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neutral

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  1. 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...
  2. 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.
  3. 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...
  4. 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...
  5. 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...
  6. 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...
  7. 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...
  8. 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...
  9. 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...
  10. 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...
  11. 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
  12. 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...
  13. Prytaneion

    John Bercow

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

    No earth or neutral

    Went to customers house yesterday (TT System) with a reported loss of power to the outbuilding. Checked the main consumer unit & the mcb was off, so flicked it back on, plugged in the megger & it showed 230v. But when I tried the lights or plugged in the Strimmer nothing happened, when tested I...
  15. G

    Neutral between phases

    I am trying to connect a smart light switch but there is not neutral. Next to the switch there is a socket with a neutral but it is under a different phase. I understand that it is the same neutral for the whole house on all phases, but when I use the other neutral, it short circuits. I checked...
  16. C

    Open Neutral Issue

    Having issue with open neutral. Site won't let me post any details saying its spam...not sure why?
  17. T

    Flow of current in a neutral wire

    I am taking this HVAC class and have been studying up on the basics of electricity, magnetic induction, AC/DC, Ohms Law etc. I have a basic question concerning the flow of current in the neutral wire of a single phase 120v circuit. I ran a few questions by my instructor (Mr. Samuels). He was...
  18. I

    TIPS? Running Neutral Wire in Old Conduit NYC Building approx 1950

    Hello! I am setting up a smart home system and will need a neutral wire for the application. Some of the existing switches to be replaced only have 2 wires. I believe I will need to run my own neutral line through the existing conduit. I have done so before and just used a stiff wire with...
  19. B

    All three neutral wires needed for a smart single gang light switch?

    Hi all, I'm wiring one of those smart switches which is a single gang and I have three live wires (x2 com) (x1 L1) and three neutral wires that are currently in a block. The original switch just use live (com and L1). I've wired up the new switch with the live wires but I am trying to attach...
  20. D

    Can I Jump off a Neutral wire on an existing 3way Switch

    I’m working in a two gang box, currently has two switches (1 3way with a neutral wire, on old 2 pole switch) I’m trying to replace the old 2 pole switch with a Dimmer Switch that requires a Neutral Wire. The 3way switch next to it has a neutral wire. All other neutrals are cut short and...

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