cpc

  1. S

    bizzare Line to CPC fault on lighting circuit

    Hi people Maybe somone can give me some pointers, Generally with faults i'm pretty good but this one has got me stumped! I was working in an old house that the owner required some modernising, so we did a kitchen and moved and added few lights and switches around as you do. The board was an old...
    • sparks monkey
    • Thread
    • circuit cpc fault lighting lighting circuit
    • Replies: 18
    • Forum: UK Electrical Forum
  2. M

    Lighting CPC

    Excuse what may be an obvious question here fellas, so I apologise, but I'm having a real brain fade after a bit of a trying couple of weeks at work (other work, not 'here')......A customer has requested that I install 3 x 12v downlight fittings to a small ensuite. My question is that as that...
  3. B

    conduit used as cpc

    Hi all again I'm doing another condition report for a property, no cpc for sockets, cooker lighting, what's the best way to test continuity, I'm thinking of doing the same way as R1+ R2 line to earth terminal, also would you record results in r2 box or R1+ R2 box, I'm having a bad day
    • Buzz-light-bulb
    • Thread
    • conduit cpc doing earth property terminal used
    • Replies: 5
    • Forum: UK Electrical Forum
  4. NDG Elecs

    Link between N - CPC on fluorescent... what is it?

    Hello folks, I hope the picture shows ok. If it does not show, then basically there is a blue disc approx 25mm in diameter that may have a resistor or something in it. It is approx 4mm ' thick'. The blue disc is linking between neutral and earth on the fitting. Never noticed these before...
  5. spud1

    Voltage on a CPC?

    Hi everyone, Hopefully someone can help me with this?! I am in the throws of finishing a domestic rewire in an empty house this week and yesterday was re-sleeving some CPC's in pendant light fitting that my apprentice had sleeved poorly. Rather naughtily I was doing this while the pendant was...
  6. L

    no cpc / earth connection available on lights

    and here's how it was overcome................... this was found AFTER rewire when the ceiling was dropped....................no certificates funnily enough!
    • lister
    • Thread
    • available connection cpc earth lighting lights no cpc
    • Replies: 22
    • Forum: Talk Electrician Forum
  7. M

    Seperate CPC out to garage - duct or not to duct?

    Hello there. I'm forever looking over these forums looking for advice, and typically I always find an answer, except it seems in this one instance - which is what brings me on my merry way to here today. I was thinking of running a new supply to the garage. Problem is it has a water pipe (only...
    • munty12
    • Thread
    • cpc duct garage out seperate
    • Replies: 19
    • Forum: UK Electrical Forum
  8. W

    swa and seperate cpc problem

    Is it a requirement of 17th edition to run a seperate Cpc with a 4core 3phase supply ? ?
    • warren brown
    • Thread
    • cpc problem seperate swa
    • Replies: 18
    • Forum: UK Electrical Forum
  9. D

    connections of cpc

    hi, Testing a job at the moment and a couple of DB have all there CPC connected in the trunking instead of the DB. There is a earh bar within the metal trunking but due to the trunking full of cables, unabale to gain access to the CPC. Due poor access to the CPC ive made a report on that but...
  10. M

    RCD operation with no lighting circuit cpc

    Can someone tell me if an RCD or RCBO, 30ma, will trip on earth leakage if a fault occures from live to the metal case of a switch where no cpc is present ? I think it will as the RCD is looking for an imbalance between line & neutral and this will occure if a person touches the metal switch and...
  11. P

    120v between cpc and earth bar !

    I was carrying out an r1+r2 today and when disconnecting the cpc out of the earth bar to link worth the line it sparked on removal from the earth bar.... I tested between the cpc and the earth bar and got 120v Tncs earthing arrangement I've carried out insulation resistance test and that was...
  12. C

    Voltage up to 100v on CPC even when disconnected

    Hi I've never posted in one of these forums before, but have read lots of threads and found them extremely helpful. So it makes sense seeing as I know the knowledge on this sight is very impressive to ask you guys for help. I have a problem with a job and can't work out what the problem is I've...
  13. R

    no cpc continuity on ring final, strange readings !

    Good Evening all, Been at a property today starting intial tests for a board change tommorow. There are two ring circuits, on one of the ring circuits i had an open circuit on the cpc. Live and neutral where fine 0.4/0.4. I started to locate the break by splitting the legs and joining the live...
  14. S

    SWA Testing cpc continuity!

    Hello just wondering if anyone could help me! I have to test a circuit tomorrow wired in SWA that is using its armoring as its earth, To carry out the R1+R2 test how would i eliminate any parallel paths? Surely the only real way to do this would be to remove the cable from the side of the metal...
  15. W

    No CPC

    Hi all, A customer wants me to replace a light-fitting and/or light switch for a metallic one, to a lighting circuit with no CPC. Property must therefore be pre 1966 (ish). Is this a definite NO-NO. I would feel very uneasy about doing so. Ta, W1ll.
  16. B

    no cpc to pendant

    Hi all Just a quick 1 I'm doing an eicr and basically I've come across 2 pendant fittings with a 2 core flex going to them and no CPC problem is that ceiling has been over boarded with timber panels there's an earth at every other fitting, what code would this warrant.
  17. S

    Broken CPC on ring final

    My friends downstairs sockets are tripping the RCD. First thing I did is unplug everything on the circuit, switched on the MCB and the RCD tripped. Tested continuity of L-L N-N CPC-CPC between the legs. CPC has no continuity whatsoever. Could anyone advise me what would be my next step to...
    • skamuk
    • Thread
    • broken cpc final ring ring final
    • Replies: 59
    • Forum: UK Electrical Forum
  18. L

    Voltage between Cpc and neutral

    Hi If anyone can help,I am carrying out an EICR on part of large hospital and have found voltage that varies between 100 and 200v between live and neutral on one single phase submain cu. It is present when main switch is off so is on load side. Apparently they get voltage around 0v to 60v...
  19. J

    fault on N&L to CPC

    It's been a few years since college and I'm stuck on understanding this, I'm getting an intermittent fault on kitchen sockets. Causing some tripping. Broken it down and when I IR test the circuit. L to E is 200+ N to E is 200+ But when I test N&L to E thruster fluctuates between 120Mohnm to...
    • jimmy
    • Thread
    • cpc don't fault reading sockets
    • Replies: 13
    • Forum: UK Electrical Forum
  20. P

    SWA used as CPC

    Is there a reference guide for which SWA sizes can be used as the CPC? I have a 120mm 4core SWA at 110M and although the Zs value has been measured at an acceptable value our electrical insurance inspector wants all SWA cables above 16mm on site (industrial premises) to have a seperate earth...
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