cpc

  1. 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 old protection rcd wiring
    • Replies: 30
    • Forum: UK Electrical Forum
  2. 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...
  3. 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...
  4. 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...
  5. 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...
  6. 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 ?
  7. 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?
  8. S

    CPC screwdriver special offer

    For anyone interested CPC have a Wera 7 piece VDE Insulated screwdriver set on offer @ £12.98+ vat
  9. 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...
  10. 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
  11. 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...
  12. 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
  13. 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?
  14. 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.
  15. 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
  16. codger

    Missing cpc in domestic lighting circuit

    Morning. A friend and I have been carrying out some EICRs on properties in our area. Recently, my mate has come across two houses in which the lighting circuits do not have any earthing at all. They have been run in twin and earth but the earths have all been snipped off at lighting points...
  17. J

    Shock overcurrent ignored in recommendations?

    It is my reading that doing impedance tests we like a nice low resistance in theory overall and especially for earth , both Ze and R1 or both R1 and/or R2. This makes a high potential fault current Uo/Ze, way above the allowed fuse sizes for a light circuit or many power too. So do wires really...
    • jimny
    • Thread
    • cpc learning overcurrent question recommendations shock
    • Replies: 10
    • Forum: The Welcome Forum
  18. akwoody2

    Sharing Cpc - Two Lighting Circuits

    Hi Chaps, Carried out a condition report today and found two lighting circuits using the same CPC, 4mm single. Seems the lighting never had a CPC and someone has added the 4mm at a later date. From what i understand the 4mm is ok but is it ok for two circuits to share the same CPC? Thanks in...
    • akwoody2
    • Thread
    • circuit circuits conduit cpc lighting share sharing system
    • Replies: 9
    • Forum: Lighting Forum
  19. S

    Swa Cpc

    Sintra submitted a new resource: SWA CPC - SWA CPC Read more about this resource...
  20. bigspark17

    Submain 16mm t&e cpc chopped

    EICR.. 80 switch fuse in meter cupbord, 16mm t&e to cu with 6mm cpc chopped both ends and 16mm earth ran along side submain. zdb/pefc/pscc fine. bonding from db fine. i would never do this but struggling to find a reg number aggainst it :/ opinions appreachiated
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