neutral

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  1. N

    277 Volt lighting. Y system. I have a string of lights out in a hallway.

    277 volt Y system lighting circuit. A string of lights out in a hallway. Have 277 to ground on both my hot and my neutral. Have only 15 volts between my 277 hot and 277 neutral. This was discovered Friday afternoon, Co. does not pay OT so its my unwanted challenge for Monday. Will look at prints...
    • NKH Kris
    • Thread
    • ground lighting lights neutral out screwfix string system volt wire
    • Replies: 1
    • Forum: UK Electrical Forum
  2. L

    Neutral reading 1.8 V

    If I am reading 1.8v on a neutral is that acceptable. Reading on a 3phase 277v lighting neutral. Thanks
  3. I

    Use of Singles for Main Earth Conductor and Incoming Neutral?

    Hi folks, Limited experience here and never come across this before. Whilst I can appreciate the conductors may be the appropriate CSA combined, (I haven't measured them) terminating the Main Earth Conductor in the MET like this with what looks like 4 x 4mm2 doesn't allow for the conductors to...
  4. I

    Need to understand the neutral conductor

    Appreciate there are a lot or questions about this already but I just can't seem to grasp it so hopefully asking the question in my way will help. Background: UK 240v AC domestic system. As I understand it, if everything is wired correctly and there are no faults, I can touch the neutral...
  5. KeenPensioner

    Borrowed neutral - again!

    As I've said before, I'm not a qualified electrician but have worked as a mate a few times. I'm retired now and as a hobby I study all things electrical (domestic). I know this has been asked before on this forum but as an amateur I still can't understand how the wiring for "borrowed neutrals"...
  6. Iain Stewart

    Can I bridge Neutral Busbars in a CU

    Hello, Old Merlin Gerin CU with one RCD in the middle. Can I bridge accross the Neutral Busbars in the CU to make all the circuits RCD protected. Thanks
  7. I

    No neutral smart switch, faulty?

    Hi, I've just purchased a 2 gang no neutral smart switch, however I was sent 3 gang. I thought i'd use it anyway. When i connected the common(S) to "L" & Switch live "L1" & "L3", nothing happened, switch didn't light up, lights didn't come on. My current switch operates 2x lots of led down...
  8. O

    No neutral wire for smart switch?

    Hi all, first post here, let’s go. So I’m installing a smart switch in my kitchen and after pulling the existing switch out I noticed that there are only two cables in the wall box. Each of the two goes to the switch with a simple straight connection. I’m assuming that these are both live...
    • Opatry
    • Thread
    • neutral neutral wire smart smart switch switch wire
    • Replies: 4
    • Forum: Lighting Forum
  9. C

    Earthing neutral in a multi source system

    This has me clueless. Why must the neutral be unearthed at the transformer and generator and only allowed earthing at the switch-gear? I can't see any reason because the neutral will normally not be carrying any current and thus no parallel current paths would form.
  10. J

    Smart Lightss - Moving a neutral, IFTT

    Thinking of going the following & wondering if there is any reason why I shouldn't I live in a UK House with the Lighting wired as loop in/out at ceiling rose & then a twin and earth taking a permanent line to switches & bringing a switch-live back (over the blue cable - marked with brown...
  11. B

    Updating 1982 Pre-fab building with fuses & no grounding

    Hello, I have a flat/apartment in a building as described in the subject. I am wondering what to do about the current and additional outlets to have them be safe for kids. The options: -Replace fuse box with circuit breakers -Run ground wiring and connect it to neutral at the junction boxes...
  12. P

    shared neutral in lighting circuits

    I need some help in deconstructing the following ( please see photos of upstairs downstairs switches ) as I don't know what the circuit diagram would look like in this case? It works perfectly well Is seems to be a shared neutral circuit but does not follow the normal convention as shown in the...
  13. T

    Advice on 461.2 needed

    Hi folks, Just need a bit of advice regarding whether or not neutrals require switching. - 3 phase board, 3 pole main switch, neutral is un-switched. 416.2 (ii) states that switching of the neutral is not required if the conductor is reliably connected to earth by a low resistance to meet the...
  14. D

    update my light switch to a Smart Switch

    Hi everyone, Basically, I am planning to replace the light switches in my new build house with smart switches and as the switch has WiFi built-in it needs constant power to work so will require a neutral wire I've pulled the back of the existing lightswitch and have a "Common" and "L1" 2 x...
  15. J

    Neutral at dimmer switch?

    Evening all I went to someone's house today to look at a lighting circuit for them that's is tripping rcd. While there on a circuit as far as I can make out at moment that is not interconnected in anyway to offending circuit they have 230v at a switch between switch feed and what I think should...
  16. 1Justin

    Hager part KRN190 neutral connecting block

    Who's familiar with Hager KRN190? It's called a "neutral connecting block" by Hager with no further info. This seems a maybe misnomer, but I have never seen one in the flesh.. I'm assuming it would have a lower terminal spaced to fit a standard Hager busbar prong if it were fitted like an MCB...
  17. D

    Lost Neutral Voltage Calculation

    I understand how to calculate the current in the neutral conductor on an unbalanced three phase installation, however am struggling to grasp how to calculate the voltage movement on each of the three lines if the neutral were open circuit. I appreciate it is influenced by the current and...
  18. K

    Protection against open/loose neutral?

    Hello friends, is there such a thing as a "smart meter" that I can install on my backwoods house that will trip if it detects a loose/open neutral? If so, where can I get one? Thanks very much
  19. S

    Help finding fault after a short Circuit( Com with Neutral )

    Hi there Im reaching out here as I have given up trying and couldn't find a local electrician to help today . so the issue . after painting the wall I was try to fit the light switch back into the wall and somehow the com cable touched the metal surround on the wall. the lighting RCBO...
  20. Prytaneion

    John Bercow

    As he can't identify neutral, do you think HoC Speaker John Bercow should be banned from being an electrician?

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