neutral

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  1. F

    Neutral to Earth

    how many ohms can you have neutral to earth without opening a 30mA RCBO. My thinking is If=V/R so, If=230/0.03 = 7.6Kohms So 7.7kohms will keep it closed
  2. B

    Electrical insurance claim for broken underfloor heating 400v+ neutral loss?

    I'd appreciate some advice on an insurance dispute: Last year the electricity board sent someone to replace our 3 phase meter. He mis-wired it and popped anything electronic, any lights that were on, and a fair number of white goods. He left it mis-wired for about 15 mins and it didn't trip any...
    • beaumoni
    • Thread
    • broken claim electrical heating insurance neutral underfloor underfloor heating
    • Replies: 1
    • Forum: UK Electrical Forum
  3. J

    Why neutral and hot reversed only when a/c is turned on?

    I have tenants that have 3 fairly new small a/c units all the same and when any of them are turned on my tester reads hot & neutral reversed. The 15 amp circuit that feeds these units has no ground wire. Is this normal or could these a/c units be wired wrong from the factory?
  4. S

    DIY Electrical: Help identify ground & neutral

    Hello experts, DIY enthusiast trying to replace a conventional light switch with a smart switch. Setup: The box has single light switch but 6 wires. 2 black: live & load 2 white: I assume are neutral 2 copper: I assume ground Problem: The smart switch needs a neutral & ground. I am...
  5. B

    Ceiling rose only neutral (pics)

    I’m trying to replace my ceiling pendant and the wiring is confusing me. I have two neutral (black) wires and two live (red) wires, however the two live wires are looped and there’s no way to attach them to the new fitting without slicing and stripping the wires which I don’t want to do unless I...
  6. A

    No neutral

    Hiya, help needed! Had extra sockets added to our box room in Jan. Original socket and new ones now dont work. Socket tester shows no neutral. What could this be? Few weeks after they were fitted partner drilled into a pipe while securing a floorboard back down. Plumber came to fix this. We...
  7. S

    rcbo neutral lead question

    Hi, 1st post so go easy on me lol. just wondering if this is normal or if i should be looking for an issue? Today i was fitting ferrules to the fly leads on a compleated cu,cu was fitted 2 weeks ago but did not have any ferrules at the time. So upon dissconnecting each each lead (main switch...
  8. L

    RCBO Neutral Leads bunched with Main Neutral in Main switch - C3 or C2?

    Hi all, Engineer carried out EICR and marked the above as a C2, I agree, the smaller cables could come loose easily as the terminal is mainly clamping the 16mm tail. Client said C3....
  9. V

    3 wire (2 hots/1 ground...no neutral) Range wiring ok?

    New range on the way and took our the old range (about 2010 install) that was hard wired in with 2 hot wires (black and red) and a green ground wire that was attached to the neutral wire post on the old range. diagram for new range says that 3 wires should be red & black hots along with a...
  10. D

    How is this switch powered? I thought all circuits needed a neutral?

    Usual problem with smart switches - no neutral at the switch, been plenty of threads on it before. Fortunately managed to find some switches that don't need one. So the circuit's permanently 'complete' since the switch is permanently 'on', and actually power is going to the light, but not...
  11. J

    Fuse blown and neutral wire sheathing melted.

    Hi guys, hope you can try to shed some light on what might be the problem. Basically nothing is new, all been the same for 3 years since we moved in but over the past few days when the dishwasher was on (or anything plugged into a socket in the kitchen) I noticed a burning plastic smell...
  12. I

    Borrowed neutral / RCD trips but circuits still live ?!

    I’m just a homeowner, so please forgive me if my question sounds stupid .... i think the lights in the hall of my small bungalow are using a borrowed neutral. I recently went to fit a new light on the ceiling in the hall using the existing connections and turned off the MCB that said “Hall...
  13. W

    Connecting 2 neutral wires is tripping out

    Hi guys, I posted in here the other week and thought I'd figured out my mistake but now I've landed with another problem. I'm trying to replace 2 walls lights - like for like - the 2 lights are powered by a double switch in our living room. One switch controls 2 lights on one half of the room...
  14. L

    There is a one circuit (one voltage source), two phases and

    Hello Electricians, This is my first post and I'm glad to be one of this forum member. However, to clarify my question. I've a "Skin Effect Heating System", fed by 1240 V. The circuit is quit simple, Phase U, Neutral in the middle and Phase V. Phase U and Neutral feeding the heating cable#1...
  15. P

    Floating neutral and UPS

    Here is my dilemma. Picture this arrangement: a system with a 100A three-phase supply will have a RCD incomer (and possible some generator transfer switch in the future). As well as the SWA supply cable's earth there will also be some lightning protection so a few earth rods as well. From the...
  16. M

    Identifying a neutral supply problem?

    Had a call today. Property has 400v 3 phase DB....it used to be old commercial unit but changed to residential. He's been in process of moving in but within day or two appliances starting to burn out. He's father had reported testing some sockets and voltages varied at times when other...
  17. C

    Blown Socket- Possible neutral earth issue

    Hi Members, This is my first post, I live in South Africa with similar domestic DB set-up as UK & Australia. Yesterday, we had a kettle blow the receiver socket in the kitchen and this tripped the earth leakage switch, I am trying to see if I can fix this, I have sa fair degree of knowledge...
  18. M

    What are the implications of a failed Neutral - Earth insulation resistance test?

    Greetings! Newbie here! We have 3 phase installation in our Lighting dimmer rack. During Insulation Resistance testing on Earth-Nuetral, readings was 0.33Mohm on 500v test. What causede the failed test and how can I troubleshoot? Thank you! Markus
    • markusjames
    • Thread
    • earth failed insulation insulation resistance insulation resistance test neutral resistance test
    • Replies: 20
    • Forum: UK Electrical Forum
  19. O

    Wiring Mishap - Wondering How Much I Destroyed…

    I'm a DIY kind of guy, and was never really fond of household 120V/240V power before, until I had a friend who used to be a journeyman help me understand enough to wire up my house we are completely renovating. So, after putting some walls and trusses in place, and running conduit all day...
    • Outtaluck
    • Thread
    • fried ground main breaker mishap neutral parallel short circuit sparks wiring wondering
    • Replies: 12
    • Forum: USA
  20. Mark Wright

    Short Circuit Line to Neutral where does the current go after the consumer unit?

    Short Circuit Line to Neutral where does the Current go after the consumer Unit? I assume it goes back to the Sub-Station where it is earthed but i'm trying to find this written in a official book etc but finding nothing. Thanks

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