National Code of Practice 3rd Edition

NATIONAL CODE OF PRACTICEFOR CUSTOMER INTERFACE

3RD Edition 2002

ESB Code: 9803279

Networks

Page 12002

This National Code of Practice for Customer Interface – 3rd edition replaces the 2ndedition issued in 1994.

The purpose of this National Code of Practice for Customer Interface is to have onesingle interpretation of ESB requirements.

It is a consensus document agreed between people involved in the electrical industryand ESB.

Contractors Associations, Consulting Engineers, Switchboard Assemblers, ElectricalWholesalers and Distributors made a very positive contribution in the compiling of thisCode.

It is important that everyone working at the ESB/Customer Interface or designingelectrical equipment for that interface fully understands the code and works to it.

Each ESB local office will provide details of who should be contacted regardingqueries, which may arise in the interpretation of this Code of Practice.

This Publication and future updates will be available at www.esb.ie

SCOPE

The National Code of Practice for Customer Interface relates to situations where aninterface between the customer and the ESB at 230/400 volts and/or MV exists.

The aim of the Code Book is to assist in achieving a single interpretation of therequirements for metering/connection.

ESB are fully supportive of ETCI and the regulatory bodies in their efforts to improvesafety and standards of electrical installations.

ESB recognise the need for and the importance of testing and certification of allelectrical installations.

Completion certificates are required for all new installations and alterations orextensions to all existing installations.

(See “ESB involvement in Completion Certificates” on page 3.)

FOREWORD

Page 22002

• Be aware of your working environment and your responsibilitiesto yourself and others.

• Contractors, Builders, Developers and ESB must meet allstatutory requirements in order that site conditions and sitepractices provide a safe working environment.

• Electrical Contractors and ESB staff should always be alert to thedangers and hazards associated with electric work.

• Particular attention is required when an installation is made livewhether on a permanent or temporary basis.

• Always make sure if you make an installation or part of aninstallation “live” that you have not created a dangerous situationfor someone else.

• Always check for absence of voltage before you work on anyinstallation.

Remember the Five Electrical SafetyRules

1. Disconnect Completely2. Secure against Reconnection3. Verify the installation is “dead”.4. Carry out earthing and short - circuiting(where appropriate).5. Provide protection against adjacent “live” parts.

SITE SAFETY

Page 32002

To comply with current legislation a completion certificate is required for all newelectrical installations and alterations to existing installations. This certificate isissued to the customer by the electrical contractor indicating that theinstallation is constructed and tested to meet ETCI requirements and is issuedwhen the job is completed.

ESB are not involved in inspecting the customer’s installation.

ESB require copies of completion certificates for the following only:

• All new installations/re-wires requiring connection to ESBnetwork.

• All alterations to existing installations involving changes to thewiring between ESB connection point/meter and the customer’sdistribution board.

This copy should only issue to ESB at the completed stage of the job.

All certificates received by the ESB are recorded against the job they issued forand the copies are returned to the respective regulatory body.

Copy of the completion certificate, is required to allow ESB to proceed with thejob. In situations requiring close co-operation between ESB and contractor, itis important to contact the local ESB supervisor at an early stage in theplanning of the work. The contractor may be requested to provide the numberof the completion certificate to be issued for the particular job. This number willbe recorded against the job and allow ESB process to be initiated.

Any contractor working in close proximity to live ESBsealed equipment (where no main isolator exists) shouldcontact the local ESB office if he requires isolation ofthat equipment to allow the work to proceed prior tocertification

ESB INVOLVEMENT IN THE COMPLETION CERTIFICATE PROCESS

Page 42002

In order to process the application for connection, the following informationshould be included on the completion certificate:

• Where applicable, the Customer reference number known as the MPRN.This number is readily available on correspondence the customer receivesfrom ESB regarding their application for new connection

• Details of the work requiring ESB involvement. (i.e. new supply, servicealteration, new meter)

In multi-tenanted / multi-metered situation a completion certificate is requiredfor each ESB connection, i.e. one certificate per customer connection point.

Where installations such as school signs, phone kiosks, bus shelters etc. areconnected to ESB network, a completion certificate is required for each suchconnection.

A completion certificate is required before supply will be restored to aninstallation that has been disconnected for more than 6 months.

All medium voltage installations require a completion certificate.

Note: As ETCI have not yet issued a certificate for MVinstallations, the Industrial/Commercial certificate isacceptable. ESB will also require a “Declaration ofFitness” for the MV installation before connection to ESBnetwork.

ESB INVOLVEMENT IN THE COMPLETION CERTIFICATE PROCESS

Page 52002

FOREWORD ..........................................................................................................................................1

SITE SAFETY..........................................................................................................................................2

ESB INVOLVEMENT IN THE COMPLETION CERT PROCESS........................................3-4

GENERAL REQUIREMENTS ....................................................................................................7-10

OUTDOOR METERING CABINET ..............................................................................................11

OVERHEAD SERVICE ALTERATION ..........................................................................................12

SINGLE UNDERGROUND SERVICE CONNECTED TO OVERHEAD NETWORK ......13

OUTDOOR BOX LAYOUT/TYPICAL LOCATION......................................................................14

DOMESTIC STANDARD SETUP separate Meter and Isolator ..............................................15

DOMESTIC STANDARD SETUP combined Meter and Isolator ............................................16

DOMESTIC PLUS STORAGE HEATING ....................................................................................17

DOMESTIC – NIGHT SAVER up to 8KW switching through contactor ............................18

DOMESTIC – NIGHT SAVER (direct switching up to 13KW NSH) ..................................19

DOMESTIC – NIGHT SAVER (switching through contactor up to 13KW NSH) ............20

DOMESTIC – NIGHT SAVER (goldshield) ................................................................................21

DOMESTIC OR COMMERCIAL WITH NSH LOADS IN EXCESS OF 13kW

(3 phase supply not available) ........................................................................................................22

DOMESTIC OR COMMERCIAL WITH NSH LOADS IN EXCESS OF 13kW

(3 phase supply available) ................................................................................................................23

CONNECTION CHECKLIST ..........................................................................................................24

ASSEMBLERS CHECKLIST ....................................................................................................25-27

FUSES BEFORE WHOLE CURRENT METERS IN MULTI-METERING

INSTALLATIONS (photos) ................................................................................................................28

FUSES BEFORE CT METERS IN MULTI-METERING INSTALLATIONS (photo) ........29

REQUIREMENTS FOR FRONT LOADING FUSE UNITS ....................................................30

METERING REQUIREMENTS (up to 3 apartments) ..............................................................31

METERING REQUIREMENTS (4 or more apartments) ..........................................................32

RELAY CONTROL DIAGRAM ........................................................................................................33

COMMERCIAL (multi-customer whole current)..........................................................................34

COMMERCIAL/INDUSTRIAL UNITS (general) ........................................................................35

ESB MAIN SUPPLY FUSED UP TO 300A (one customer bulk tariff)..................................36

CONTENTS

Page 62002

ESB MAIN SUPPLY FUSED UP TO 300A (one customer multi-tariff) ..........................................37

ESB MAIN SUPPLY FUSED UP TO 300A (Multiple customers) ....................................................38

SUPPLY OVER 300 AMPS (direct supply from sub station) ............................................................39

SUPPLY OVER 300 AMPS (single customer) ......................................................................................40

SUPPLY OVER 300 AMPS (multi-customer) ........................................................................................41

SUPPLY OVER 300 AMPS (photo, typical ESB cable termination ) ..............................................42

ARRANGEMENTS FOR FIRE FIGHTING SUPPLY............................................................................43

FIRE FIGHTING (warning labels) ..............................................................................................................44

DECENTRALISED METERING (single customer) ..............................................................................45

DECENTRALISED METERING (multi-customer) ................................................................................46

RECOMMENDED DIMENSIONS FOR CABINETS/BOXES ........................................................47

USEFUL GENERAL DIMENSIONS ........................................................................................................48

SPACE REQUIRED FOR ESB CABLE TERMINATIONS (200A and 300A) ..............................49

STAND ALONE CT ENCLOSURE............................................................................................................50

CT CONNECTIONS (250/5 AND 600/5)..............................................................................................51

CT CONNECTIONS (1500/5) ..................................................................................................................52

ESB MAIN SUPPLY OVER 300A (single customer, wall mounted switchboard) ........................53

SHOPPING CENTRES AND COMMERCIAL/INDUSTRIAL UNITS (general) ..........................54

SHOPPING CENTRES or COMMERCIAL/INDUSTRIAL UNITS (method 1) ..........................55

COMMERCIAL/INDUSTRIAL UNITS (method 2)................................................................................56

GROUPS OF SHOPS/OFFICES (facing onto public roadway) ......................................................57

TEMPORARY SUPPLIES ..........................................................................................................................58

PETROL STATIONS......................................................................................................................................59

STAND-BY GENERATORS (small supplies) ..........................................................................................60

STAND-BY GENERATORS (larger supplies) ........................................................................................61

STAND-BY GENERATORS (multi customer) ........................................................................................62

AGRICULTURAL/HORTICULTURAL PREMISES (general)..............................................................63

REMOTE BUILDINGS ................................................................................................................................64

SPECIAL SITUATIONS (street furniture, Garda cameras/CCTV etc.) ......................................65-71

REQUIREMENTS FOR CONNECTION AT MEDIUM VOLTAGE (MV) ..................................72-78

SYMBOLS (symbols used, colour code.) ................................................................................................79

CONTENTS

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1 CONSULTATION WITH ESB OFFICE It is essential to consult with the local ESB office at the planning stage of the followingprojects: new premises, refurbishment of existing premises, major additions to existingload. Please submit to ESB all relevant information such as site maps, architectsdrawings, etc. to allow applications to be processed efficiently.

2 LOAD THRESHOLDS(a) New Installations: Single phase whole current meters will be used to measure loads up to 80A per phase.In general, three phase whole current meters will be used to measure loads over threephases up to 80A per phase. Current transformers with matching meters will be used tomeasure loads in excess of 80A per phase. Allowances for potential load growth shouldalways be made.

(b) Extensions/Renovations to Existing Metering: Discuss with local ESB Office beforehand, where three phase whole current meteringat 100A per phase will be considered.

ESB will supply and fit a main fuse unit for total loads within a building up to 300A (200kVA). ESB may require a Substation for loads in excess of 300 A (200 kVA). Customer willsupply and fit a main circuit breaker. New loads in excess of 500kVA will in general besupplied at medium voltage.

3 ENCLOSURES FOR METERING EQUIPMENT(a) Particular to Domestic installations.(i) Only ESB equipment should be fitted in outdoor metering cabinet (Only exception

Page 58) (ii) Page11 shows a typical outdoor Metering cabinet. This is the standard method for

new Metering.(iii) Where it is clearly impossible to fit ESB equipment into an accessible outdoor

location, the local ESB office should be consulted at the planning stage, todetermine the most suitable location.

(iv) Where indoor locations are permitted an enclosure shall be provided for ESBequipment. See page 47 for details on enclosures.

(b) Current Transformer (CT) Metering: Customer shall supply and fit a sealableenclosure to accept ESB CTs. Where a main switchboard is installed this enclosureshould be within the switchboard. C.T. Meter Cabinets (supplied and fitted by ESB) areinstalled on a wall adjacent to the main switchboard. In some situationsconsideration will be given to incorporate ESB CT Meters into the mainSwitchboard. To determine whether this is feasible, discussions shall takeplace with Local ESB at the design stage of the Switchboard.

GENERAL REQUIREMENTS

Page 82002

Note: Where the CT Enclosure is of a metal type this cover shall be hinged as well assealable.

Where the CTs are on the ESB side of the customers main disconnecting device, theenclosure shall offer protection against contact with live parts by the ingress of tools,wires or any other foreign body. (IP 30 min.) (Note: For wall mounted MeterCabinets, CT Secondary cable run shall not exceed 15 Metres.)

(c) Whole Current Metering: Whole current meters and ESB equipment areinstalled by ESB in an enclosure supplied and fitted by the customer. (See page 47).

Whole current meter enclosures shall have hinged cover or visor and standard 8mmTriangular lock.

ESB metering equipment shall be fitted in indoor situations at a height from floor levelno lower than 600 mm to the bottom of the lowest meter and no higher than 2000 mmto top of highest meter.

4 REQUIREMENTS FOR METERING ENCLOSURES.

(See page 47)

5 PROTECTION FOR SECONDARY CABLES FROM ESB METERING CT’SWITHIN MAIN SWITCHBOARD

Trunking or conduit (min. 75 mm per set of CTs with draw wire) to protect secondarycables shall be provided by the Customer within the main switch board. This should beof metal, rigid plastic or similar.

Metal trunking of adequate size (MIN. 100mm) shall be provided from the switchboardto the CT metering cabinet AND MUST BE SEALABLE. See paragraph 9 re: ESBSEALS

6 ACCESS TO METERING EQUIPMENT

ESB meters should be grouped in one easily accessible location (Centralised). ESBwhole current meters and CTs should be located in one section of a Main Switchboardto allow for regular testing and inspection. Each set of CTs should be physicallyseparated to allow them be worked on individually. A separate neutral bar shall beprovided adjacent to each set of CTs.

Access to ESB equipment must be available at all times. All enclosures used forESB meters shall have a standard 8mm triangular lock fitted. A clear spaceof at least 1.2m must be left in front of ESB equipment.

7 UNACCEPTABLE LOCATIONS FOR ESB MAIN FUSES AND METERS

ESB main fuses and Meters shall not be installed in: Toilets, cellars, boiler houses, fuelstores, storage cupboards, underneath wooden stairs or any location liable to dust,


Page 92002

dampness, heat, vibration or any location having a corrosive atmosphere. Anylocation likely to be blocked by machinery, goods, furniture, or liable to causeaccidents is not permitted.

8 CUSTOMER MATERIALS

The customer shall provide: all trunking, cables and connectors beyond the ESB maincable terminations. Load cables for connection to ESB main fuse unit, whole currentmeters or CTs to be stranded copper conductor or multi-stranded flexible copperconductor. Where multi-stranded cables are used they must be fitted with appropriateferrules or lugs.

9 ESB SEALS

All access to unmetered enclosures, unmetered fuses, C.T. enclosures, secondarywiring and busbar chambers and all other possible points of access to unmeteredsupply shall be made inaccessible by means of a sealing system fitted by themanufacturer which will be sealed by ESB. Seals should be visible for inspection at alltimes.

Note: Sealing holes drilled in cover which allow sealing wire enter the enclosure areunacceptable.

NOTE TO CONTRACTORS REGARDING ESB SEALS

(1) ESB seal numbers are registered on customer’s meter record. DO NOT breakthem.

(2) If you find ESB seals are broken or missing report to ESB Call Centre.

(3) Do not work on, or move ESB metering equipment as serious accountingproblems with customer may result.

(4) Sealing and the removal of all seals shall be undertaken by ESB staff only.

10 LABELLING

Metering equipment shall be labelled ‘ESB Whole Current.’ or ‘ESB CTs etc.Unmetered equipment should be clearly labelled “ESB’. Labels must be of permanentand durable material. It is important that the electrical contractor have them in placebefore connection of supply. Supply taken from the live side of main circuit breakershould be suitably labelled, and clearly visible to a person operating the main breaker.Labels shall be fitted onto the fixed sections of a switchboard so as to eliminate thepotential danger where labelled doors/covers are interchangeable.

In Multi-Metering installations a permanent label is required for: the Fuse before theMeter, the Meter and the outgoing switchfuse/MCB. In Relay installations all controlwiring shall be permanently labelled with relevant Apartment/Unit number. Theselabels shall be fitted at the meter, the relays and the outgoing switchfuse/MCB.


Page 102002

11 TARIFFS

Circuits for separately metered tariffs require electrical and physical segregation.Providing this is satisfied they may be catered for side by side in the same enclosure.NOTE: The customer or consultant acting on customer’s behalf should ensure thecorrect tariff applies to the installation.

12 SWITCHBOARD ADAPTABILITY

Switchboards being designed for speculative developments should make provision forthe various likely metering permutations to avoid costly alterations at theLetting/Connection stage.

13 MULTI-CUSTOMER PREMISES

For Connections up to 200kVA, ESB approved fuse units (pages 28-29) shall besupplied and fitted by the customer before ESB whole current meters and ESBmetering current transformers (CTs). Above 200kVa the customer’s circuit breaker isfitted before the CTs. All meters and metering equipment for each customer shall belocated at one central point, normally at the termination of ESB connection cable. Inall new indoor installations suitable enclosures shall be provided to accept ESBequipment.

14 BUSBARS/LINK BOXES

If the main isolator is not capable of receiving more than two cable connections then aBusbar chamber is required. In some situations a suitable link box is acceptable.

15 MAIN PROTECTIVE CONDUCTOR CONNECTION (NEUTRALISING)

The customer’s Main Protective Conductor is connected to the supply neutral at theMain Connection point.

16 MAIN CONNECTION POINT

ESB’s responsibility extends up to customers Main Connection point: The Customer /Customers representative has responsibility for the electrical installation from that MainConnection point. The Main connection point’ is normally:

In Major Installations: (a) At ESB main fuses Or (b) On Incoming side ofcustomer’s main circuit breaker

In other installations: (a) At connection point of customer’s tails. Or (b) OnCustomer’s side of ESB isolator

In indoor locations where ESB Main Fuse Unit is fitted it shall be locatedclose to an external door (i.e. within 2mts).

17 ACCESS TO ESB EQUIPMENT ON CUSTOMER’S PREMISES:

Specific arrangements may have to be made for particular premises using key safeswhich are available from ESB. Contact local ESB office for information.


Page 112002

ESBEquipment only

to be fitted inoutside meter box.

ESB CustomerSupply entry Tails entry

point point

Note: Meter cabinet must comply with ESB Specifications

Flange of cabinet to be water sealed and polythene damp proof course to be fitted by builder

Customer Meter tails to enter at the bottom rightof the Meter cabinet. See notes below.

1.2

M M

ax. 1

M M

in.

From

fini

shed

gro

und

leve

l

25mm

Fixing Spikes

50mm Dia. red electric cable duct, projecting 25mm inside the meter cabinet.

Water drain hole in the lowest section of the pipe.

10mm draw-in rope (free of knots) to draw ESB supply cable.

Hockey stick for service cable

Depth600mm

•To Comfortably accept the above cabinet, builders should provide an opening of606mm (h) x 402 (w) x 155 (d)

•Where applicable, ensure that door hangs so as to allow latch to fall into closedposition

•For ESB O/H supply situation see Sketch on page 12/13 and/or contact local ESBoffice before fitting box

•Meter Cabinet to be located within 2M from the front line of the building and allowingESB unobstructed access for meter reading.

•Each outside box must have identification to associate it with a particularinstallation/address, this I.D. should be in place at service installation stage.Note: Entry point for customer tails will be accepted at right hand side wallof box. This entry point shall be DRILLED as close as possible to bottomright hand corner.

Typical method of installation of outdoor Meter Cabinet

OUTDOOR METERING CABINET

Page 122002

External Meter Cabinet

CRO

SS S

ECTI

ON

VIEW

New Service

New inlet pipe (to be fitted by Customer)

External meter cabinet with cable entries at the bottom.

Ground level

Retired section

Meter Relocation / Service Alterationwhere U.G. service is not possible.

1.2 M Max. 1M Min. From finished ground level

Old Internal Meter Position

To C

onsu

mer

Uni

t

Existing Service

1M Approx.

New Service

•New Service cable to be installed in cavity. If no cavity exists, the service cable maybe clipped on surface to enter meter cabinet at top left hand side.

•Service cables shall not run in cavity where cavity insulation exists and may affect thePVC insulation on the cable.

SERVICE ALTERATION

Page 132002

•Where specified by ESB, a cable run longer than 50m (approx.) may require a largerduct or an approved service vault or both.•See Current “ESB Specification for underground Service” .•10mm Draw rope in one continuous length.•In all cases ETCI rules will apply. Circuits shown are for example only.

SPECIFICATION FOR SINGLE UNDER GROUNDSERVICE CONNECTED TO OVERHEAD NETWORK

Flange of cabinet to be water sealed and polythene damp proof course to be fitted

Tails from customersFuse Board

10 mm draw-in rope to pull in service cables.

All cables to enter the meter box at the bottom.

"Hockey Stick Duct" to project 25 mm into box

Hockey stick joint

Warning Tape at 300mm depth

1.2

M M

ax 1

M M

in.

From

fini

shed

gro

und

leve

l

Drainage slots atlowest level

ESBNetwork Pole

(Existing)

ESB Approved 50mm SolidWall MDPE/PVC Red Duct at 600mm Depth

Page 142002

Typical layout within outside box.Note: cable entry and exits atbottom of box.

Customer cable may also enter through drilled hole at bottom right hand side of box.

Typical location of outside box at side of house in front of security gates.

OUTDOOR BOX LAYOUT/LOCATIONS

Page 152002

DOMESTIC STANDARD SETUP

M

DOMESTIC

RCD

ESBFUSE

Service appropriateto load

IsolatorESB

E

Main protective conductor to main Neutral

Separate Meter and Isolator

•In All cases ETCI rules will apply.•Circuits are shown for example only.

Page 162002

DOMESTIC STANDARD SETUP

M

DOMESTIC

RCD

ESBFUSE


E

Main protective conductor to

main Neutral

Combined Meter and Isolator

•N.B. Do not operate isolator on load.•In All cases ETCI rules will apply. Circuits are shown for example only.

Page 172002

DOMESTIC PLUS STORAGE HEATING

M

NSHDOMESTIC

RCD

ESBFUSE


NSH

IsolatorESB

IsolatorESB

Interlock or seperatefuseboards (ETCI)

M

E


main Neutral

DOMESTIC PLUS SEPARATE NSH METERUP TO 13kW NSH*

*Installations involving more than a total of 2.5 kW require advance application to yourlocal ESB Area. A charge may apply.•Combination Meter/Isolator may be used. •In All cases ETCI rules will apply. Circuits are shown for example only.

Page 182002

DOMESTIC - NIGHT SAVER

M

NSHDOMESTIC

RCD

CONTACTOR N

ESBFUSE

Isolator


ROOM THERMOSTAT

(OPTIONAL)

ESB

Contr

ol Pa

ir 2 x

1.5sq

(BRO

WN)

E


main Neutral

DOMESTIC PLUS UP TO 8kW NSH* SWITCHING THROUGH CONTACTOR

*Installations involving more than a total of 2.5 kW require advance application to yourlocal ESB Area. A charge may apply.•In All cases ETCI rules will apply.•Circuits are shown for example only.•Double Tariff Meter/Isolator combination also available

Page 192002

DOMESTIC - NIGHT SAVERMethod 1

M

DOMESTIC

RCD

ESBFUSE

NSH

ESB Isolators


E

Main Protective Conductor to main Neutral

Interlock or seperatefuseboards (RTCI)

DOMESTIC PLUS UP TO 13kW NSH* Direct switching at NSH Timeswitch

*Installations involving more than a total of 2.5 kW require advance application to yourlocal ESB Area. A charge may apply.•Single Domestic Connection plus 13kW NSH. (no loop). •Looped Domestic Connection a combined total of 13kW (accross both connections)•In all cases ETCI rules will apply. Circuits shown are for example only.

Page 202002

DOMESTIC - NIGHT SAVERMethod 2

M

DOMESTIC

RCD

CONTACTOR N

ESBFUSE

ROOMTHERMOSTAT(OPTIONAL)

Contr

ol Pa

ir 2 x

1.5sq

(BRO

WN)


NSH

Tails to comply with ETCI Regulations.

Interlock or seperate fuseboards (ETCI)

IsolatorESB

E


main Neutral

DOMESTIC PLUS UP TO 13kW NSH* Contactor switching NSH

*Installations involving more than a total of 2.5 kW require advance application to yourlocal ESB Area. A charge may apply.•Double Tariff Meter/Isolator combination also available•In all cases ETCI rules will apply. Circuits shown are for example only.

Page 212002

•Installations involving more than a total of 2.5 kW require advance application to yourlocal ESB Area. A charge may apply.•In all cases ETCI rules will apply. Circuits shown are for example only.

DOMESTIC - NIGHT SAVERGOLD SHIELD

M

DOMESTIC

RCD

CONTACTOR N

ESBFUSE

E


NSH

Interlock or seperate fuseboards(ETCI)

1 2 3 4 5 6

7 8 9 10 11 12

Anticipatory Control

O utdoor Tem perature

Sensor

6AMCB

63ASwitch Fuse

63ASwitch Fuse

NOTE PERMANENT SUPPLY TO TERMINALS 5 & 6

2 x 1.5 sq mm

Control Pair 2 x 1.5sq (Brown)

TONEUTRALISINGCONNECTION

ESBIsolator

ALL GOLDSHIELD DEVELOPMENTS UP TO 13kW NSH

Page 222002

DOMESTIC OR COMMERCIALWITH NSH LOADS IN EXCESS OF 13kW

MCo

ntrol

Pair 2

x 1.5

sq (B

ROW

N)

Service appropriate to load

CONTACTOR N

RCD

DOMESTIC OR GENERAL PURPOSE NIGHT STORAGE HEATING

COIL

whereappropriate

E


main Neutral

SINGLE PHASE C.T. METERING(3 PHASE CONNECTION NOT AVAILABLE)

•Installations involving more than a total of 2.5 kW require advance application to yourlocal ESB Area. A charge may apply.

•Service appropriate to Load•In outdoor locations standard outdoor cabinet with 150A window type CT in suitablebox 125 x 125mm with sealing bush. No file terminals.

•In indoor locations standard CT cabinet with file terminals should be used.•In all cases ETCI rules will apply. Circuits shown are for example only.

Page 232002

DOMESTIC OR COMMERCIALWITH NSH LOADS IN EXCESS OF 13kW

CONTACTOR N

RCD

DOMESTIC OR GENERAL PURPOSE NIGHT STORAGE HEATING

M

COIL

whereappropriate

Con

trol P

air 2

x1.5

sq m

m (B

RO

WN

)

ESB Service appropriate to load

ESB Fuses

IsolatorESB

Ensure that the contactor coil and time switch are fed from the R phase.

E


main Neutral

3 PHASE CONNECTION AVAILABLE Double Tariff Metering

•Installations involving more than a total of 2.5 kW require advance application to yourlocal ESB Area. A charge may apply.•ESB isolator will only apply up to 80amp service.•See page 47/49 for space required for ESB main fuse.•In all cases ETCI Rules will apply. Circuits shown are for example only.

Page 242002

• Application for Connection submitted to ESB.• Correct level of Connection Capacity applied for.• Terms for Connection issued by ESB and accepted by customer.• Suitable location for Connection agreed with ESB.• Is there sufficient space provided for ESB equipment.• Are all trenches,ducts and ways, provided for installation of ESB

cable to specification?• Access arrangements for ESB staff to premises/building.• Is the installation completed.• Completion certificate

Specific to Multi-Metering Connections

• All apartment doors must have permanent numbers fitted.• All un-metered fuses and outgoing switch fuses must be

permanently labelled with the relevant apartment numbers.• Permanent numbers must be available for each meter.• All relay control wiring must be permanently labelled with the

relevant apartment numbers and at the relays, at the meters and atthe outgoing switch fuses/MCBs.

• Circuits to the apartments, including the control wiring must be checked out before certification.

• All unmetered equipment to be sealable.• Code of Practice requirements must be complied with including

the height of ESB equipment from the floor. Permanent access tothe metering equipment must be in place. This may require the installation of a Key Safe.

CONNECTION CHECKLIST

Page 252002

(All enclosures for ESB metering equipment shall comply with ETCI“Code of Practice for the Design and Erection of Low VoltageSwitchgear Assemblies”.

1. Provide sealing facilities at :• Main Isolator.• Un-metered cable/busbar sections.• Un-metered fuses. (individual sealing)• Shrouding around un-metered fuses.• Meter plate.• Relays Compartment.• All surface mounted trunking used for unmetered wiring.• All unmetered equipment.

2. Shrouding (At Unmetered Fuses)• The front cover at unmetered fuses must be one continuous piece

with separate windows cut at 20mm spacing between each fuse

3. Dividers• Metered and un-metered sections separated.• Relay/un-metered fuse sections separated from other live equipment.

(To allow replacement in safety)

4. Customers Outgoing File Terminals: • All terminals shrouded.

5. Labelling :• On un-metered fuses • On meters• On relay control wiring • On time-switches• On Customers outgoing switchfuse or MCB

6. Relays :• Are in self contained sealable compartments.• Numbered tags (Apartment/Unit) on control wiring at relays, meters,

and outgoing file terminal connections.• T/Sw fused at 10A

ASSEMBLERS CHECKLIST

Page 262002

7. ESB T/SW :• Locate with ESB meters.• On non relay installations: Meter and T/Sw adjacent. • D/T Dial control cables in place.

8. Holes for Meter and Time-switches :-• To specified spacing. (Available from local metering supervisor)• Hole size 3 to 4mm• Provide 3 to 4mm x 10mm stub ended screws. (Posi-drive, self tappers

etc.)

9. Meter Tails / Unmetered Cables :• Ferrules are fitted. (20mm to 25mm long)• Tails are numbered. (Apartment/Unit)• Where cables are concealed they shall be accessible for inspection.

This access shall be gained through the removal of an ESB seal. These cables should not be clipped or tied, so that individual cables can be replaced readily.

10. Fuses: (pages 28-29)• Whole current: - ESB will provide fuses. • C.T.s: - Assembler provides NH fuses in Units to IP20.

11. 200A Connection:• Multi Stranded Cable is acceptable for all new 200/300 Amp ESB

Cut Outs.• Note: where connection is required to existing older type ESB Cut

Outs, Stranded or Solid (Soldered) tails may be required. Consult with local ESB.

12. Over 300A supply:• Copper Bars tinned to accept ESB Connection cables.(Pages 42/51/52)

13. Customers circuits:• Should not pass through un-metered sections.


Page 272002

14. C.T.s : (Pages 51-53)• Neutral and Earth terminals adjacent to C.T.s• Double support on busbars.• Main isolator should be adjacent to Connection Point.• Sizings/spacings comply.• In self-contained units fit separators top and bottom.

15. Locks: • Triangular, 8mm.

16. On site :• ESB main Connection cutout: Is provision required for it within the

board. (See page 49)• Will ESB Connection be to left, right, top or bottom of Board.• Main isolator should be adjacent to supply• For supply over 300amps, Main circuit breaker must be directly over

the Incoming duct from ESB substation. • Are meters at correct height. (See page 8 paragraph 3 item C)

17. Colour Coding: -• To ETCI wiring rules. - Reference ET 101


Page 282002

80 Amp Fuse units conforming toBS7657 which accept RH/RHLcartridge fuses approved to eitherBS 1631 or BS 88 part 3.

All must be individually sealabe.

80/125A front loading unit with 22x 58 fuse link conforming to IEC408-269.2

All must be individually sealabe.

For 3 Phase Meterings the unitsmay be ganged to accommodateone seal.

A 20mm (min) space being leftbetween each unit.

FUSES BEFORE WHOLE CURRENTMETERS IN MULTI-METERING

INSTALLATIONS

Page 292002

NH type units conforming to IEC269.2.1 and DIN 43620, withshrouding conforming to IP 20 enclosing all terminals.

Access cover of Enclosure containing NH units must besealable.

FUSES BEFORE CT METERS IN MULTI-METERING INSTALLATIONS

UP TO 200 kVA

Page 302002

The shrouding at unmetered fuses must be one continuous piecewith separate windows cut at 20mm spacing between eachFuse Unit.

Each Fuse Unit must be individually sealable.

Shrouding at Fuses must be sealable.

REQUIREMENTS FOR FRONTLOADING FUSE UNITS

Seals applied here

20mm spacebetween fuses

Each fuseindividually sealed

Page 312002

UP TO 3 APARTMENTS

DOM NSH

NS

For fuse type see page 28

0.6M

Min.

to bo

ttom

of M

eter

2M M

ax to

top o

f Mete

r

LandlordMeter

0.2M

Min.

to bo

ttom

of fu

ses

BUS BARCHAMBER(LINK BOX)

NSHDOM

ESBCut-Out

Refer to page 49 Space required for cable terminations

Sw-Fuse/McbTo comply with ETCI

NIGHT SAVER METERING DOMESTIC PLUS SEPARATENSH METERING

(Will also suit small industrial/commercial premises)

•ESB provide and fit Timeswitches to control meter dials and off peak load.•Labelling: Fuses, Meters and Isolators MUST have permanent labels beforeconnection.

•Apartments must be permanently numbered before connection.•All surface mounted trunking used for unmetered wiring must be sealable.•All unmetered equipment must be sealed.•Refer to “Assemblers Checklist” page 25.•Service size appropriate to load.•See Pages 47 and 49 for space required for ESB main fuse Cut-Out.•In all cases ETCI rules will apply. Circuits shown are for example only

Page 322002

•Labelling: Fuses, Meters and Isolators MUST have permanent labels beforeconnection.

•Apartments must be permanently numbered before connection.•All surface mounted trunking used for unmetered wiring must be sealable.•All unmetered equipment must be sealed.•Refer to Assemblers Checklist page 25.•Relays reqd. for 4 or more Double Tariff/NSH accounts.•1 Timeswitch (ESB) to control up to 16 apartments See page 33 for Relay wiring.•See Pages 47 and 49 for space reqd for ESB main fuse cut-out•In all cases ETCI rules will apply. Circuits shown are for example only.

4 OR MORE APARTMENTS

NS NS NSNS NS

NS NSNS NS

Relay

NS

Control pair from each appartment.

Relay also controls meter dial change-over. See page 33 for relay wiring details.


0.6M

Min.

to bo

ttom

of M

eter

2M M

ax to

top o

f Mete

r

0.2M

Min.

to bo

ttom

of fu

ses


ESBCut-Out

Refer to page 49 for Space required for cable terminations


NIGHT SAVER TARIFF WITH RELAYS TO SWITCH METERDIALS AND NSH CONTRACTORS.

(Will also suit small industrial/commercial premises)

Page 332002

•10 Amp fused feed to each time switch from unmetered supply (fuse supplied bycustomer).

•Time Switch to be surface mounted at eye level.•All wiring to relays 1.5sq.mm 7 stranded single P.V.C. cable. d1 red/blue d2brown/white. NOTE: the connections to meters must be ferruled.

•Control cable to be labelled with flat/unit numbers at outgoing file terminals, relayterminals and meter positions.

•Relays to be in a sealed, self contained enclosure.•Relays to be of an approved type with CE mark and must comply with IEC 60947, orequivalent EU National Standard e.g. BS, VDE.

•Relays to be interchangeable and mounted on Din Rail.•Relay coils to be rated at 230V, with 8 normally open contacts Rated at 400V.

RELAY CONTROL DIAGRAM

d1 d1

13 14

23 24

33 34

43 44

53 54

63 64

73 74

83 8483 84

73

63

53

43

74

64

44

54

13

23

33

14

34

24

A1 A2 A1 A2

N

L

TIME SWITCH

POSITIONIN NIGHTSWITCH SHOWN

GRASSLIN MIL02T/QRTUZ

CONTACT STATESWITCHING TIME

DT (d1)

ON 0800OFF 2300

N.S.H. (d2)

ON 2300OFF 0800

73 74

A2A1

d2

83 84

53

63

33

43

23

13

54

64

44

34

14

24

7473

A1

d2

83

A2

84

53

63

43

33

54

64

44

34

13

23

14

24

To N.S.H. contactor coil circuits.

Brow

n

Whit

e

Example of 1 installationCan be repeated by up to 16 per time clock

Red

Blue

SUITABLE FOR NS MULTIMETERINGNote: All control wiring including supply to time switch

and relay coils provided by customer.

Page 342002

COMMERCIAL

GPE


0.6M

Min.

to bo

ttom

of M

eter

2M M

ax to

top o

f Mete

r

0.2M

Min.

to bo

ttom

of fu

ses


GP NSH

ESBCut-Out

Refer to page 49 for Space required for cable terminations


MULTI - CUSTOMERS - WHOLE CURRENTPHYSICAL LAYOUT (Will also suit industrial premises)

•Labelling: Fuses, Meters and Isolators MUST have permanent labels beforeconnection.

•Units must be permanently numbered before connection.•All surface mounted trunking used for unmetered wiring must be sealable.•All unmetered equipment must be sealed.•Refer to Assemblers Checklist page 25.•Relays reqd. for 4 or more Double Tariff/NSH Accounts see page 33 for relay wiring.•1 Timeswitch to control up to 16 Units•In all cases ETCI rules will apply. Circuits shown are for example only.

Page 352002

1. The final letting arrangements in Commercial Units seldom becomeapparent until a very late stage. Therefore, various meteringpermutations should be considered in the main switchboard at thedesign stage. This may avoid subsequent costly alterations.

2. Pages 38 or 41 will cater for Multi-Customers.

Pages 36, 37 or 40 will cater for One Customer occupying the entirebuilding with Metering before the customer’s main circuit breaker.

Page 41 will cater for a combination of centralised/decentralisedmetering.

In some larger buildings a rising main may be acceptable. Discusswith local ESB at design stage. See pages 45/46 for installationsinvolving Rising Mains.

3. The installation of SWA cables from main switchboard to each floor,means that the SWAs can be used as circuit mains, or as unmeteredrising mains, facilitating changes in metering as letting arrangementschange.

4. Unmetered rising mains are installed and maintained by customersand should always be visible for inspection. All takeoff points musthave provision for sealing by the ESB.

NOTE: The customer or agent acting on customer’s behalfshould consult with the supplier to ensure the correct tariffapplies to the installation.

PARTICULAR TO OFFICE BLOCKS

Page 362002

ESB MAIN CONNECTIONFUSED UP TO 300A (200KVA)

Min.

1M M

ax 1.

4M

M

ESBCut-Out

Refer to page 49Space required forcable terminations

ESBCut-Out

ESBIsolator


MC.T. Meter

Option 1Whole Current

Option 2Current Transformer

ARRANGEMENT FOR ONE CUSTOMER BULK TARIFF

•In indoor locations ESB Main Fuse Unit shall be located close to an external door(i.e. within •2m).

•ESB supply and fit Timeswitches to control meter dials and off peak load. •For Whole Current Metering up to 100A. ESB Isolator to be used•If Fire Fighting equipment is installed, please refer to page 43.•For Cabinet sizes please see page 53 •In all cases ETCI rules will apply. Circuits shown are for example only

Page 372002


C.T.

TO CUSTOMERS EQUIPMENT

M

200Amp / 300AmpESB Service

ESBCut-Out



ARRANGEMENT FOR ONE CUSTOMER MULTI-TARIFF

•In indoor locations, ESB Main Fuse Unit shall be located close to an external door(i.e. within •2m). •The ESB service cable should penetrate no more than 2m on the horizontal from theinside of the main external wall.•If Fire Fighting equipment is installed, please refer to page 43. •For Cabinet sizes please see page 53•In all cases ETCI rules will apply. Circuits shown are for example only

Page 382002


Main Isolator(ETCI)

BUSBAR CHAMBER(LINK BOX)

Warning lables and seperate distribution boards required.

Fuses seePage 29

N.S.H. C.T.G.P.


Customer 1 Customer 2


200Amp / 300AmpESB Service

ESBCut-Out


ARRANGEMENT FOR MULTIPLE CUSTOMERS

•In indoor locations ESB Main Fuse Unit shall be located close to an external door(i.e. within 2m).

•Units requiring connection, must be permanently numbered/labelled.•Circuit mains connecting each unit must be numbered/labelled at both ends andcorrespond with unit/door numbers/labels.

•If Fire Fighting equipment is installed, please refer to page 43•Busbar Chamber may be omitted if max. of 2 cables can be connected to eachphase at main isolator

•For Cabinet sizes please see 53•In all cases ETCI rules will apply. Circuits shown are for example only.

Page 392002

CONNECTION OVER 300 AMPS

ESB SubElevation View

Customer Switch Room

ESB LT Panel

Customer Main Circuit Breaker

Cable Duct

Customer Main Circuit Breaker

ESB LT Panel

ESB SubPlan View

Customer Switch Room

Total Cable length notto exceed 10 Metres

Direct connection from Sub Station

•Customer switchroom must be adjoining ESB substation.•ESB Cable run to Customer Main Circuit Breaker must not be more than 10 metresin total•length and no more than 5 metres within the customer’s Switch Room.

•Customer’s Main circuit breaker must be directly over the incoming duct from ESB•substation.

•See Current General specification for MV Substation Buildings.

Page 402002


MAIN SWITCHBOARD


ESB CONNECTION DIRECT TO CUSTOMERS MAINCIRCUIT BREAKER

ONE CUSTOMER

•Labelling: All switch gear including metering equipment must be permanentlylabelled before •connection.

•See pages 51/52 for information on CT Connections.•If Fire Fighting equipment is installed, please refer to page 43.•Refer to page 39 re: max cable run.•In all cases ETCI rules will apply. Circuits shown are for example only.

Page 412002


M M

Switch Fuseor MCCB's

Customerover 200 KVA

UnmeteredRising Main


ESB CONNECTION DIRECT TO CUSTOMERS MAINCIRCUIT BREAKER

MULTI CUSTOMERS - CENTRALISED/DECENTRALISED METERING

•Labelling: All switch gear including metering equipment must be permanently labelledbefore connection.

•Circuit mains connecting each customer must be numbered/labelled at both endsand •correspond with unit/door numbers/labels.

•Protection / Short Circuit device controlling unmetered rising main shall be lockablein the OFF position.

•If Fire Fighting equipment is installed, please refer to page 43.•Leave space for CT meter Cabinet.•Refer to page 39 r.e. max. cable run.•In all cases ETCI rules will apply. Circuits shown are for example only.

Page 422002


Where ESB cables terminate directly ontoincoming main Circuit Breaker

•Sealant required at cable entry•Coppers tinned for aluminium lugs•Above photograph shows supply to multi-customer installation. Multi-metering •arrangement as per page 41

•In single customer installation CTs are fitted before main CB. The cover onthis •enclosure must not be interlocked with main CB

Page 432002

ARRANGEMENTS FORFIRE FIGHTING CONNECTION

M

GeneratorESB

Mech. or Electrical Interlock

Mech. or Elect. Interlock

Fig. 1 Supply up to 300A. From live side of Cutout.Multi or Single Customer

Fig. 2 Over 300A. Multi Customer

Fig. 3 Supply over 300A. Single Customer

Fig. 4 Supply over 300A. Multi Customer. Multi Changeover Dual Busbar

To F.F.Equipment

F.F. CT's

Main Isolator(ETCI)

F.F. CT's

Supply Supply

To CustomersEquipment

To F.F.Equipment

Supply

To F.F.Equipment

To F.F.Equipment



To Busbar Systems

C

C

•If fire fighting equipment is installed, Switch Fuse to be fitted as near as possible toESB •incoming supply.

•Warning labels to be applied to Main CB and FF switch fuse See page 44 forwording

•In all cases ETCI rules will apply. Circuits shown are for example only.

Page 442002

FIRE FIGHTING SAFETY LABELS

Wording required on Fire Fighting (F/F) Labels.Labels to be securely fitted at appropriate points.

Labels for fig. 1 page 43(a) Label for E.S.B Cut Out

DANGERSupply to F/F

fed from live side ofE.S.B Cut out Fuses

DANGERFed from

live side of E.S.BCut out Fuses

(b) Label for F/F Switch Fuse

Labels for fig. 2 and fig. 3 page 43(a) Label for Main Circuit Breaker

DANGERSupply to F/F

fed from live side ofMain CB

DANGERFed from

live side of Main CB

(b) Label for F/F Switch Fuse

Labels for fig. 4 page 43(a) Label for Main Circuit Breaker,

Firefighting Fuse and Switch Fuse

DANGERSupply to F/F

fed from live side ofMain CB

DANGERSupply to F/F

fed from live side ofGenerator CB

(b) Label for Generator Main Circuit Breakerand Stand-by F/F Switch Fuse

Page 452002

SINGLE CUSTOMER

WHERE METERING IS LOCATEDON CUSTOMERS PREMISES

REMOTE FROM MAIN SW/BOARD

C.T.S

LARGE SINGLE CUSTOMEROVER 80 AMPS PER PHASE

WHOLE CURRENT

SMALL SINGLE CUSTOMERUP TO 80 AMPS PER PHASE

RISING MAINFROM MAIN SW/BOARD

M

RISING MAINFROM MAIN SW/BOARD

ISOLATOR ISOLATOR


RISING MAIN FED FROM SW/BOARD ON PAGE 41


Page 462002

DECENTRALISED METERINGMULTI CUSTOMER

RISING MAINFROM MAIN SWITCH BOARD

NSH GPC.T.s or Whole Current

MAINISOLATOR

TO INDIVIDUAL CUSTOMERS EQUIPMENT


RISING MAIN FED FROM SW/BOARD ON PAGE 41


Page 472002

RECOMMENDED DIMENSIONSFOR CABINETS/BOXES

ESB 3 Phase80A Fused Cut-out

ESB Single Phase80A Fused Cut-out

M MM

Cut-out Cut-out

CustomerIsolator

EnclosureDepth 200mm

IsolatorESB

IsolatorESB

IsolatorESB

1M

Floor level

TRU

NKI

NG

General Purpose Metering General Purpose & Night Storage Heating

For indoor use in Industrial/Commercial single Customerinstallations

Note: The height from floor level and widths specified are the minimum spacerequired to fit a three phase/ single phase 80A ESB Fused Cut Out•In all cases ETCI rules will apply. Circuits shown are for example only.

Page 482002

USEFUL GENERAL DIMENSIONS

SinglePhaseMeter

3 PhaseMeter

80 AmpTimeswitch

Trunking 100 mm (Min.) Trunking 100 mm (Min.)

Trunking 100 mm (Min.)

150mm

200mm

160mm

230m

m 355m

m

240m

m

For Multi metering Panels

150mm clear space must be left from meter mounting surface to nearest intrusion inside door.

100mm Trunking (min) to be used as indicated

ESB Isolator dimensions:• 3Ph 120 x 115 x 80mm• 1Ph 120 x 70 x 80mm (type 1)• 1Ph 90 x 90 x 80mm (type 2)

•In all cases ETCI rules will apply.

Page 492002

SPACE REQUIRED FOR ESB CABLETERMINATIONS

200 Aor

300 A

300mm Deep

Note : Removable base plate required in order to bend cable into position when terminating.

Preferred OptionWall mounted outside switchboard Minimum space required as below

If required to install in an enclosure Minimum dimensions as below.Please see enclosure base options for cable entry

Option 2Split Base to accommadate cable installation.

Option 1Slotted Base to accommadate cable installation.

Floor level

200A and 300A TERMINATIONS


Page 502002

STAND ALONE CT ENCLOSURE

•CTs shall be enclosed under a sealable cover.•Where this Enclosure is metal it shall be hinged as well as sealable.•Neutral and Earth Bars to be provided in Enclosure.•Note: in Multi CT meter installations, the MINIMUM height above floor level formounting the the CTs is 600mm.•In all cases ETCI rules will apply.

Page 512002

CT CONNECTIONS

E

130mm 110mm 100mm

Supports

Dia.8mm

Dia.8mm

SupportsDouble

For 1 or 2 Cables per Phaseunder 600 Amps.

For 3 Cables per Phaseover 600 Amps

Dia.8mm

Main Protective Conductor Connection

Point

40mm x 10mmTinned Copper


800mm from floor

level

Detail for back to back cable connection

170mm

PROVISION AT CUSTOMERCIRCUIT BREAKER FOR 250/5 and 600/5 CTs

•For angled drops from CB 100mm spacing must be maintained.•Coppers to be mounted with 60mm clearance from back plate•Neutral bar and Earth bar can be accommodated at bottom of enclosure•When this Enclosure is metal it shall be hinged as well as sealable.•Cable connection bolt hole diameter 16mm•CT bolt hole diameter 12 mm•Note: in Multi CT meter installations, the MINIMUM height above floor level formounting the the CTs is 600mm.•In all cases ETCI rules will apply.

Page 522002

CT CONNECTIONS

E

Dia.8mm

Main Protective Conductor

Connection point

800mm from floor

level

40mm

40mm

40mm

130mm 100mm

Double Supports

Double Supports

70mm

150mm


Detail for back to back cable connection

PROVISION AT CUSTOMER’SCIRCUIT BREAKER FOR 1500/5 CTs

•For angled drops from CB 100mm spacing must be maintained.•Coppers to be mounted with 60mm clearance from back plate•Neutral bar and Earth bar can be accommodated at bottom of enclosure•Where this Enclosure is metal it shall be hinged as well as sealable.•Cable connection bolt hole diameter 16mm•CT bolt hole diameter 12 mm•In all cases ETCI rules will apply.

Page 532002

ESB MAIN CONNECTION OVER 300A(200kVA)

PHYSICAL LAYOUT FOR SINGLE CUSTOMER

Space for meter cabinet 600 x 600

100mm x 100mm Trunking

Circuit Breaker

ESB C.T.sC.T. Provision as on

pages 51/52

1.0M

To

1.4M

Wall Mounted Switchboard

Floor level

ESB Termination

Space required for cable make-off

as on pages 51/52

•Separate covers for CTs and CBs•In all cases ETCI rules will apply. Circuits shown are for example only.

Page 542002

Shopping Centres:Experience has shown that Meters fitted inside each unit will inevitablybe covered up by permanent shelving and / or display units.Therefore the only suitable and safe location is a centralisedswitchroom.

Centralised Metering is the preferred method See Page 55.

If Centralised metering cannot be achieved, agreement must besought from ESB regarding metering location.

Commercial/Industrial Units:Centralised metering. See Page 55.

Alternative method: individual connections from ESB network.Page 56 shows mini-pillar application

General

A clear space of 1.2m should always be left in front of ESBequipment.

Standard locking device (8mm Triangular Key outdoor cabinet type)shall be fitted by Customer to provide access to all enclosurescontaining ESB meters/main fuse units.

SHOPPING CENTRES ANDCOMMERCIAL/INDUSTRIAL UNITS

Discussion with local ESB office is essential at the planning stage, at which time the appropriate method of connection/metering will be agreed.

Page 552002

SHOPPING CENTRES orCOMMERCIAL/INDUSTRIAL UNITS

SUPERMARKET

10 11

9

8 7 6 5 4 3 2 1

12 13 14 15 16

Customers Switchgear

Meters here Switchboard

arrangementsPage 41

CENTRALISED METERING

•Centralised Metering is the preferred option.•In exceptional circumstances de-centralised metering will be considered.•Units requiring connection, must be permanently numbered.•Circuit mains connecting each unit must be numbered/labelled at both ends andcorrespond with unit/door numbers.•Sufficient space shall be provided for ESB equipment.•Refer to page 47 and 49 for space required for ESB main Fuse Units.•Refer to page 34 for min/max height of meters.•A clear space of 1.2m shall be left in front of ESB equipment.

Page 562002

COMMERCIAL/INDUSTRIAL UNITSM

ini P

illar

Min

i Pilla

r

Mini Pillar

ESB SUB

ALTERNATIVE METHOD SHOWINGINDIVIDUAL CONNECTIONS FROM ESB NETWORK

•ESB equipment shall be fitted within 2 metres of shop/unit door.•Units requiring connection, must be permanently numbered.•Circuit mains connecting each unit must be numbered/labelled at both ends andcorrespond with unit/door numbers.•Sufficient space shall be provided for ESB equipment.•Refer to page 47 and 49 for space required for ESB main Fuse Units.•Refer to page 34 for min/max height of meters.

Page 572002

GROUPS OF SHOPS/OFFICES

Shopping Unit Shopping Unit

Meters

Office Units Office Units

ESBMini Pillar

FACING ONTO PUBLIC ROADWAY

•The appropriate method of supply and metering will be confirmed by the local ESBdesign office at the planning stage.•ESB equipment will be fitted within 2m of shop/unit door. •Units requiring connection, must be permanently numbered.•Circuit mains connecting each unit must be numbered/labelled at both ends andcorrespond with unit/door numbers.•Sufficient space shall be provided for ESB equipment. •Refer to page 47 and 49 for space required for Cut Outs.•Refer to page 8 paragraph 3C min/max height of meters.•A clear space of 1.2m shall be left in front of ESB equipment

Page 582002

TEMPORARY CONNECTIONS

M RCD

ESBFUSE

IsolatorESB

E

Main protective conductor to main Neutral

Socket to EN60309 standard located outside cabinet.

NOTE: This is the only situation where customer’s equipmentwill be mounted in the same enclosure as ESB equipment

•A surface mounted standard outdoor cabinet is not suitable for temporarysupply.

•Enclosures used to house temporary connections must be made from non-conducting material.

•In a one house situation, the permanently fitted meter cabinet may be used to housethe •temporary connection.

•In a housing estate situation, the permanently fitted meter cabinet in 1st house or aseparate enclosure may be used for the temporary supply.

•All installations must comply with ETCI rules. Circuits shown are for example only.

For larger temporary connections, a suitable enclosure must be provided.Please contact the local ESB office and discuss details.

Page 592002

PETROL STATIONS

Steel Wire Armoured Cable

ESB Network

Pillar supplied by contractor usually located away from pumps at nearest point to roadway.

To Customers Isolating / Overcurrent

Equipment

•See page 47/49 for space required for ESB Main Fuse Unit.•Control of standby generator shall be arranged to prevent generator start-up if mainisolator is switched off for emergency.


Page 602002

STAND-BY GENERATORSManual Changeover

M

E

CustomersMain Switch Fuse

STANDBY GENERATOR

Changeover Switch

ESB Isolator

Main Protective Conductor ConnectionCut-Out

Customers Load

ESB Network

•See page 61 for Auto Change Over installations•See page 62 for standby generator in multi customer situation•In all cases change over must occur after ESB meters•Control of standby generator shall be arranged to prevent generator start-up if mainisolator •is switched off for emergency / maintenance.

•In all cases ETCI rules will apply. Circuits shown are for example only

Page 612002

STAND-BY GENERATORSAuto Changeover

ControlRelay

Mechanical or Electrical Interlock

Main C/B Generator C/B

ESB Network Generator

To Customer's Load

ESB Metering CT's

For Auto Change Over Generator installationsplease see the current ETCI Rules

•See page 62 for standby generator in multi customer situation•In all cases change over must occur after ESB meters•Control of standby generator shall be arranged to prevent generator start-up if mainisolator is switched off for emergency /maintenance.


Page 622002

STAND-BY GENERATORSMulti Customer

C CM

C C

M

M


GeneratorESB

Typical for Whole CurrentMetering

Typical for CT Meteringwith contactors

Typical for CT Meteringwith circuit breakers



Mechanical or Electrical Interlock

For Auto Change Over Generator installationsplease see the current ETCI Rules

•In all cases change over must occur after ESB meters.•If Fire Fighting (F/F) equipment is installed, see page 43.•Control of standby generator shall be arranged to prevent generator start-up if mainisolator •is switched off for emergency /maintenance.


Page 632002

NOTE: It is essential that these requirements are complied with byCustomer/Contractor to ensure prompt installation of ESB supply cables.

All service terminations shall be enclosed within an IP 55 ratedenclosure. Entries into such enclosures must be glanded to maintainIP55 standards.

A JETPROOF (IP55) METER ENCLOSURE (600 x 370 x 200 minimum)is required for one single phase meter (and timeswitch if reqd.). Thisis provided and installed by customer to house ESB equipment. Forother metering arrangement a larger enclosure will be required. Thelocation of the Cabinet should be agreed with the local ESB officebeforehand, whether indoor OR outdoor.

SPECIFICATION FOR STANDARD UNDERGROUND SERVICESUPPLIED FROM OVERHEAD NETWORK A suitable size red electric cable duct to be provided by Customer in a600mm deep (minimum) trench from the meter cabinet to ESB pole. The ductshould have a minimum radius bend of 450mm. The duct should contain a10mm strong draw rope to facilitate the pulling in of ESB service cable.

Warning tape “Electric cables below” should be laid 300mm above the ductinside customer’s property.

The installation of meter cabinet and duct(s) should be in accordance withbest building practices, this code, and ETCI IP standards.

For method of supply to Electric Fences, see Special Situations Layout 4page 71

ABOVE ELECTRICAL INSTALLATIONS REQUIRE IP55 STANDARD TO COMPLY WITH ETCI RULES

Safety Note: Your attention is drawn to the potential danger of workingin close proximity to electric lines. If there is an existing line nearer than25 meters to your proposed building (including TV aerial) noconstruction work should commence until ESB have checked thesituation

AGRICULTURAL/HORTICULTURALPREMISES

Page 642002

REMOTE BUILDINGS

ESBNetwork Pole

WA R N IN GELEC TR IC ITY SU PPLY

C A B LE D U C T B ELO W

Ground Level

INDOOR

IP55 enclosurefor Customers

Distribution Board

OUTDOOR

Meter Cabinetwith IP55 rating for

ESB equipment.

IP55 rated glands

Outdoor: Meter enclosure and rising main cables, where surface mounted should have appropriate mechanical protectection.


Drainage Slot

ESB Approved 50mm Solid Wall MDPE/PVC Red Duct at 600mm Depth

• Standard White Domestic Meter Cabinets are not acceptable for this application.•In all cases ETCI rules will apply. Circuits shown are for example only

Page 652002

In general all installations connected to ESB supply aremetered.

There are, however, situations where this need not apply. In normal circ-umstances, loads not exceeding 2kVA will be considered for unmeteredconnection to supply. At application stage ESB will decide if supply ismetered or unmetered

The majority of special situation un-metered supplies are installed in freestan-ding street furniture (bus shelters, phone kiosks, traffic controls,signs). The most suitable method of installing supply to this type ofinstallation is via a paving vault (see photo) housing an IP 67 ratedenclosure which contains the necessary electrical equipment.

•Preferably, RCDs will be installed. However, some situations may exist where RCDsare not required.


SPECIAL SITUATIONS

ESB Cut-Out Switch Fuse30mA RCD

where required 3 Core SWAESB Network

Earth RodEnclosure

Page 662002

Whereas the preferred option is layout 1 Option A or B, some situationsmay exist where it is not always practicable to apply this layout. The listbelow shows alternative acceptable layouts. See page 65 for electricalcircuit requirements.

TYPICAL APPLICATIONS OF SPECIALSITUATIONS LAYOUT

Type of installation Layout 1 Layout 2 Layout 3 Layout 4

Advertising Hoarding

Advertising Kiosks

Bus Shelters

parking Ticket Dispensers

Electric Fences

Garda Cameras/CCTV

Ice Detecting Stations

Public Lighting

School Signs

Telephone Booth

Telephone Kiosk

Traffic Counting Stations

TV Booster

Water Metering Points

Refurbishment of P/Ls

= Preferred Option = Second Option

Page 672002

SPECIAL SITUATIONS Layout 1Option A

Photograph 1

Photograph 2

Photograph 3

Photograph 1 shows the paving vault in situ. at phone pedestal.Photograph 2 shows main fuse unit, 2A MCB and a 30mA RCD all of which areenclosed in an IP67 unit. (See page 68 for alternative type of enclosure).Photograph 3 shows a paving vault before being set into footpath.From a safety point of view, this layout is the most suitable for free standing streetfurniture.

Page 682002

SPECIAL SITUATIONS Layout 1Option B

The photographs show an alternative IP67 rated enclosure.Note the use of glands to maintain IP rating cable entriesThe electrical equipment shown in the enclosure comprises of ESB cut-out andappropriately •rated RCBO

Page 692002

SPECIAL SITUATIONS LAYOUT 2

Photograph 1

Photograph 2

Photograph 3

These photographs show an alternative method of providing supply in specialsituations this method is suitable for wall mounted installations such as advertisinghoarding, TV Boosters etc.

The enclosure used in this situation is IP 54 rated.

Photograph 1 shows street security camera fed from this type of installation.

Page 702002

There should be a separation of at least 2 metres between the ESB Mini Pillar and the Customer’s Micro Pillar

The purpose of this requirement is to avoid conflict and ensure segregation betweenthe ESB cable vault/ducts and the public lighting ducting e.g. the public lightingcircuits cannot pass through the mini pillar cable vault. Note: This distance may be reduced if segregation is ensured. In thissituation the Mini Pillar and Micro Pillar must be cross bonded.

•The main areas of use for this type of layout are public lighting installations. Micropillars may •also be used for other installations. See page 66.

•This layout uses a mini-pillar or micro pillar to house the electrical equipment.•The above photographs show suitable enclosures for three phase Cut Out andsingle phase Cut Out connections. For larger capacities a suitable enclosure shallbe provided. See pages 47 and 49 •for enclosure dimensions.

•In refurbishment of existing public lighting installations supply may be housed in thefirst Column.

•ETCI Part 714 “Particular Requirement for Public Lighting Installations” is thereference •document for Public Lighting installations.


Customers Main Fuse (25 Amp16kA Breaking capacity)

Main Protective Conductor

Protective earth connectedto frame of Mini-pillar

Main Earth Terminal

ESB Standard Cut-out

Earth Electrode

N

Cable to columnConnection from ESB Mini-pillar

ESB Isolator (where required)

Customer Public lightingMini Pillar

Customer Public lighting Micro Pillar

Page 712002


5 M

ESBNetwork Pole

(Existing)

ESB Supply and fitIP55 Enclosure

ESB Cut-out with5A Fuse or MCB.Neutralising here

IP55 Gland

IP55Enclosure

For customersequipment

3 x 2.5 sq mm SWA (Max)or similar

Cable guard required for mechanical protection

Radius

450mm

E

25 M from ESB pole to Customers Earths

WARNINGELEC TR IC ITY SUPPLY C A B LE D U CT BELO W

IP55 Gland

Drainage Slot

Note: Red cable ducting is unsuitable for overground use


ESB Approved 50mm Solid Wall MDPE/PVC Red Duct at 600mm Depth

•Customer to provide suitable enclosure to house customer equipment.•Customer to provide duct from ESB pole to customer’s enclosure ( as per sketch)•Glands to be used to maintain IP rating of enclosures.•White Domestic meter Cabinets are not acceptable for this application.•In all cases ETCI rules will apply. Circuits shown are for example

Page 722002

In processing the application for connection the ESB will, in consultation withthe customer, specify the voltage level of the connection

New loads in excess of 500kVA will in general be supplied at MediumVoltage. Medium Voltage refers to10KV, 20KV and 38KV. This documentrefers to the standard connection requirements for 10/20KV.Connections at 38KV will be dealt with on an individual basis by ESBdesign office

If connection is to be made available at MV the following information willfacilitate the consultant / customer in pursuing the application for supply.

• The customer’s installation must comply with S.I. 44 (1993).

• ETCI are currently developing requirements for MV connections, shouldthere be any conflict between this document and documents produced byETCI, ETCI documents shall prevail.

• ESB Specification 13320 “General Specification for MV substations”.(available from ESB)

• ESB document: “Conditions Governing Connection to the DistributionSystem for Medium Voltage Connections.”( available from ESB)

• ESB Document “Medium Voltage - Dual Radial Supply.” ( available from ESB)

The above ESB documents list out ESB requirements relating to MV customersand the following points should be noted:

Procedure

A meeting to co-ordinate arrangements for energising the connectionshall take place at least 5 working days before supply is required.Contractor/s involved in the construction and commissioning of the MVequipment shall be represented at meeting.

REQUIREMENTS FOR CONNECTIONAT MEDIUM VOLTAGE (MV)

Page 732002

The following shall be provided to ESB at least 2 working days beforeenergisation is required :

(a) Primary and Secondary Test Sheets for the Main Incomer Circuit Breakers Protection Relays .Primary tests to be completed on site.

(b) Confirmation of customers protection relay settings controlling the main incomer circuit breaker .

(c) Details of ratio of customer's protection CTs and protection relay type.(d) Earthing has been installed as per requirements(e) MV Completion Certificate. (f) A declaration of fitness certificate for the MV installation that is to be

connected to the ESB MV system.This will normally be the final document given to ESBimmediately before the connection is energised, and shall state thatthe proposed MV system is fit for service from a safety, technical andoperations perspective.

(ETCI are currently developing a completion certificate for MV installationand until such time as this is available the declaration of fitness certificatereferred to at (f) is acceptable. When the ETCI certificate is developed itwill take the place of the declaration of fitness certificate)

OPERATION

In the interests of safety, access to the customer's medium voltage switch room shall be restricted to competent personnel only. Operation and maintenance of the customer's equipment shall be carried out by fully trained and competent personnel.The customer's switch panel shall indicate clearly the connection sequence of all equipment connected to it.A durable Single Line Diagram shall be mounted in the customer's switchroom in a prominent locationOperating procedures shall be agreed between local ESB and customer.


Page 742002

EARTHING REQUIREMENTS

Earthing facility required on main incomer cable.Consult S.I. 44 for earthing requirements on the customer side of the mainincomer circuit breaker

CABLE TERMINATIONS

The main incoming terminals to the circuit breaker shall be suitable forterminating three single core cables, XLPE insulated and black PE(polyethylene) sheath overall.

Customers shall confirm with ESB the configuration and size applicable totheir particular installation.

The customer or his agent shall provide suitable terminating kits forconnection of the above cables to the main incoming terminals of the circuitbreaker.

Adequate space shall be provided in customer’s switch room to enable ESBstaff to work on cable terminations.

METERING

Space shall be provided for the MD Metering Cabinet as indicated by ESB


MV Customers Page 752002

10/20KV SINGLE TRANSFORMER

MV Metering Cubicle

Customer Owned Main Incomer C.B.Customer A

T.1

Main L.T.C.B.

ESB

MV

Bus-

Bar

No. Required by Requirement

1. ESB Earthing facility required on main incomer cable

2. S.I. 44 Consult S.I. 44 for earthing requirements on the customer side of the main incomer circuit breaker

Table 1. Earthing Requirements on main incomer circuit breaker

ESB MV Substation Customer’s MV Switchroom


10/20KV MULTI TRANSFORMER

MV Metering Cubicle

Customer Owned Main Incomer C.B.

T.1

Main L.T.C.B.

Customer A

T.2

Main L.T.C.B.

Generator

Cus

tom

ers

MV

Bus-

Bar

ESB

MV

Bus-

Bar





ESB MV Substation Customer’s MV Switchroom


10/20KV DUAL RADIAL CONNECTION

MV Metering Cubicle


T.1

Main L.T.C.B.

T.2

Main L.T.C.B.

MV Metering Cubicle


MV Feeder 1

MV Feeder 2

Customer Owned Coupler / C.B.

Customers MV Switchroom





Page 782002

DECLARATION OF FITNESS FOR SERVICE

To: Distribution System Operator, ESB

Customer Name : ___________________________________________

Address of Installation : ___________________________________________

: ___________________________________________

DETAILS OF INSTALLATION:

Reference No. (Job ID, ZGC OR MPRN.) _____________________Supply Voltage _____________________Number of circuit breakers (at supply voltage) _____________________Length of cable (at supply voltage) _____________________Number of Transformers (at supply voltage) _____________________Other Equipment (at supply voltage) _____________________Relay Settings (main incomer circuit breaker) _____________________

Generator installed capable of operating in parallel with ESB Distribution system Y/N _____________________

CERTIFICATION:I certify that the MV electrical installation at the above address has been inspected and testedand complies with the relevant requirements of part VIII of S.I. 44. 1993. I also confirm that theinstallation complies with the Distribution Code and is fit for connection to the ESB System.

___________________________________________________________Signature of Customers Contractor/Technical Representative.

___________________________________________________________Name of Company and Position within Company.

_______________Date.

Page 792002

SYMBOLS

M

3 PHASE200/300 AMP

M

COLOUR CODING USED THROUGHOUT BOOK

SUPPLIED BY ESB SUPPLIED BY CUSTOMER

ESB METERESB

TIMESWITCHESB ISOLATOR

METER

CURRENT TRANSFORMER

SWITCHFUSE/MCB FUSE ISOLATORMAIN CIRCUIT

BREAKER

Rel

ay

ESB CUTOUT ESB CUTOUT ESB CUTOUT

3 PHASE 80 AMP

1 PHASE 80 AMP

RELAY

SPECIAL ESB ISOLATOR

Documents

National Code of Practice 3rd Edition