cpc

  1. Steve93

    Running cpc with swa and not use the swa as cpc

    why do people run a cpc Along side the armoured that supplies the board. Why not use the metal sheathing as the earth?
  2. D

    Mains distribution upgrade work, 3 phase,old isolators, steel conduit & trunking providing CPC

    Hello everyone I'm picking up some remedial works from an EICR fail in a commercial property. Its a 3 phase supply with old steel conduits , trunking & coupled metal equipment, that provides the earth to the various locations. At present the earthing is insufficient, every earth in the...
    • Delectrician
    • Thread
    • conduit cpc distribution electrical work isolators mains old phase steel steel conduit trunking upgrade work
    • Replies: 9
    • Forum: UK Electrical Forum
  3. Michaelwgroves

    Using adiabatic equation for CPC on SWA

    I want to use the armour as my CPC but need to check it complies. The cable will be run from a SP Distribution panel to CU. As per Selection and Erection Guidance Note 1 table D10a I can see a 10mm XLPE SWA requires a 31.1mm csa to comply, but only has 26mm on 2-core. 20171231_114229828_iOS.jpg...
  4. J

    tapping into conduit wiring with no singles cpc

    Afternoon guys Got a job my builder wants me to do in nice block of flats up town solid concrete ceilings/walls/floors unfortunately! lighting is just staying as is- but them want extra sockets added and a new 5amp socket circuit for lights the existing sockets are wired in single in tube in...
  5. O

    No CPC on lighting circuit ............

    OK, lets have a decent discussion about this as I'm sure there will be a number of opinions! Have done an EICR on a 40 + year old flat. The lighting circuit is wired in singles and utilises the steel conduit as the CPC. Out of the 6 lights and using my R2 wander lead, only 2 have an acceptable...
  6. T

    No cpc to lighting circuit, no rcd protection 50 year old wiring

    Hi just thought I'd throw this out here for a bit of light entertainment after the @Marvo thread (phew!) So brother in law asked me to look at EICR which returned unsatisfactory. I have not looked at the installation to ascertain as to Class 1 or 2 fittings in the premises are installed. The...
    • The Ghost
    • Thread
    • circuit cpc lighting lighting circuit no cpc no rcd old protection rcd wiring
    • Replies: 30
    • Forum: UK Electrical Forum
  7. S

    CPC size of SWA Armouring

    Evening, Just joined upto this forum after a search online for some info, hopefully someone can help me? I have taken over a job from another contractor who has run in a 50mm 4 core swa from a substation to a TP&N DB roughly 100m away. My concern is that it appears they have not run a separate...
  8. D

    Metal Light Switch + Plastic Back Box with no earth terminal

    I've tried to find a solution on here to this exact scenario but had no such luck. Could somebody please advise on where I should place the earth wire on a plastic back box with no earth terminal when adding a new metal face plate? The face plate has an earth terminal on it and was probably...
  9. T

    Adding to existing lighting with no CPC

    Hi everyone, I am currently installing an additional 4 way CU which is to serve a new extension on the customers house. They have also asked me to alter one of their existing 2 way stairs lighting so that they can have an intermediate switch incorporated (a switch at either end of the upstairs...
  10. Andy-1960

    Seperate / Integral earth CPC on 400A supply

    This one might get the old grey matter going! 400A supply 260m run on ladder fed from BS88 fuses to sub main distribution board. Did a cable calc using our Trimble software (was Amtech) and looked at the option of using an integral earth or a separate earth so I could use a conventional 4c...
  11. J

    EICR code Split cpc on ring final circuit

    lost continuity on cpc of ring circuit, live and neutral fine all test fine. C2,C3,FI ?
  12. C

    E27 pendant no cpc down to metal fittings

    hello guys Client has bought fitting from online, metal cable cap at top with single twin flex dropping down to an e27 pendant with metal casing and no earth. I'm saying client can't use them what's your thoughts?
  13. S

    CPC screwdriver special offer

    For anyone interested CPC have a Wera 7 piece VDE Insulated screwdriver set on offer @ £12.98+ vat
  14. D

    CPC Size & Max Permitted Zs

    Looking through our periodic certificate that was completed by a 3rd party, I've got a few queries that hopefully someone on here can clarify. We've got a Schneider Prisma switchboard (S3/MSP 3.1) fed from 11kV/400V Transformer. - What is meant by MW for cpc size of 2/TP and 13/TP? - Is there...
  15. M

    EICR for a rented property with cpc on the lights.

    I have a EICR coming up where I am sure there is no CPC in the lighting circuit, the property is rented and I am sure all the outlets are class 2. Where do i stand? Should the circuits be rewired? C2 or C3? Thanks
  16. P

    Testing

    Does it matter which method (method 1 or method 2) you use when testing for continuity of the circuit protective conductors? Or is each method dependent upon which the type of circuit you are testing on ring or radial? I have been told that test method 1 is used for lighting and radial...
  17. P

    Continuity Tests

    Is the continuity test for circuit protective conductors, the same test for ring and radial circuits or is there a different test for each type of circuit? Also what is the difference between testing for cpc continuity and testing for continuity for ring final circuit conductors?
    • PLW
    • Thread
    • circuit conductors continuity cpc earthing ring circuit testing testing and commisioning tests
    • Replies: 1
    • Forum: UK Electrical Forum
  18. P

    Continuity Tests

    Is the continuity test for circuit protective conductors, the same test for ring and radial circuits or is there a different test for each type of circuit? Also what is the difference between testing for cpc continuity and testing for continuity for ring final circuit conductors?
  19. G

    Help with CPC size

    Hi I am training to become an electrician. I have a problem to solve to work out the size of the CPC. My calculations say I would use 6mm and 1mm CPC. This can't be right, can it? Please refer to attached document for details.
  20. S

    Do I need to be a member of a CPC to sign of commercial works?

    Hi, I am a little confused and hoping for some help. I am a qualified JIB gold card spark and work with a friend (also qualified spark) as sole traders, we have subcontracted to company's for the last say 5 years doing commercial electrical and fire alarm installations. Now we are looking...
    • smity
    • Thread
    • alarm commercial cpc electrical member niceic sign works
    • Replies: 6
    • Forum: Business Related
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