cpc

  1. K

    Continuity of CPC at Ceiling Rose

    Had to leave a job early tonight, so couldn't resolve what should be a simple issue, but now it's buzzing round my brain. I have 5 ceiling rose's and pendants in a good old loop system. All 1 Way. I have good continuity readings at rose numbers 1,2,3 and 5. I have good continuity...
    • KingKenny
    • Thread
    • ceiling connection continuity cpc issue reading rose switch
    • Replies: 20
    • Forum: UK Electrical Forum
  2. P

    Old single sockets, unsheathed cpc.

    Hi all, looked at a job today to replace 5 x single sockets to 5 x doubles. Looks like the CCU was changed maybe 4 or 5 years ago but no paperwork - the property has the old wiring in place - red, black and unsheathed cpc. The single sockets are only 4 inches from floor level so i will need to...
  3. BigSi

    NICEIC Certification Scheme NICEIC’s Connection magazine (using CPC as a live conductor)?

    I was reading the latest issue of the NICEIC’s Connection magazine, when came across an article about wiring extractor fans. I didn’t read it in depth (was in the library at the time!!!), but from what I can gather you can now use the cpc in a flex (flex only, not hard wired) as a live conductor...
  4. K

    Who need cpc continuity?

    Was helping a fiend to change some socket outlets, standard white to brushed steel in her kitchen. She only had the house re wired 2 years ago - got the part P paperwork. This is what we found behind one socket. WTF was the bloke thinking?? Also obviously doesn't bother with grommets. I also...
  5. L

    Use of cpc as a live conductor - EICR Coding

    Fella's I'm just writing up an EICR from last month, one of the findings was a lighting circuit on the non RCD side of the board where the cpc was used as a strapper in 2 way light switching, Ive marked it as C2 for two reasons, one being that there is no longer a cpc in the cable and also that...
    • LlandrilloSpark
    • Thread
    • cable coding conductor cpc eicr however insulation live practice schedule
    • Replies: 16
    • Forum: UK Electrical Forum
  6. S

    CPC - Neutral Fault

    Hi Ive just changed a Consumer board and fitted a Wylex split load,5 Rcbo's one side and 4 Mcb's on the Rcd side. After connection of all conductors (all in correct terminals) it turns out one leg of my ring has a faulty Cpc, i've carried out an IR test and there's an issue with the neutrals &...
    • stones4
    • Thread
    • circuit cpc fault faulty neutral outlet split
    • Replies: 18
    • Forum: UK Electrical Forum
  7. J

    Calculate the min size of cpc giving consideration to disconnection times and thermal

    Hi everyone, On the drawing it says the system's TN-C-S with declared Ze = 0,008 Ω and prospective fault current declared as 50kA When I calculate If = Uo / Zs = 230 / 0,716 = 321 A . With this value there's no way to match with 10A curve at fig. 3A6 (appendix 3) But if I calculate the...
    • JuniorSparky
    • Thread
    • calculate cpc disconnection disconnection times size thermal times
    • Replies: 28
    • Forum: UK Electrical Forum
  8. N

    In what context do you use a CPC?

    Gentleman, Im reading through the forums, especially the fault finding threads in this sub and there are a lot of talk about CPC's. when someone has time could you please explain what a CPC is and when it is used? im sorry if this sounds like an amateurish question but its because at this...
  9. M

    cpc

    Hi guys. Correct me if I'm wrong your cpc and earthing conductor should be no less than half the size of your line conductor.
  10. M

    15v on cpc

    Hi all I'm struggling to get my head round while I'm getting 15v on the ring main cpc, but when I turn the lighting circuit off it drops to 0v can any1 else work this out.
  11. B

    Equivelent CPC sizes for metal trunking

    Hi Im looking for a table that gived the equivelent cpc that a metal trunking would provide. many thanks,
    • benieb
    • Thread
    • cpc metal sizes table trunking
    • Replies: 1
    • Forum: UK Electrical Forum
  12. TaffyDuck

    Voltage on CPC from PV Array.

    Hi Guys I wonder if someone with more experience of PV might be able to give me some advise. Was called out today to a domestic building with a remote barn on which a 4kW PV array is sited. The Inverter is in the barn and a long (50m) 2.5mm twin and earth in pipe (historic) feed back to the...
  13. W

    No cpc to lighting circuits

    Went to change a light for a local estate agent today, No cpcs to the lighting circuit would i right right if i said the circuits would have to be rewired?
    • Welshsparky
    • Thread
    • circuit circuits cpc light lighting metal
    • Replies: 15
    • Forum: UK Electrical Forum
  14. B

    Final ring circuits with radial CPC

    Have justed looked at a job to replace the consumer unit and it appears that both the final ring circuits ( Kitchen and the rest of the Flat ) have Radial CPC's. The flat is wired in multicore Singles and Plastic Conduit , has anyone come across this type of design before. Both "ring circuits"...
  15. Rockingit

    6mm integrated CPC of 16mm 6242Y used for main earth

    My adiabatic maths says that for a 16mm main conductor, assumed Ze of 0.2, 80A 88:3 CPD, k as 115.... the earth only needs to be 3.16mm therefore the 6mm in a 6242YH 16mm is more than sufficient. Anyone disagree?
  16. S

    Consumer Unit Change - No CPC on lights - Borrowed earth

    Been asked to change a consumer unit On inspection found out that customer had done much of the work himself - approx 20 years ago Currently has old Wylex NN Board Ring Mains & Kitchen appear OK - T&E Lights have no cpc, except for a couple with metal fittings. The lights with metal...
    • SB-LEC
    • Thread
    • borrowed change consumer consumer unit cpc earth lighting lights unit
    • Replies: 16
    • Forum: UK Electrical Forum
  17. B

    Insulation resistance testing with no cpc

    When doing a CU change and lights have no cpc. Every room has class 2 dimmers and lights. ceilings are like 20 foot tall. How would you guys go about Insulation testing? L&n to cpc ain't an option and removing all lights and bypassing dimmers is consequently going to take some time... What would...
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