Where two LV mains or HV cables are located in the same trench, they must be separated by 300mm,
centre to centre. LV service cables shall be separated by 100mm centre to centre.
In good agricultural land, the cable trench shall be 1100mm deep. All trenches must be provided with a
minimum of 50mm fine compacted bedding/blinding material at the bottom.
In road crossings, two red ducts 150mm apart, shall be laid in a 1000mm deep trench with cement
bound granular mixture surround. Cross section drawings for cable trench requirements can be
provided at your request.
Ducts should be defined as detailed in the glossary. In all instances, they shall be of rigid construction
and be single walled. For more information on ducting and cable well requirements – please refer to
your terms and conditions.
Civil Works
Individual / Developer Responsibilities
In good (ploughable) agricultural land, the cable trench should be 950mm deep. The trenches must be
provided with a minimum of 50mm fine compacted bedding/blinding material at the bottom. In road crossings, 2
red ducts 150mm apart, shall be laid in a 1000mm deep trench and shall have a cement bound granular mixture
surround. Cross section drawings for cable trench requirements can be provided at your request. In all instances
ducts should be red, solid walled and clearly marked “ELECTRICITY”. For more information on ducting and cable
well requirements – please refer to your terms and conditions.
If you are carrying out the civil works on your private land (or public land with consent), then you are responsible
for the provision of all cable trenching, including joint holes and the provision of fine compacted bedding, backfill-
ing and reinstatement at your expense. The depth and width of the cable trench must be:
5
CROSS-SECTION VIEW THROUGH CABLE TRENCH
CROSS-SECTION VIEW THROUGH CABLE TRENCH
CABLE IN FOOTPATH
CABLE IN FOOTPATH
2000 mm
2000 mm
footpath
550 mm
550 mm
Marker Tape
Marker Tape
Finished Footpath Level
Finished Footpath Level
240mm
240mm
450 mm
450 mm
(minimum)
Electric
Electric
Marker tape
Marker tape
32/38 mm
32/38 mm
Black or
Black or
Red duct
Red duct
EXCAVATION FOR MAINS
EXCAVATION FOR MAINS
Top of cable
Top of cable
ne compacted
ne compacted
bedding/blinding
bedding/blinding
material (min 50mm
material (min 50mm
deep)
deep)
400 mm
400 mm
Electric
Electric
service cable
service cable
Minimum recommended
Minimum recommended
distance to other utilities
distance to other utilities
300mm
300mm
ne compacted
ne compacted
bedding/blinding
bedding/blinding
material
material
(min 50mm deep)
(min 50mm deep)
Trench bottom to be level and
Trench bottom to be level and
compacted with nal surface free
compacted with nal surface free
from any material (bricks, concrete,
from any material (bricks, concrete,
rubble, naturally occurring rock
rubble, naturally occurring rock
etc) Likely to cause damage to the
etc) Likely to cause damage to the
installed cable.
installed cable.
Ground to be within
Ground to be within
+ or - 150 mm of the
+ or - 150 mm of the
nished level
nished level
Road Kerb and
Road Kerb and
footpath edging line
footpath edging line
and level xed
and level xed
Minimum of 1m working
Minimum of 1m working
space to the excavation
space to the excavation
Excavated material
Excavated material
Cable type Number of cables
Service
LV mains
LV mains
HV (11kV)
HV (11kV)
HV & LV
HV & LV
Trench width (longitudinal
roads/carriageways)
Trench depth (longitudinal
roads/carriageways)
Trench width (in other
areas eg footway)
Trench depth (in other
areas eg footway)
1
1
2
1
2
One of each - LV
staggered above HV
Two of each - LV
staggered above HV
400mm
500mm
400mm
400mm
600mm
450mm
650mm
850mm
850mm
850mm
850mm
850mm
1000mm
1000mm
400mm
500mm
400mm
150mm
600mm
450mm
650mm
750mm
550mm
550mm
550mm
750mm
HV at 750mm, dusted to
lay LV at 550mm
HV at 750mm, dusted to
lay LV at 550mm
550 mm
550 mm
50 mm
50 mm
150 mm
150 mm
50 mm
50 mm
Figure 3: Excavation diagrams for mains and service cables
Civil Works
Individual / Developer Responsibilities
In good (ploughable) agricultural land, the cable trench should be 950mm deep. The trenches must be
provided with a minimum of 50mm fine compacted bedding/blinding material at the bottom. In road crossings, 2
red ducts 150mm apart, shall be laid in a 1000mm deep trench and shall have a cement bound granular mixture
surround. Cross section drawings for cable trench requirements can be provided at your request. In all instances
ducts should be red, solid walled and clearly marked “ELECTRICITY”. For more information on ducting and cable
well requirements – please refer to your terms and conditions.
If you are carrying out the civil works on your private land (or public land with consent), then you are responsible
for the provision of all cable trenching, including joint holes and the provision of fine compacted bedding, backfill-
ing and reinstatement at your expense. The depth and width of the cable trench must be:
5
CROSS-SECTION VIEW THROUGH CABLE TRENCHCROSS-SECTION VIEW THROUGH CABLE TRENCH
CABLE IN FOOTPATHCABLE IN FOOTPATH
2000 mm 2000 mm footpath
550 mm
550 mm
Marker TapeMarker Tape
Finished Footpath LevelFinished Footpath Level
240mm240mm
450 mm450 mm
(minimum)
Electric
Electric
Marker tapeMarker tape
32/38 mm32/38 mm
Black or Black or
Red duct Red duct
EXCAVATION FOR MAINSEXCAVATION FOR MAINS
Top of cableTop of cable
ne compacted ne compacted
bedding/blinding bedding/blinding
material (min 50mm material (min 50mm
deep) deep)
400 mm400 mm
ElectricElectric
service cableservice cable
Minimum recommended Minimum recommended
distance to other utilitiesdistance to other utilities
300mm300mm
ne compacted ne compacted
bedding/blinding bedding/blinding
materialmaterial
(min 50mm deep)(min 50mm deep)
Trench bottom to be level and Trench bottom to be level and
compacted with nal surface free compacted with nal surface free
from any material (bricks, concrete, from any material (bricks, concrete,
rubble, naturally occurring rock rubble, naturally occurring rock
etc) Likely to cause damage to the etc) Likely to cause damage to the
installed cable.installed cable.
Ground to be within Ground to be within
+ or - 150 mm of the + or - 150 mm of the
nished levelnished level
Road Kerb and Road Kerb and
footpath edging line footpath edging line
and level xedand level xed
Minimum of 1m working Minimum of 1m working
space to the excavationspace to the excavation
Excavated materialExcavated material
Cable type Number of cables
Service
LV mains
LV mains
HV (11kV)
HV (11kV)
HV & LV
HV & LV
Trench width (longitudinal
roads/carriageways)
Trench depth (longitudinal
roads/carriageways)
Trench width (in other
areas eg footway)
Trench depth (in other
areas eg footway)
1
1
2
1
2
One of each - LV
staggered above HV
Two of each - LV
staggered above HV
400mm
500mm
400mm
400mm
600mm
450mm
650mm
850mm
850mm
850mm
850mm
850mm
1000mm
1000mm
400mm
500mm
400mm
150mm
600mm
450mm
650mm
750mm
550mm
550mm
550mm
750mm
HV at 750mm, dusted to
lay LV at 550mm
HV at 750mm, dusted to
lay LV at 550mm
550 mm550 mm
50 mm50 mm
150 mm150 mm
50 mm50 mm
Figure 3: Excavation diagrams for mains and service cables
Civil Works
Individual / Developer Responsibilities
In good (ploughable) agricultural land, the cable trench should be 950mm deep. The trenches must be
provided with a minimum of 50mm fine compacted bedding/blinding material at the bottom. In road crossings, 2
red ducts 150mm apart, shall be laid in a 1000mm deep trench and shall have a cement bound granular mixture
surround. Cross section drawings for cable trench requirements can be provided at your request. In all instances
ducts should be red, solid walled and clearly marked “ELECTRICITY”. For more information on ducting and cable
well requirements – please refer to your terms and conditions.
If you are carrying out the civil works on your private land (or public land with consent), then you are responsible
for the provision of all cable trenching, including joint holes and the provision of fine compacted bedding, backfill-
ing and reinstatement at your expense. The depth and width of the cable trench must be:
5
CROSS-SECTION VIEW THROUGH CABLE TRENCHCROSS-SECTION VIEW THROUGH CABLE TRENCH
CABLE IN FOOTPATHCABLE IN FOOTPATH
2000 mm 2000 mm footpath
550 mm
550 mm
Marker TapeMarker Tape
Finished Footpath LevelFinished Footpath Level
240mm240mm
450 mm450 mm
(minimum)
Electric
Electric
Marker tapeMarker tape
32/38 mm32/38 mm
Black or Black or
Red duct Red duct
EXCAVATION FOR MAINSEXCAVATION FOR MAINS
Top of cableTop of cable
ne compacted ne compacted
bedding/blinding bedding/blinding
material (min 50mm material (min 50mm
deep) deep)
400 mm400 mm
ElectricElectric
service cableservice cable
Minimum recommended Minimum recommended
distance to other utilitiesdistance to other utilities
300mm300mm
ne compacted ne compacted
bedding/blinding bedding/blinding
materialmaterial
(min 50mm deep)(min 50mm deep)
Trench bottom to be level and Trench bottom to be level and
compacted with nal surface free compacted with nal surface free
from any material (bricks, concrete, from any material (bricks, concrete,
rubble, naturally occurring rock rubble, naturally occurring rock
etc) Likely to cause damage to the etc) Likely to cause damage to the
installed cable.installed cable.
Ground to be within Ground to be within
+ or - 150 mm of the + or - 150 mm of the
nished levelnished level
Road Kerb and Road Kerb and
footpath edging line footpath edging line
and level xedand level xed
Minimum of 1m working Minimum of 1m working
space to the excavationspace to the excavation
Excavated materialExcavated material
Cable type Number of cables
Service
LV mains
LV mains
HV (11kV)
HV (11kV)
HV & LV
HV & LV
Trench width (longitudinal
roads/carriageways)
Trench depth (longitudinal
roads/carriageways)
Trench width (in other
areas eg footway)
Trench depth (in other
areas eg footway)
1
1
2
1
2
One of each - LV
staggered above HV
Two of each - LV
staggered above HV
400mm
500mm
400mm
400mm
600mm
450mm
650mm
850mm
850mm
850mm
850mm
850mm
1000mm
1000mm
400mm
500mm
400mm
150mm
600mm
450mm
650mm
750mm
550mm
550mm
550mm
750mm
HV at 750mm, dusted to
lay LV at 550mm
HV at 750mm, dusted to
lay LV at 550mm
550 mm550 mm
50 mm50 mm
150 mm150 mm
50 mm50 mm
Figure 3: Excavation diagrams for mains and service cables
Civil Works
Individual / Developer Responsibilities
In good (ploughable) agricultural land, the cable trench should be 950mm deep. The trenches must be
provided with a minimum of 50mm fine compacted bedding/blinding material at the bottom. In road crossings, 2
red ducts 150mm apart, shall be laid in a 1000mm deep trench and shall have a cement bound granular mixture
surround. Cross section drawings for cable trench requirements can be provided at your request. In all instances
ducts should be red, solid walled and clearly marked “ELECTRICITY”. For more information on ducting and cable
well requirements – please refer to your terms and conditions.
If you are carrying out the civil works on your private land (or public land with consent), then you are responsible
for the provision of all cable trenching, including joint holes and the provision of fine compacted bedding, backfill-
ing and reinstatement at your expense. The depth and width of the cable trench must be:
5
CROSS-SECTION VIEW THROUGH CABLE TRENCHCROSS-SECTION VIEW THROUGH CABLE TRENCH
CABLE IN FOOTPATHCABLE IN FOOTPATH
2000 mm 2000 mm footpath
550 mm
550 mm
Marker TapeMarker Tape
Finished Footpath LevelFinished Footpath Level
240mm240mm
450 mm450 mm
(minimum)
Electric
Electric
Marker tapeMarker tape
32/38 mm32/38 mm
Black or Black or
Red duct Red duct
EXCAVATION FOR MAINSEXCAVATION FOR MAINS
Top of cableTop of cable
ne compacted ne compacted
bedding/blinding bedding/blinding
material (min 50mm material (min 50mm
deep) deep)
400 mm400 mm
ElectricElectric
service cableservice cable
Minimum recommended Minimum recommended
distance to other utilitiesdistance to other utilities
300mm300mm
ne compacted ne compacted
bedding/blinding bedding/blinding
materialmaterial
(min 50mm deep)(min 50mm deep)
Trench bottom to be level and Trench bottom to be level and
compacted with nal surface free compacted with nal surface free
from any material (bricks, concrete, from any material (bricks, concrete,
rubble, naturally occurring rock rubble, naturally occurring rock
etc) Likely to cause damage to the etc) Likely to cause damage to the
installed cable.installed cable.
Ground to be within Ground to be within
+ or - 150 mm of the + or - 150 mm of the
nished levelnished level
Road Kerb and Road Kerb and
footpath edging line footpath edging line
and level xedand level xed
Minimum of 1m working Minimum of 1m working
space to the excavationspace to the excavation
Excavated materialExcavated material
Cable type Number of cables
Service
LV mains
LV mains
HV (11kV)
HV (11kV)
HV & LV
HV & LV
Trench width (longitudinal
roads/carriageways)
Trench depth (longitudinal
roads/carriageways)
Trench width (in other
areas eg footway)
Trench depth (in other
areas eg footway)
1
1
2
1
2
One of each - LV
staggered above HV
Two of each - LV
staggered above HV
400mm
500mm
400mm
400mm
600mm
450mm
650mm
850mm
850mm
850mm
850mm
850mm
1000mm
1000mm
400mm
500mm
400mm
150mm
600mm
450mm
650mm
750mm
550mm
550mm
550mm
750mm
HV at 750mm, dusted to
lay LV at 550mm
HV at 750mm, dusted to
lay LV at 550mm
550 mm550 mm
50 mm50 mm
150 mm150 mm
50 mm50 mm
Figure 3: Excavation diagrams for mains and service cables
Civil Works
Individual / Developer Responsibilities
In good (ploughable) agricultural land, the cable trench should be 950mm deep. The trenches must be
provided with a minimum of 50mm fine compacted bedding/blinding material at the bottom. In road crossings, 2
red ducts 150mm apart, shall be laid in a 1000mm deep trench and shall have a cement bound granular mixture
surround. Cross section drawings for cable trench requirements can be provided at your request. In all instances
ducts should be red, solid walled and clearly marked “ELECTRICITY”. For more information on ducting and cable
well requirements – please refer to your terms and conditions.
If you are carrying out the civil works on your private land (or public land with consent), then you are responsible
for the provision of all cable trenching, including joint holes and the provision of fine compacted bedding, backfill-
ing and reinstatement at your expense. The depth and width of the cable trench must be:
5
CROSS-SECTION VIEW THROUGH CABLE TRENCHCROSS-SECTION VIEW THROUGH CABLE TRENCH
CABLE IN FOOTPATHCABLE IN FOOTPATH
2000 mm 2000 mm footpath
550 mm
550 mm
Marker TapeMarker Tape
Finished Footpath LevelFinished Footpath Level
240mm240mm
450 mm450 mm
(minimum)
Electric
Electric
Marker tapeMarker tape
32/38 mm32/38 mm
Black or Black or
Red duct Red duct
EXCAVATION FOR MAINSEXCAVATION FOR MAINS
Top of cableTop of cable
ne compacted ne compacted
bedding/blinding bedding/blinding
material (min 50mm material (min 50mm
deep) deep)
400 mm400 mm
ElectricElectric
service cableservice cable
Minimum recommended Minimum recommended
distance to other utilitiesdistance to other utilities
300mm300mm
ne compacted ne compacted
bedding/blinding bedding/blinding
materialmaterial
(min 50mm deep)(min 50mm deep)
Trench bottom to be level and Trench bottom to be level and
compacted with nal surface free compacted with nal surface free
from any material (bricks, concrete, from any material (bricks, concrete,
rubble, naturally occurring rock rubble, naturally occurring rock
etc) Likely to cause damage to the etc) Likely to cause damage to the
installed cable.installed cable.
Ground to be within Ground to be within
+ or - 150 mm of the + or - 150 mm of the
nished levelnished level
Road Kerb and Road Kerb and
footpath edging line footpath edging line
and level xedand level xed
Minimum of 1m working Minimum of 1m working
space to the excavationspace to the excavation
Excavated materialExcavated material
Cable type Number of cables
Service
LV mains
LV mains
HV (11kV)
HV (11kV)
HV & LV
HV & LV
Trench width (longitudinal
roads/carriageways)
Trench depth (longitudinal
roads/carriageways)
Trench width (in other
areas eg footway)
Trench depth (in other
areas eg footway)
1
1
2
1
2
One of each - LV
staggered above HV
Two of each - LV
staggered above HV
400mm
500mm
400mm
400mm
600mm
450mm
650mm
850mm
850mm
850mm
850mm
850mm
1000mm
1000mm
400mm
500mm
400mm
150mm
600mm
450mm
650mm
750mm
550mm
550mm
550mm
750mm
HV at 750mm, dusted to
lay LV at 550mm
HV at 750mm, dusted to
lay LV at 550mm
550 mm550 mm
50 mm50 mm
150 mm150 mm
50 mm50 mm
Figure 3: Excavation diagrams for mains and service cables
Civil Works
Individual / Developer Responsibilities
In good (ploughable) agricultural land, the cable trench should be 950mm deep. The trenches must be
provided with a minimum of 50mm fine compacted bedding/blinding material at the bottom. In road crossings, 2
red ducts 150mm apart, shall be laid in a 1000mm deep trench and shall have a cement bound granular mixture
surround. Cross section drawings for cable trench requirements can be provided at your request. In all instances
ducts should be red, solid walled and clearly marked “ELECTRICITY”. For more information on ducting and cable
well requirements – please refer to your terms and conditions.
If you are carrying out the civil works on your private land (or public land with consent), then you are responsible
for the provision of all cable trenching, including joint holes and the provision of fine compacted bedding, backfill-
ing and reinstatement at your expense. The depth and width of the cable trench must be:
5
CROSS-SECTION VIEW THROUGH CABLE TRENCHCROSS-SECTION VIEW THROUGH CABLE TRENCH
CABLE IN FOOTPATHCABLE IN FOOTPATH
2000 mm 2000 mm footpath
550 mm
550 mm
Marker TapeMarker Tape
Finished Footpath LevelFinished Footpath Level
240mm240mm
450 mm450 mm
(minimum)
Electric
Electric
Marker tapeMarker tape
32/38 mm32/38 mm
Black or Black or
Red duct Red duct
EXCAVATION FOR MAINSEXCAVATION FOR MAINS
Top of cableTop of cable
ne compacted ne compacted
bedding/blinding bedding/blinding
material (min 50mm material (min 50mm
deep) deep)
400 mm400 mm
ElectricElectric
service cableservice cable
Minimum recommended Minimum recommended
distance to other utilitiesdistance to other utilities
300mm300mm
ne compacted ne compacted
bedding/blinding bedding/blinding
materialmaterial
(min 50mm deep)(min 50mm deep)
Trench bottom to be level and Trench bottom to be level and
compacted with nal surface free compacted with nal surface free
from any material (bricks, concrete, from any material (bricks, concrete,
rubble, naturally occurring rock rubble, naturally occurring rock
etc) Likely to cause damage to the etc) Likely to cause damage to the
installed cable.installed cable.
Ground to be within Ground to be within
+ or - 150 mm of the + or - 150 mm of the
nished levelnished level
Road Kerb and Road Kerb and
footpath edging line footpath edging line
and level xedand level xed
Minimum of 1m working Minimum of 1m working
space to the excavationspace to the excavation
Excavated materialExcavated material
Cable type Number of cables
Service
LV mains
LV mains
HV (11kV)
HV (11kV)
HV & LV
HV & LV
Trench width (longitudinal
roads/carriageways)
Trench depth (longitudinal
roads/carriageways)
Trench width (in other
areas eg footway)
Trench depth (in other
areas eg footway)
1
1
2
1
2
One of each - LV
staggered above HV
Two of each - LV
staggered above HV
400mm
500mm
400mm
400mm
600mm
450mm
650mm
850mm
850mm
850mm
850mm
850mm
1000mm
1000mm
400mm
500mm
400mm
150mm
600mm
450mm
650mm
750mm
550mm
550mm
550mm
750mm
HV at 750mm, dusted to
lay LV at 550mm
HV at 750mm, dusted to
lay LV at 550mm
550 mm550 mm
50 mm50 mm
150 mm150 mm
50 mm50 mm
Figure 3: Excavation diagrams for mains and service cables
Civil Works
Individual / Developer Responsibilities
In good (ploughable) agricultural land, the cable trench should be 950mm deep. The trenches must be
provided with a minimum of 50mm fine compacted bedding/blinding material at the bottom. In road crossings, 2
red ducts 150mm apart, shall be laid in a 1000mm deep trench and shall have a cement bound granular mixture
surround. Cross section drawings for cable trench requirements can be provided at your request. In all instances
ducts should be red, solid walled and clearly marked “ELECTRICITY”. For more information on ducting and cable
well requirements – please refer to your terms and conditions.
If you are carrying out the civil works on your private land (or public land with consent), then you are responsible
for the provision of all cable trenching, including joint holes and the provision of fine compacted bedding, backfill-
ing and reinstatement at your expense. The depth and width of the cable trench must be:
5
CROSS-SECTION VIEW THROUGH CABLE TRENCHCROSS-SECTION VIEW THROUGH CABLE TRENCH
CABLE IN FOOTPATHCABLE IN FOOTPATH
2000 mm 2000 mm footpath
550 mm
550 mm
Marker TapeMarker Tape
Finished Footpath LevelFinished Footpath Level
240mm240mm
450 mm450 mm
(minimum)
Electric
Electric
Marker tapeMarker tape
32/38 mm32/38 mm
Black or Black or
Red duct Red duct
EXCAVATION FOR MAINSEXCAVATION FOR MAINS
Top of cableTop of cable
ne compacted ne compacted
bedding/blinding bedding/blinding
material (min 50mm material (min 50mm
deep) deep)
400 mm400 mm
ElectricElectric
service cableservice cable
Minimum recommended Minimum recommended
distance to other utilitiesdistance to other utilities
300mm300mm
ne compacted ne compacted
bedding/blinding bedding/blinding
materialmaterial
(min 50mm deep)(min 50mm deep)
Trench bottom to be level and Trench bottom to be level and
compacted with nal surface free compacted with nal surface free
from any material (bricks, concrete, from any material (bricks, concrete,
rubble, naturally occurring rock rubble, naturally occurring rock
etc) Likely to cause damage to the etc) Likely to cause damage to the
installed cable.installed cable.
Ground to be within Ground to be within
+ or - 150 mm of the + or - 150 mm of the
nished levelnished level
Road Kerb and Road Kerb and
footpath edging line footpath edging line
and level xedand level xed
Minimum of 1m working Minimum of 1m working
space to the excavationspace to the excavation
Excavated materialExcavated material
Cable type Number of cables
Service
LV mains
LV mains
HV (11kV)
HV (11kV)
HV & LV
HV & LV
Trench width (longitudinal
roads/carriageways)
Trench depth (longitudinal
roads/carriageways)
Trench width (in other
areas eg footway)
Trench depth (in other
areas eg footway)
1
1
2
1
2
One of each - LV
staggered above HV
Two of each - LV
staggered above HV
400mm
500mm
400mm
400mm
600mm
450mm
650mm
850mm
850mm
850mm
850mm
850mm
1000mm
1000mm
400mm
500mm
400mm
150mm
600mm
450mm
650mm
750mm
550mm
550mm
550mm
750mm
HV at 750mm, dusted to
lay LV at 550mm
HV at 750mm, dusted to
lay LV at 550mm
550 mm550 mm
50 mm50 mm
150 mm150 mm
50 mm50 mm
Figure 3: Excavation diagrams for mains and service cables
6
Install appropriate rigid walled ducting, as per your terms and conditions, as defined in the
glossary.
Carry out all necessary excavation and reinstatement work to allow cables to be laid. The trench should
be kept as smooth as possible, with 50mm of fine compacted bedding/blinding material at the bottom.
Install appropriate solid walled red ducting.
Ensure site is free of all obstacles including scaffolding and site traffic.
Please avoid digging trenches too early to avoid tripping or trench collapsing. Agree timescales with
NIE Networks.
Individual/Developer to agree a schedule of works with NIE Networks and a site visit may be
arranged prior to starting works to discuss how work will proceed.
All kerb lines must be fully formed with levels in place prior to NIE Networks commencing any work.
Gas and water have to be installed prior to any cable laying by NIE Networks. It is recommended
that no other utility should be installed over or within 300mm of the electricity cables.
Preferred method of cable laying is open trenching.
When a connection is required in public property, we will schedule works in accordance with
appropriate bodies and landowners.
Red UPVC ducts 160mm/150mm, marked “Danger Electricity” and solid walled on both sides are
to be used for mains cables in public property.
A caution tape/tile must be laid on top of the dust of the cables. This will be done by our contractor
unless otherwise agreed with you. It is important the marker is positioned correctly as it acts as a
safety warning to anyone carrying out subsequent excavations. Therefore, it must not be moved
after its positioning by our contractor. Bedding and surround to cables must be fine compacted
quarry dust or sand.
If you are carrying out excavation and reinstatement, trench backfilling must be undertaken immedi-
ately after cable laying has been completed. It is your responsibility (or your contractor’s) to source
the correct amount and type of dust. This can be obtained from a local quarry. Typically, one tonne
of dust is required for every 5 metres of track. This should be left in piles along the track at 1 metre
intervals.
Mains Cable
Cable Laying
Figure 4: Location and depth of electricity mains
with recommended distance from gas and water
6
300mm 300mm (minimum)
WATER MAIN
300mm 300mm (minimum distance to other utilities)
GAS MAIN
ELECTRICITY MAIN
Granular materialGranular material
Boundary wallBoundary wall
Fine compacted Fine compacted
bedding/blinding bedding/blinding
materialmaterial
Marker TapeMarker Tape
Carry out all necessary excavation and reinstatement work to allow cables to be laid. The trench should
be kept as smooth as possible, with 50mm of fine compacted bedding/blinding material at the bottom.
Install appropriate solid walled red ducting.
Ensure site is free of all obstacles including scaffolding and site traffic.
Please avoid digging trenches too early to avoid tripping or trench collapsing. Agree timescales with
NIE Networks.
Individual/Developer to agree a schedule of works with NIE Networks and a site visit may be
arranged prior to starting works to discuss how work will proceed.
All kerb lines must be fully formed with levels in place prior to NIE Networks commencing any work.
Gas and water have to be installed prior to any cable laying by NIE Networks. It is recommended
that no other utility should be installed over or within 300mm of the electricity cables.
Preferred method of cable laying is open trenching.
When a connection is required in public property, we will schedule works in accordance with
appropriate bodies and landowners.
Red UPVC ducts 160mm/150mm, marked “Danger Electricity” and solid walled on both sides are
to be used for mains cables in public property.
A caution tape/tile must be laid on top of the dust of the cables. This will be done by our contractor
unless otherwise agreed with you. It is important the marker is positioned correctly as it acts as a
safety warning to anyone carrying out subsequent excavations. Therefore, it must not be moved
after its positioning by our contractor. Bedding and surround to cables must be fine compacted
quarry dust or sand.
If you are carrying out excavation and reinstatement, trench backfilling must be undertaken immedi-
ately after cable laying has been completed. It is your responsibility (or your contractor’s) to source
the correct amount and type of dust. This can be obtained from a local quarry. Typically, one tonne
of dust is required for every 5 metres of track. This should be left in piles along the track at 1 metre
intervals.
Mains Cable
Cable Laying
Figure 4: Location and depth of electricity mains
with recommended distance from gas and water
6
300mm 300mm (minimum)
WATER MAIN
300mm 300mm (minimum distance to other utilities)
GAS MAIN
ELECTRICITY MAIN
Granular materialGranular material
Boundary wallBoundary wall
Fine compacted Fine compacted
bedding/blinding bedding/blinding
materialmaterial
Marker TapeMarker Tape
Carry out all necessary excavation and reinstatement work to allow cables to be laid. The trench should
be kept as smooth as possible, with 50mm of fine compacted bedding/blinding material at the bottom.
Install appropriate solid walled red ducting.
Ensure site is free of all obstacles including scaffolding and site traffic.
Please avoid digging trenches too early to avoid tripping or trench collapsing. Agree timescales with
NIE Networks.
Individual/Developer to agree a schedule of works with NIE Networks and a site visit may be
arranged prior to starting works to discuss how work will proceed.
All kerb lines must be fully formed with levels in place prior to NIE Networks commencing any work.
Gas and water have to be installed prior to any cable laying by NIE Networks. It is recommended
that no other utility should be installed over or within 300mm of the electricity cables.
Preferred method of cable laying is open trenching.
When a connection is required in public property, we will schedule works in accordance with
appropriate bodies and landowners.
Red UPVC ducts 160mm/150mm, marked “Danger Electricity” and solid walled on both sides are
to be used for mains cables in public property.
A caution tape/tile must be laid on top of the dust of the cables. This will be done by our contractor
unless otherwise agreed with you. It is important the marker is positioned correctly as it acts as a
safety warning to anyone carrying out subsequent excavations. Therefore, it must not be moved
after its positioning by our contractor. Bedding and surround to cables must be fine compacted
quarry dust or sand.
If you are carrying out excavation and reinstatement, trench backfilling must be undertaken immedi-
ately after cable laying has been completed. It is your responsibility (or your contractor’s) to source
the correct amount and type of dust. This can be obtained from a local quarry. Typically, one tonne
of dust is required for every 5 metres of track. This should be left in piles along the track at 1 metre
intervals.
Mains Cable
Cable Laying
Figure 4: Location and depth of electricity mains
with recommended distance from gas and water
6
300mm
300mm
(minimum)
WATER MAIN
300mm
300mm
(minimum distance to other utilities)
GAS MAIN
ELECTRICITY MAIN
Granular material
Granular material
Boundary wall
Boundary wall
Fine compacted
Fine compacted
bedding/blinding
bedding/blinding
material
material
Marker Tape
Marker Tape
A caution tape/tile must be laid on top of the dust of the cables. This will be done by NIE Networks’
contractor or the ICP. It is important the marker is positioned correctly as it acts as a safety warning
to anyone carrying out subsequent excavations. Therefore, it must not be moved after its positioning
by NIE Networks’ contractor. Bedding and surround to cables must be fine compacted quarry dust or
sand.
Gas and water mains have to be installed prior to any cable laying by NIE Networks. It is
recommended that no other utility should be installed over or within 300mm of the electricity cables
This must be left in piles along the track at 1 metre
Meter box to be installed by you within fixed/permanent structure. Ensure doors are lockable and
watertight – this must meet NIE Networks requirements as stated in your terms and conditions.
Meter box location must be installed in a location approved by NIE Networks’ planning department.
Where agreed electricity cables must be ducted from the meter position to the connection point on
the mains cable in the footway. Ducting must be red and clearly marked “ELECTRICITY” as
specified in your terms and conditions.
Ducting must be situated 300mm away from other service pipes.
Joint holes must be 300mm deeper than the cable trench depths stated on Page 5. Width and
length of joint holes must be: High Voltage (HV): 1000mm wide x 3000mm long.
Low Voltage (LV): 1000mm wide x 2000mm long.
Service Cable
7
Cable type Number of cables
Service
Trench width (longitudi-
nal roads/carriageways)
Trench depth (longitudi-
nal roads/carriageways)
Trench width (in other
areas eg footway)
Trench depth (in other
areas eg footway)
1-2 400mm
850mm
150mm
550mm
Hockey Stick duct
(red)
inside cavity per cable
Service Duct
Electricity
Joint
Electricity
Service cable
550mm
Minimum Depth
Figure 5: Duct and service cable arrangements to meter box
7
Meter box to be installed by you within fixed/permanent structure. Ensure doors are lockable and
watertight – this must meet NIE Networks requirements as stated in your terms and conditions.
Meter box location must be installed in a location approved by NIE Networks’ planning department.
Where agreed electricity cables must be ducted from the meter position to the connection point on
the mains cable in the footway. Ducting must be red and clearly marked “ELECTRICITY” as
specified in your terms and conditions.
Ducting must be situated 300mm away from other service pipes.
Joint holes must be 300mm deeper than the cable trench depths stated on Page 5. Width and
length of joint holes must be: High Voltage (HV): 1000mm wide x 3000mm long.
Low Voltage (LV): 1000mm wide x 2000mm long.
Service Cable
7
Cable type Number of cables
Service
Trench width (longitudi-
nal roads/carriageways)
Trench depth (longitudi-
nal roads/carriageways)
Trench width (in other
areas eg footway)
Trench depth (in other
areas eg footway)
1-2 400mm
850mm
150mm
550mm
Hockey Stick duct
(red)
inside cavity per cable
Service Duct
Electricity
Joint
Electricity
Service cable
550mm
Minimum Depth
Figure 5: Duct and service cable arrangements to meter box
Where agreed, electricity cables may be ducted from the meter position to the connection point on
the mains cable in the footway. Ducting must be as specified in your terms and conditions and NIE
Networks’ specification 201-12.
Cables laid direct or in ducting must be situated 300mm away from other service pipes.
Joint holes must be 300mm deeper than the cable trench depths stated on Page 5. The width
and length of joint holes for plastic sheathed cables must be: High Voltage (HV): 1000mm wide
by 3000mm long. Low Voltage (LV): 1000mm wide by 2000mm long. For PILC type cables, the
dimensions are 1500mm wide by 3000mm long
Meter box to be installed by you within fixed/permanent structure. Ensure doors are lockable and
watertight – this must meet NIE Networks requirements as stated in your terms and conditions.
Meter box location must be installed in a location approved by NIE Networks’ planning department.
Where agreed electricity cables must be ducted from the meter position to the connection point on
the mains cable in the footway. Ducting must be red and clearly marked “ELECTRICITY” as
specified in your terms and conditions.
Ducting must be situated 300mm away from other service pipes.
Joint holes must be 300mm deeper than the cable trench depths stated on Page 5. Width and
length of joint holes must be: High Voltage (HV): 1000mm wide x 3000mm long.
Low Voltage (LV): 1000mm wide x 2000mm long.
Service Cable
7
Cable type Number of cables
Service
Trench width (longitudi-
nal roads/carriageways)
Trench depth (longitudi-
nal roads/carriageways)
Trench width (in other
areas eg footway)
Trench depth (in other
areas eg footway)
1-2 400mm
850mm
150mm
550mm
Hockey Stick duct
(red)
inside cavity per cable
Service Duct
Electricity
Joint
Electricity
Service cable
550mm
Minimum Depth
Figure 5: Duct and service cable arrangements to meter box
8
2000mm
Carriageway
B
o
u
n
d
a
r
y
450
Electricity Depth HV 450mm - 1200mm / LV 450mm
295
Cable TV / Communications Depth 250mm - 350mm
295
Gas
Depth
600mm
270
Water Depth 750mm
260
430
Telecommunications Depth
350mm
B
o
u
n
d
a
r
y
450
295
295
270
260
430
S
u
r
f
a
c
e
HV cable
Cable TypeCable Type
Service cable
LV Mains cable
Trench depth in FootwayTrench depth in Footway
550mm
550mm
750mm
Trench depth in Carriageway (longitudinal)Trench depth in Carriageway (longitudinal)
850mm
850mm
850mm
Recommended positioning of all utility apparatus
8
Figure 6: NJUG (Streetworks UK) diagram of recommended postitioning of utility apparatus in a two
meter footway
The diagram below provides general recommended positioning of all utilities. However, NIE Networks’
specific depths are detailed below, in particular HV cables should be buried at a minimum of 750mm. In
good (ploughable) agricultural land, the cable trench should be 950mm deep. In road crossings, 2 red
cable ducts should be laid in a 1000mm deep trench.
NIE Networks cable positioning depths requirements
Electricity depth - see Table 3
2000mm
Carriageway
B
o
u
n
d
a
r
y
450
Electricity Depth HV 450mm - 1200mm / LV 450mm
295
Cable TV / Communications Depth 250mm - 350mm
295
Gas
Depth
600mm
270
Water Depth 750mm
260
430
Telecommunications Depth
350mm
B
o
u
n
d
a
r
y
450
295
295
270
260
430
S
u
r
f
a
c
e
HV cable
Cable Type
Cable Type
Service cable
LV Mains cable
Trench depth in Footway
Trench depth in Footway
550mm
550mm
750mm
Trench depth in Carriageway (longitudinal)
Trench depth in Carriageway (longitudinal)
850mm
850mm
850mm
Recommended positioning of all utility apparatus
8
Figure 6: NJUG (Streetworks UK) diagram of recommended postitioning of utility apparatus in a two
meter footway
The diagram below provides general recommended positioning of all utilities. However, NIE Networks’
specific depths are detailed below, in particular HV cables should be buried at a minimum of 750mm. In
good (ploughable) agricultural land, the cable trench should be 950mm deep. In road crossings, 2 red
cable ducts should be laid in a 1000mm deep trench.
NIE Networks cable positioning depths requirements
Electricity depth - see Table 3
The diagram below provides general recommended positioning of all utilities in accordance with NJUG.
2000mm
Carriageway
B
o
u
n
d
a
r
y
450
Electricity Depth HV 450mm - 1200mm / LV 450mm
295
Cable TV / Communications Depth 250mm - 350mm
295
Gas
Depth
600mm
270
Water Depth 750mm
260
430
Telecommunications Depth
350mm
B
o
u
n
d
a
r
y
450
295
295
270
260
430
S
u
r
f
a
c
e
HV cable
Cable TypeCable Type
Service cable
LV Mains cable
Trench depth in FootwayTrench depth in Footway
550mm
550mm
750mm
Trench depth in Carriageway (longitudinal)Trench depth in Carriageway (longitudinal)
850mm
850mm
850mm
Recommended positioning of all utility apparatus
8
Figure 6: NJUG (Streetworks UK) diagram of recommended postitioning of utility apparatus in a two
meter footway
The diagram below provides general recommended positioning of all utilities. However, NIE Networks’
specific depths are detailed below, in particular HV cables should be buried at a minimum of 750mm. In
good (ploughable) agricultural land, the cable trench should be 950mm deep. In road crossings, 2 red
cable ducts should be laid in a 1000mm deep trench.
NIE Networks cable positioning depths requirements
Electricity depth - see Table 3
For clarity, NIE Networks’ specific depths are detailed in the following table. In particular HV cables
should be buried at a minimum of 750mm. In good agricultural land that is likely to be ploughed, the cable
trench should be 1100mm deep. In road crossings, two red cable ducts should be laid in a 1000mm
deep trench.
9
The location of the metering position must be agreed with NIE Networks. We will not be able to connect
unacceptable metering positions. External meter cabinets should be used to house NIE Networks
metering equipment in domestic premises unless alternative arrangements have been agreed.
Properly positioned meter cabinets facilitate regular meter readings, minimise inconvenience to
customers and allow for the electricity supply to the property to be disconnected in the event of a
house fire or other emergency situation.
Location and Installation of Metering Cabinet
Your meter box should be fitted on the external side of a wall where it is accessible from the front
of the property and is unlikely to be damaged.
Cabinets are available from builders’ suppliers and must be secured in position and door catches
should be self locking.
A PVC cable entry duct should be installed for each service cable. The duct should be 32mm or
38mm red, and must enter the cubicle on the bottom left hand side and extend into the cubicle a
minimum of 50mm to allow for sealing.
The bottom edge of the cubicle should be installed to be within 900mm to 1050mm from finished
ground level.
Your sub mains cable must exit via the bottom right hand side of the meter cubicle.
Where an outdoor metering arrangement cannot be facilitated, please put your request in writing. We
will then consider an alternative position to site the mains fuse and install metering equipment indoors.
9
Figure 7: Meter arrangements for surface
mounted meter cabinet if recessed is not
available
Customer Meter
Conductors
900-1050mm900-1050mm
600x400x210600x400x210
Single PhaseSingle Phase
600x600x270600x600x270
Three PhaseThree Phase
Cable Guard
supplied by
NIE Networks
Meter cubicle
Manufactured to
ESI standard
High impact
3mm thick PVC
cable guard
Ground Level
A PVC cable entry duct should be installed for each service cable. This is normally of hockey stick
construction. The duct should be 32mm or 38mm diameter, red, it must enter the cubicle on the bottom
left hand side and extend into the cubicle a minimum of 50mm to allow for sealing.
Height
Single Phase
Width
Depth
Box Dimensions
400mm
210mm
600mm
Box Dimensions
600mm
270mm
600mm
Three Phase
Height
Width
Depth
Location and Installation of Metering Cabinet
10
Figure 8: Meter box arrangements for recessed meter cabinet
550
550
900-1050mm
900-1050mm
Ground Level
Red duct
Damp proof
Membrane (DPM)
38/32mm
red duct
Customer Meter
Conductors
600x400x210
600x400x210
Single Phase
Single Phase
600x600x270
600x600x270
Three Phase
Three Phase
Chamfer
Meter cubicle
Manufactured to
ESI standard
Meter cubicle
Manufactured to
ESI standard
All NIE Networks ducts and cables should enter the left hand side of the meter cubicle. Internal meter
board positions may be agreed at the planning stage.
To arrange the installation of your meter, please call 028 2566 1640 or email
To arrange the installation of your meter, please call 028 2566 1640 or email
MeteringServices[email protected].ukMeteringServices.Connections@nienetworks.co.uk
Height
Single Phase
Width
Depth
Box Dimensions
400mm
210mm
600mm
Box Dimensions
600mm
270mm
600mm
Three Phase
Height
Width
Depth
Location and Installation of Metering Cabinet
10
Figure 8: Meter box arrangements for recessed meter cabinet
550
550
900-1050mm900-1050mm
Ground Level
Red duct
Damp proof
Membrane (DPM)
38/32mm
red duct
Customer Meter
Conductors
600x400x210600x400x210
Single PhaseSingle Phase
600x600x270600x600x270
Three PhaseThree Phase
Chamfer
Meter cubicle
Manufactured to
ESI standard
Meter cubicle
Manufactured to
ESI standard
All NIE Networks ducts and cables should enter the left hand side of the meter cubicle. Internal meter
board positions may be agreed at the planning stage.
To arrange the installation of your meter, please call 028 2566 1640 or email
To arrange the installation of your meter, please call 028 2566 1640 or email
MeteringServices.Connections@nienetworks.co.ukMeteringServices.Connections@nienetworks.co.uk
Figure 7: Meter box arrangements for recessed meter cabinet
10
Height
Single Phase
Width
Depth
Box Dimensions
400mm
210mm
600mm
Box Dimensions
600mm
270mm
600mm
Three Phase
Height
Width
Depth
Location and Installation of Metering Cabinet
10
Figure 8: Meter box arrangements for recessed meter cabinet
550550
900-1050mm900-1050mm
Ground Level
Red duct
Damp proof
Membrane (DPM)
38/32mm
red duct
Customer Meter
Conductors
600x400x210600x400x210
Single PhaseSingle Phase
600x600x270600x600x270
Three PhaseThree Phase
Chamfer
Meter cubicle
Manufactured to
ESI standard
Meter cubicle
Manufactured to
ESI standard
All NIE Networks ducts and cables should enter the left hand side of the meter cubicle. Internal meter
board positions may be agreed at the planning stage.
To arrange the installation of your meter, please call 028 2566 1640 or email
To arrange the installation of your meter, please call 028 2566 1640 or email
MeteringServices[email protected].uk
MeteringServices.Connections@nienetworks.co.uk
Box Dimensions Single Phase Three Phase
(mm)
Width 400 600
Depth 210 270
Height 600 600
The location of the metering position must be agreed with NIE Networks. We will not be able to connect
unacceptable metering positions. External meter cabinets should be used to house NIE Networks
metering equipment in domestic premises unless alternative arrangements have been agreed.
Properly positioned meter cabinets facilitate regular meter readings, minimise inconvenience to
customers and allow for the electricity supply to the property to be disconnected in the event of a
house fire or other emergency situation.
Location and Installation of Metering Cabinet
Your meter box should be fitted on the external side of a wall where it is accessible from the front
of the property and is unlikely to be damaged.
Cabinets are available from builders’ suppliers and must be secured in position and door catches
should be self locking.
A PVC cable entry duct should be installed for each service cable. The duct should be 32mm or
38mm red, and must enter the cubicle on the bottom left hand side and extend into the cubicle a
minimum of 50mm to allow for sealing.
The bottom edge of the cubicle should be installed to be within 900mm to 1050mm from finished
ground level.
Your sub mains cable must exit via the bottom right hand side of the meter cubicle.
Where an outdoor metering arrangement cannot be facilitated, please put your request in writing. We
will then consider an alternative position to site the mains fuse and install metering equipment indoors.
9
Figure 7: Meter arrangements for surface
mounted meter cabinet if recessed is not
available
Customer Meter
Conductors
900-1050mm
900-1050mm
600x400x210
600x400x210
Single Phase
Single Phase
600x600x270
600x600x270
Three Phase
Three Phase
Cable Guard
supplied by
NIE Networks
Meter cubicle
Manufactured to
ESI standard
High impact
3mm thick PVC
cable guard
Ground Level
Height
Single Phase
Width
Depth
Box Dimensions
400mm
210mm
600mm
Box Dimensions
600mm
270mm
600mm
Three Phase
Height
Width
Depth
Location and Installation of Metering Cabinet
10
Figure 8: Meter box arrangements for recessed meter cabinet
550550
900-1050mm900-1050mm
Ground Level
Red duct
Damp proof
Membrane (DPM)
38/32mm
red duct
Customer Meter
Conductors
600x400x210600x400x210
Single PhaseSingle Phase
600x600x270600x600x270
Three PhaseThree Phase
Chamfer
Meter cubicle
Manufactured to
ESI standard
Meter cubicle
Manufactured to
ESI standard
All NIE Networks ducts and cables should enter the left hand side of the meter cubicle. Internal meter
board positions may be agreed at the planning stage.
To arrange the installation of your meter, please call 028 2566 1640 or email
To arrange the installation of your meter, please call 028 2566 1640 or email
MeteringServices[email protected].ukMeteringServices.Connections@nienetworks.co.uk
Figure 8: Meter arrangements for surface
mounted meter cabinet if recessed is not
available
CDM Regulations
NIE Networks will manage the construction phase of any electricity installation project and ensure that
the appropriate information is provided in respect of the electricity infrastructure and submitted to the
Principal Contractor for inclusion in the site Health and Safety plan.
In relation to the project, we will:
Design / sign off the design of the electricity distribution network
Co-operate with the Principal Contractor so far as is necessary to enable compliance with the duties
under the relevant statutory provisions
So far as is reasonably practicable, promptly provide the Principal Contractor with any information
(including any relevant part of the risk assessment) which might affect the health or safety of any
person working on the site
Comply with, as far as is reasonably practical, any directions of the Principal Contractor
Comply with any rules applicable to NIE Networks in the health and safety plan.
12
NIE Networks Utility Drawings
Where a site is being constructed either on or adjoining to the electricity network, the relevant
drawings can be requested. Verification of cable positions must be carried out on-site so that no
damage occurs to live equipment. Site Safety should be in accordance with: HSE Guidance note
GS6 (Avoiding Danger from Overhead Powerlines) and HSE booklet HS(G)47 (Avoiding Danger
from Underground Services). You can find more information at nienetworks.co.uk
nienetworks.co.uk
or hseni.gov.uk
hseni.gov.uk
.
12
Figure 9: Sample marked up utility drawing
Request marked up drawings of the electricity network by emailing
Request marked up drawings of the electricity network by emailing
[email protected]
[email protected]
or in
or in
writing to NIE Networks Drawing Office, Unit 3, Channel Wharf, Old Channel Road, Belfast.
writing to NIE Networks Drawing Office, Unit 3, Channel Wharf, Old Channel Road, Belfast.
Scale : 1:1250
Map Centre : 284675,364066
Project No: Site Adjacent to Any Street, Anytown.
400 kV
275 kV
110 kV
33 kV
11 kV
6.6 kV
MV
Service
Please note that smaller service cables may not be
shown. Always remember that it is the responsibility
of the excavator to locate and avoid damage to
N.I.E. equipment. Failure to do so may result in
those responsible being held liable.
Drawing No: 1234/12345
CAUTION! CABLES POSITIONS ARE APPROXIMATE
ONLY.
••••
••••
Date : 23/08/2017
09:16:27
Based upon the
ordnance Survey
map with the
permission of the
director and the
chief executive,
Crown copyright. ©
13
Safety Guidance
Customers requiring a service connection, in general and unless otherwise detailed in the connection
offer may be required to excavate cable trenches in private property to facilitate the laying of a service
cable and associated earthing conductors. If customers carry out digging on private property, or arrange
for someone else to do it they must ensure that the person(s) carrying out the work understand their
responsibilities under the Construction (Design & Management) Regulations (NI) 2015 and have read
and understand the booklet “Avoiding danger from Underground Services” (HSG 47) published by the
Health & Safety Executive. They should also discuss digging in the vicinity of other NIE networks
equipment e.g. poles/stays with a representative from NIE Networks. You can view our short video at
nienetworks.co.uk/connections.
Please remember that any preparatory works need to be completed in time for our visit. If you are not
ready we may have to postpone our visit, or charge you for any additional work we do.
All electrical apparatus must be treated as live. Any injury, damage to plant, regardless of size must be
reported to site owner/manager and NIE Networks immediately. Underground services, in particular
gas and electricity are extremely dangerous. Damage to electricity cables can cause a dangerous flash
that can lead to severe burns or death. Gas leaks can cause fire and explosion.
Damage can be a result of excavation or penetration to the ground. Underground utility services are
commonly found in roads, footpaths, sites and open land.
Prior to beginning excavation works ensure you have details of all underground services in the area and
they are made available to the persons carrying out the excavation. Not all service connection cables
connecting street lighting pillars or buildings may be shown.
You should use approved equipment to locate and confirm the position of electricity cables, pipes and
any other equipment within and around the area of planned excavation. Identify signs of service
connection cables, e.g. gas or electricity boxes, or service connection into a house or street lamp.
Use a CAT and Genny to do this.
Site Safety should be in accordance with: HSE Guidance note GS6 (Avoiding Danger from Overhead
Powerlines) and HSE booklet HS(G)47 (Avoiding Danger from Underground Services). You can find
more information at nienetworks.co.uk
nienetworks.co.uk
or hseni.gov.uk
hseni.gov.uk
.
In an emergency contact NIE Networks on 03457 643 643.
13
Customers requiring a service connection, in general and unless otherwise detailed in the connection
offer, may be required to excavate cable trenches in private property to facilitate the laying of a service
cable and associated earthing conductors. If customers carry out digging on private property, or arrange
for someone else to do it, they must ensure that the person(s) carrying out the work understand their
responsibilities under the Construction (Design & Management) Regulations (NI) 2015 and have read
and understood the booklet “Avoiding danger from Underground Services” (HSG 47) published by
the Health & Safety Executive. They should also discuss digging in the vicinity of other NIE Networks
equipment, e.g. poles/stays with a representative from NIE Networks. You can view our short video at
nienetworks.co.uk/connections.
All electrical apparatus must be treated as live. Any injury, damage to plant, regardless of size must be
reported to the site owner/manager and NIE Networks immediately. Underground services, in particular
gas and electricity are extremely dangerous. Damage to electricity cables can result in electrocution,
shock, severe burns or death. Gas leaks can cause fire, asphyxiation and explosion.
You should use appropriate equipment to locate and confirm the position of electricity cables, pipes
and any other equipment within and around the area of planned excavation. Identify signs of service
connection cables, e.g. gas or electricity boxes, or service connection into a house or street lamp. It is
recommended that an appropriate cable avoidance tool with generator is used to do this.
14
Blocks
4inch blocks (lightweight).
Sandbags
Woven white colour polypropylene sand bag
Filled sandbag contains approximately 15kg of sand
Pre filled sandbags approx. dimensions 25 x 50 x 10cm high
Cable ducts
All ducts for service, mains and HV cables shall be generally in accordance with ENA TS 12-24 and the
relevant parts of BS EN 61386. Service cable ducting shall be of Class 2 construction and all other
ducts Class 1.
Class 1 ducts shall be single walled, rigidly constructed with nominal diameter dimensions of
150/160 mm (internal/external) and supplied in 6m sections.
Class 2 ducts shall be coilable with internal bore diameter of 32 mm and supplied in 50m or 150m
coils.
All ducts for electric cables shall be coloured red and display the wording “DANGER ELECTRICITY -
NIE Networks.”
A copy of NIE Networks specification for ducting may be provided on request. Otherwise, NIE Networks’
Approved supplier of ducting is Emtelle. This ducting is available from:
TOTAL PIPELINE SPECIALISTS (NI) LIMITED The Pipe Crew Ltd
13A Blaris Industrial Estate 1 Nutfield Road
Altona Road Lisnaskea
Lisburn BT27 5QB Co. Fermanagh
Tel: 02892 660000 BT92 0LB
E: sales@total-pipeline.com Tel: 028 677 21336 / 07880 796 951
W: www.total-pipeline.com W: www.thepipecrew.com
E: [email protected]
E: ruairi.mcmanus@thepipecrew.com
NIE Networks reserve the right to inspect all ducting prior to the installation and jointing of cables on site.
Connections glossary
15
Cable bedding and backfill
The bedding and surrounds to cables shall be either fine grade washed sand to EN 13139 (BS 1200) or
fine quarry dust of similar grading. The quantity to be provided shall be enough to allow a total of 200 mm
of soft bedding material to surround the cables along the entire length of the cable route. As a guide one
tonne of fine quarry dust for every 5m of cable track should be supplied. This should be left in piles along
the track at 1 m intervals.
Backfill material may also be selected from material excavated from the trench, provided it does not
include:
Stones or lumps of clay greater than 40 mm nominal diameter;
Saturated material;
Rock;
Concrete, coated macadam, asphalt or other unnatural material.
Backfill material shall be placed in even layers and shall not be heaped in trench before being spread.
Spreading and compaction shall be carried out evenly without damaging the cables or other services
adjacent to the trench.
www.nienetworks.co.uk
120 Malone Road, Belfast BT9 5HT
Customer helpline: 03457 643 643
Twitter: @NIElectricity
Facebook: @NIENetworks
Instagram: nie.networks
Registered number: NI26041