cpc

  1. P

    class 1 light fitting with no cpc

    Been asked to swap over a class 1 fitting for another old existing class 1 on a first floor hallway - however there is no cpc on the light circuit! (early 1960s house). In the loft there is a rfc junction box close at hand. What about putting a 4mm g/y single from the light fitting to the J.B...
    • pushrod
    • Thread
    • class class 1 cpc fitting light no cpc
    • Replies: 1
    • Forum: UK Electrical Forum
  2. B

    sizing SWA armour as cpc using adiabatic......

    I'm doing a mod for a 3 phase circuit already installed. The only trouble is I can't work out why the existing cables are as they are so i am doubting my sums. Existing final circuit. 3 pole memshield 2, D32 rated feeding 10mm2 4 core swa with a seperate 16mm2 G/Y as cpc. Measurements at the DB...
  3. S

    minimum cpc sizes

    Just running thro some design calcs for minimum cpc size and im getting some unrealistic readings. Example 1.5mm c.s.a live and 4.mm cpc on a lighting circuit?? circuit is Zdb = 0.083 Circuit 1L1 Assuming we can use 1.5mm cpc R1 + R2 = (12.10 + 12.10) x 1.2 x 3.57 / 1000 = 0.10ohms...
  4. 1Justin

    no CPC on lights, - switches for class 2?

    I'm looking at the options for customer who has no CPC on lights as is quite common. I know the ESC "good practice guide" - and that all makes good sense. However most light switches with exposed screws into metal back boxes (where metal box is unearthed because no CPC), would therefore be...
  5. P

    Board change with no cpc on lighting

    Hi all Been asked to quote for a board change. Had a quick look round the place and discovered lighting circuit has no earth. Where do I stand on this? Current board is 3036s and will be replacing with rcbos as wiring is quite old. Will also be bonding the gas and water from 4mm to 10mm.
    • Paul117
    • Thread
    • board change circuit cpc electrical guides lighting no cpc practice sticker
    • Replies: 22
    • Forum: UK Electrical Forum
  6. 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
  7. 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...
  8. 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...
  9. 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...
  10. 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
  11. 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
  12. 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
  13. 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...
  14. 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.
  15. 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.
  16. 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
Best EV Chargers
Best EV Chargers by Electrical2Go! The official electric vehicle charger supplier.

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

Advert

YOUR Unread Posts

Advert

TrueNAS JBOD Storage Server

UK Tiling Forum | Tilers Forums
UK Tiling Forum by Tilers Forums UK
Plumbers Forums | Plumbing Advice | Gas Forum
Electrician Tips from Professional Electricians
JBOD Forums: a forum for JBOD storage server advice
JBOD Suppliers: JBOD Storage Server Supplies
Back
Top