neutrals | Page 3

neutrals

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  1. U

    Joint neutrals on lighting

    Hi. Up and downstairs have been interconnected in many places. RCBO's for each circuit won't work without re-wiring. Originally on 3036's. board been upgrded to RCBO's on all else. Is it better to a) put up and down on same RCBO? b) put both circuits into 6a mcb's so they are separate still. Or...
  2. L

    Testing for borrowed neutrals?

    How would i test for borrowed neutrals? Would it be a case of disconnecting all circuits neutrals at the DB and doing a continuity test between each neutral and seeing if any two circuits bell out? hope it makes sense and i appreciate any feedback cheers
  3. O

    Basic CCU Installation.

    Hi, Can you help me with the neutral arrangement an a CCU? I've just finishing a level 2, done a 17th, and got a part p next week, getting stuck right in but as you know its all legislation and frustratingly little actual wiring!!!!!!!! So im trying to educate myself on the side. The supply...
  4. G

    fault

    I was wiring central heating in energized ( supposidly tested ) house, with only the upstairs lights breaker turned on i was getting 240v N - E on the heating supply ( seperate 16 v supply ). Dug a little deeper and had crossed neutrals / lives on the upstairs/downstairs lighting. sorted that...
  5. S

    MEM RCD failure?

    I have a split MEM2000 board (15+ years old) with four circuits each with MCBs protected by a single 100A 30ma RCD. The RCD has been tripping out over the last 4 days at increasingly more frequent intervals (initially evry 6-8 hrs now it holds for about 30mins) It trips with the mcbs on the...
  6. M

    Borrowed Neutrals ! (gotta be careful)

    Hi Lads, how are you all? Was just wondering if any you have come across "the hidden killer" (borrowed neutrals)? Thought it would be a good idea just to raise awareness. Thanx.
  7. M

    Borrowed Neutrals ! (gotta be careful)

    Hi all, my name's Muzza. (Newbie) Thought i'd raise the subject of "the hidden killer" I'm sure some of you older sparks have came across a few in your time. I think we should raise this point just to make people aware of what's lurking out there. Does this sound a bit like an old Hitchcock...
  8. F

    ring fault

    no voltage live neutral at sockets any ideas surley if lost 1 neutral would still have voltage on the other leg all neutrals are connected in main fuse box
  9. D

    Strange voltages

    Evening all, At work today we energised the newley rewired lighting circuit, only to find that from 3 lighting points onwards, the lights didnt work. Thought maybe disconnected neutral or line conductor. This was not the case, all connections sound. Disconnected the neutrals at the 4th light...
  10. R

    rcd tripping

    hi guys ,several pieces of equipment on different circuits on the non rcd side side of a split main/rcd board are tripping the rcd .the mcbs are not tripping. any ideas as to why this is happening? could it be crossed neutrals or just a faulty rcd.thanks
  11. G

    Arching from neutral on stud work

    Hi all, took s load of sockets off on a job and plasterers have been in to take the plaster board off , builder rang me and he says its arching on the stud work from the neutral, going down tomorrow to have a look, lives are out of the RCBO's but earths and neutrals still connected. you guys...
  12. S

    rcbo tripping

    im in new zealand now by they way although i was trained to city and guilds. we dont do testing over here, its retarded i dont even have any test gear apart from bog standard multi meter. i recently did a domestic install where i had to install a new sub board downstairs. i did the pre wire but...
  13. S

    Rcd problems

    Just fitted dual RCD consumer unit. Wiring old and no earth on light circuits. Customer does not want me to disturb newly decorated and new carpeted house so new consumer unit with testing is as far as i can go. However, on fitting consumer unit, at least four circuits trip the RCD. I tested...
  14. P

    Insulation Testing Conundrum

    Hi Guys Domestic - Old Hager Box 14 MCBs RCD Main Switch. Totally stuffed with wiring - not keen to disturb Tested the Full L+N busbars to E. IR = 1.8 Meg b****r! So close to 2 Meg! Tried L busbar to E -all trips off. 1.8 Meg!!!!!!!!! - had to disconnect RCD! Tried each cct in turn L to E...
  15. C

    rcbo only resets when other mcb is off

    Hi there, i have recently wired a lighting circuit and a radial circuit for two socket outlets. Run the feeds for both circuits using a 5 core 2.5mm high tough cable from the distribution board to a jointbox. From the j/b i took my feed for lights and feed for sockets, used same earth for both...
  16. A

    Wiring at the switch

    hi, can someone please remind me how to wire at the switch. i will have 1 wire coming from the CU to a 2G switch then off each switch i will be linking 2 lights. i havent been onsite for about a year and i just cant remember how to wire a light at the switch please help
  17. H

    Neutrals!

    Hi can someone please advise me as the best and easiest way to see if a house has borrowed neutrals, I have trawled previous posts but can't really find any clear answers. All help is appreciated. I have a couple of ideas but just want to see if I am thinking correctly. My current college...
  18. K

    Rcbo???

    Im scratching my head here at this, its probably because of the time off night but i cant get my head round this at all, here in the picture is a contactor for the outside lights, now this is one of many contactors throughout the building. there is contactors at each consumer but there is 1...
  19. K

    RCD not tripping

    OK this one has be beat! Replaced 2 DB's (one night storage and one 24 hour) with a dual board but adapting it so I have 2 different supplies coming in. Earth is common in the boards, but then it's common throughout. Neutral is definitely split. All connected up, tested the RCD and it did not...
  20. M

    old light switches

    guys in an old house there are lots of single gang light switches that have 4 connections. live in , neutral in then switch live and neutral going to the light. av u seen these b4 and what do i replace them with.

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