Central Earth Terminal (CET) for Steel Wire Armour (SWA) Cable Termination of Street Lighting Cables

Published 13 Feb 2019

Charles Endirect LTDCentral Earth Terminals CET

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Central Earth Terminal (CET)

Earthing System For SWA Wire Armoured Cables | Cable Glands & CETs

Thorne & Derrick International, based in the UK, continue to supply CET Central Earth Terminal cable gland plates to street lighting contractors for the termination and installation of BS5467 Low Voltage XLPE Insulated SWA Armoured 600V/1000V power cables.

The CET Earthing System is specified for the termination and bonding of all sizes of SWA armoured cables into confined spaces of street furniture – typical applications include street lighting columns, feeder pillars or traffic signs.

CET002  &  CET003

The CET Central Earth Terminal is available in 2 designs – the CET002 and CET003 series of earth terminals offer an inherently strong and simple design which exceeds the BSI (Cable Gland) torque test, manufactured exclusively in zinc plated solid brass.

CEL offers a comprehensive range of earthing components that cater for all standard size armoured cables – the terminals are easy to use and install by the street lighting engineer.

All wire armour cable terminations are “made-off” from the front without the need of a spanner providing an effective earth bond.

Earth Terminal CET002 Splayed

CET002 Terminal

The Charles Endirect range of earthing terminals includes compression glands, CET’s, saddles, terminal blocks and gland plates for the earthing and bonding of all steel wire armoured (SWA) street lighting cables.

Pictured: Earth Terminal CET002 – shown terminating wire armoured cables with the armours in the splayed position.

Cable Glands BW CW

The CET system is complemented by a full range of BW brass cable glands and CW brass glands to BS6121 and stand off gland plates as well as the solid brass earth blocks – EB42 – frequently used on street furniture backboards.

  • BW20, BW25 and BW32 Cable Glands

    Earth Terminal CET002

    CET002 Terminal

  • CW20, CW25 and CW32 Cable Glands

Fuses

CEL together with T&D stock and supply street lighting fuses to IEC 60269 (BS88), including LD (230V) and MD (400V) and LST (230V) versions of all current ratings.

These fuse sizes are designed to match up with CEL street lighting isolators and street lighting cut outs and can be supplied fitted to special order along with the pre-wiring of cable tails.

Pictured: Earth Terminal CET002 – shown terminating wire armoured cables with the armours in bent back position.

Charles Endirect Earthing Components​

CET Central Earth Terminal

Earth Terminal CET003 Splayed

CET003 Terminal

CET (Central Earth Terminal) is the established street lighting industry standard for “stand-off” cable glanding and termination of XLPE insulated cables with steel wire armour (SWA) cables up to 70sqmm cross section area (circular stranded copper).

CET is an inherently strong and simple earthing design for single or multiple earth take-off points to suit all XLPE/SWA cables – designs allow splayed or bent steel wire armours using zinc plated solid brass terminal components.

SWA earthing glands are used by street lighting and traffic signal companies – the cable glands meet and exceed the BSI torque test for excellent electrical installation practices and earthing integrity.

Pictured: Earth Terminal CET003 – shown terminating wire armoured cables with the armours in the splayed position.

Central Earthing Terminals ​CET Advantages

  • Inherently strong and simple design
  • Exceeds BSI (Cable Gland) torque test
  • Main terminal components are all zinc plated solid brass
  • No loose fitting or easily omitted strands
  • Single or multiple earth take-off points
  • Comprehensive range, all standard cable sizes
  • Supplied complete with jubilee clip

    Earth Terminal CET003 Bent Back

    CET003 Terminal

Pictured: Earth Terminal CET003 – shown terminating wire armoured cables with the armours in bent back position.

A comprehensive range of Earth Terminals for bent back or splayed configuration termination of the wire armour of street lighting cables – single, double or triple earth saddles are available to install CET002 and CET003 to the equipment backboard.

Stand-off cable gland plates are also available manufactured from 2mm thick brass with fixing gland hole options to suit the installation – complete range of Street Lighting Equipment available including isolators, cut-outs, feeder pillars and solar belisha beacons.

Central Earthing Terminals

Street Lighting

CEL Central Earthing Terminal Max Cable Size Accepted

➡ The following table enables the selection of the correct CET earth terminal to terminate and gland multicore (2, 3 or 4) core armoured power cables:

SWA Wire Armours Bent Back Cables
Cable Size 2 Copper Cores 3 Copper Cores 4 Copper Cores
2.5sqmm 002/6 002/6 002/6
4sqmm 002/6 002/6 002/6
6sqmm 002/6003/10 002/10003/10 002/10003/10
10sqmm 002/10003/10 002/16003/16 002/16003/16
16sqmm 002/16003/16 002/16003/16 002/35
SWA Wire Armours Splayed Cables
Cable Size 2 Copper Cores 3 Copper Cores 4 Copper Cores
2.5sqmm 002/6 002/6 002/6
4sqmm 002/6 002/6 002/6
6sqmm 002/6003/10R 002/6003/10R 002/6003/10R
10sqmm 002/10003/10R 002/10003/10R 002/16003/16R
16sqmm 002/10003/10R 002/10003/10R 002/16003/16R
25sqmm 002/16003/16R 002/16003/16R 002/35003/35R
35sqmm 002/35003/35R 002/35003/35R 002/70

 

BW Cable Gland Selection Chart

BW Cable Gland

Standard brass compression glands to BS6121.

Suitable for SWA cable, complete with brass lock nut and PVC shroud. Will accept cable with maximum overall diameter as follows:

➡ The following table enables the selection of the correct BW Cable Gland to terminate and gland multicore (2, 3 or 4) core armoured power cables – the brass cable gland provides mechanical cable retention and termination of the steel wire armour up to 600V/1000 volts.

For the termination and cable crimping of the stranded copper cable conductors refer to the Cembre range of cable lugs.

Cable Size sqmm 2 Core Cables 3 Core Cables 4 Core Cables
1.5sqmm BW20 BW20 BW20
2.5sqmm BW20 BW20 BW20
4sqmm BW20 BW20 BW20
6sqmm BW20 BW20 BW20
10sqmm BW20 BW20 BW25
16sqmm BW25 BW25 BW25
25sqmm BW25 BW25 BW32
35sqmm BW32 BW32 BW32

Earth Terminals

Thorne & Derrick International

LV, MV & HV Jointing, Earthing, Substation & Electrical Eqpt

Thorne & Derrick International are specialist distributors of LV, MV & HV Cable Installation, Jointing, Duct Sealing, Substation & Electrical Equipment – servicing UK and global businesses involved in cable installations, cable jointing, substation, overhead line and electrical construction at LV, 11kV, 33kV and EHV.

THORNE & DERRICK Product Categories: Duct Seals | Cable Cleats | Cable Glands | Electrical Safety | Arc Flash Protection | Cable Jointing Tools | Cable Pulling | Earthing | Feeder Pillars | Cable Joints LV | Joints & Terminations MV HV 

Further Reading