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neutral

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  1. M

    Bolted neutral at BNO

    Good afternoon all, I have been asked to look at a problem with a bolted neutral but no one seems to know what exactly is the problem. SSE metering want to install new smart meters at a block of flats but have flagged that as it is a bolted neutral bar. SSE have said that this cannot be...
  2. M

    Neutral issue wiring a smart switch for heating

    Hi. I am trying to replace a heating timer with a smart switch. The current timer is the type with a dial on the front and 1 to 24 written on it where you pull out the little lugs to set what time the heating comes on and how long it runs for, APT is the make. The wires coming from the wall are...
  3. D

    Ground bar neutral bar connection

    I have breaker box at least 40 yrs old, both conduit and romex enter box, only one neutral bar that all white wires and bare ground wires attach to, bar has bond screw to box. Most everything I read and pictures on internet seem to contradict. Nowdays box must have separate neutral and ground...
  4. B

    Borrowed neutral on split load board

    I have a client with what appears to be an intermitent fault on the lighting, but trips the power. The installation has a 16th edition board with sockets on the RCD side, and lighting on the other side as usual. Occasionally when the landing light is switched the RCD trips on the socket side...
  5. Pastory

    WHY ISNT THERE A NEUTRAL WIRE IN THREE PHASE

    Why the main three phase doesnt have a neutral wire before reaching a stepdown transformer, how does electricity form a loop back to its source
  6. KelvinGaliny

    Can Live wire runs through the Neutral side of RCBO?

    So I had an inquiry to make an electric panel (single phase) with RCBO, but it seems like our customer uses type C and F power plug (I live in Indonesia). This plug doesn't have a guide to ensure the Neutral would always be in Neutral side & Live to always be in Live side. Can I still use RCBO...
  7. dcg4403

    480V 3PH Neutral Wire Sizing

    Greetings, I'm a EE and have installed many electrical systems but am now dealing with my first large 3PH install on our property. I'm not formally trained in this area but very familiar as a EE. Anyway, can someone help me with proper neutral wire sizing? I've done a bunch of research...
  8. phochief

    Wiring new hot tub using old hot tub wiring

    Replaced our old 240v hot tub with a new one, which also uses 240v for motors, heater, etc, and 120v for low amp LEDs and touch screen control panel. Right now there are just three 6 ga wires at the subpanel near the hot tub. 6 ga Black, Red and green. The old tub only needed the two hot...
  9. B

    Smart Switch Replacement of 2 Gang Switch (Aqara Smart Wall Switch H1 -No Neutral)

    Hello, I wish to replace the old 2 gang switch pictured, with the smart switch pictured. Am I right in thinking that all 3 reds wires would need to go in L. Then the lower left black wire can go in L1. And then the pair or black wires (from the bottom right) can go in L2? Many thanks.
  10. K

    ATEX Neutral connection

    I have a compressor to be hard wired into a zone 1 container. The container has a 3 phase + E supply but the compressor requires a 3 phase, N & E. This is not something I have experienced before within an ATEX installation and when researching there is a few discussions on TN-S, IT and TT...
  11. S

    Live & Neutral swapped on sockets?

    Hi Recently my son complained that he was getting shocks from his laptop when plugged into the mains in his room. I checked the socket and the others in his room and the wiring looked fine - red to live, black to neutral and firmly connected. I then used a plug-in Ring Main tester which...
  12. Pretty Mouth

    Open neutral in cooker

    A client has a Kenwood CK405 dual fuel range cooker, for which the smaller of the 2 ovens doesn't work. The elements tested out fine, but live tests showed that both N and L sides of the elements were at 230V to E, so presumably an open neutral. I'm guessing it's a loose connection somewhere...
  13. HappyHippyDad

    Can I confirm how to test for and how to find a borrowed neutral?

    During some testing I found a N-E IR fault on the kitchen lights of 0.1Mohms. I also found a N-E IR fault on the ring sockets, again 0.1Mohms. This could have been a coincidence, but I disconnected both neutrals from the neutral bar (i.e the kitchen lights and sockets) and tested between them...
  14. J

    Reported content: Post in thread 'Domestic - RCD tripping- earth neutral fault'

    Post in thread 'Domestic - RCD tripping- earth neutral fault' by Guest has been reported by Jack898989. Reason given: Content being reported:
  15. J

    Are these earth wires connected to neutral?

    I found a picture online of a standard UK connection in a block of flats. Where I have circled blue, would those earth clamps around the orange cable somehow cut into the neutral wire to connect within the orange sleeving? Or are they just clamped to the sleeve for some arbitrary reason?
  16. J

    What happens to the voltage/current on the neutral wire?

    If we had 4 appliances to power, one in every room of a house, Once the current passes through them all, the remaining voltage & current is said to "pass back to the source via the neutral wire" Is this an accurate mental model? From what I see, most Neutral wires are somewhere down the line...
  17. J

    UK Running Neutral Wire from consumer unit to Ground henley block

    In the UK, It is said that the neutral wire is connected to ground/earth wire along the way back to the substation. Ive inherited a setup where the incoming SWA neutral wire is hard to join/reconnect to as the previous electrician hasn't used a henley block due to limited space... therefore the...
  18. A

    Shared/borrowed neutral?

    Hi, I have an ongoing issue with an RCD which keeps tripping when bathroom light (not on RCD) is turned off. The issue doesn’t happen every time the bathroom light is switched off but only ever trips when I turn it off. It happens mainly at night and there doesn’t seem to be much of a link...
  19. A

    Help wiring a neutral for timer switch

    Hi, I have ran a light ring off a fused spur with two lights on, each with their own switch (outside and lobby light) I want to put the outside light on a timer but the light only has one wire coming into it (twin and earth). I have wired up the lights as shown on fig 2 in the link below using...
  20. C

    Shock from neutral when changing light fitting - why?

    Hi All, I was changing a light fitting (something I've done many times before). Since it was a switched live to the ceiling fitting I had left the circuit still live (I know but no comments about that please!). Touched the neutral and got a small shock. So used a test screwdriver to see if...

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