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neutral

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  1. J

    UK Three phase (No neutral ) EFLI testing on an RCBO

    Hi I have a MFT1553 Mega tester. Is there a feature on the tester to test 3phase RCBOs when there’s no neutral present? Pretty sure mot. Was wondering if i could temporarily connect a neutral on a Wander lead and use the three wire test method? Thanks John
  2. UKMeterman

    Stolen neutral incident London 300+ properties with 400V up the supply

    There has been a stolen neutral incident in West London on Thursday morning, someone stole the neutral link from the substation and then it was quite spectacular inside 300+ properties and a Petrol Filling Station! At the start of the emergency the fire service had 8 fire engines and their...
  3. J

    UK Standardising on site to TP & N Sockets rather than TP and no N

    Hi I have a site where they have some sockets fed via Three Phase and Neutral and others TP with no N. Rather than both types of sockets for both types of appliances, was looking at 'standardising' and upgrading all plugs to TP and N. And where the appliance did not need a N, it would be left...
  4. I

    Smart light switch install with no neutral required

    I have just received a wifi switch that does not require a neutral. As far as I thought, it would then be a straight swap with the existing 2 gang switch. However, I can’t seem to see an Earth on this new switch and looking at the current wiring I can’t see how it would switch over. Any ideas? I...
  5. F

    No isolation of Neutral in Single phase boards

    As title. Doing an EICR, have come across a couple of DBs, where the neutral goes straight onto the bar on Single phase boards. Whats your views on this guys? Should it have a requirement to be isolated? Is there a reg for? If so then it can be coded. My boss thinks its dangerous. I don't, but...
  6. S

    UK Dead short neutral to earth

    Hi. I am after a bit of advice if anyone can help. I got called to a job due to RCD tripping. Ir circuits and fault was on cooker. Disconnected cooker and fault gone from DB. The landlord tried to get the cooker fixed , but appliance engineer couldn’t fix, so he brought a new cooker. Today he...
  7. C

    Braking Time Neutral Distributed vs Neutral Not Distributed

    Can anyone tell me what this pertains to? https://file.scirp.org/Html/4-6401053_6647.htm And why does it reference table 41.1?
  8. K

    UK Voltage between gas bond to neutral

    So up until this morning I thought I had seen most faults in an electrical installation, but this one today has me stumped and I’m not sure if I’m being stupid and the issue is staring me right in the face! long story short we went to a domestic property with a TNCS to install a supply to a...
  9. N

    Neutral to earth voltage

    Favour for a mate has turned into a nightmare. Really appreciate any comments on the below! Was asked to look at some sockets which have apparently been "sparking"....... 17th edition board. 100amp/30ma RCD as main switch and only additional protection for 11 circuits. Unsure if that conforms...
  10. P

    Neutral to a switch for future use?

    So I've seen some posts in the past about smart switches needing a neutral at the switch. I have a rewire coming up and was planning to use 3 core and earth as the switch line for some switches (2 gang switch will need just 1 neutral from a 3 core earth and the other SL can be T+E) as the switch...
  11. Les Macaulay

    Joint in switch box

    For a lighting circuit, Do you consider it bad practice to have joint in neutral at a switch box instead of separate joint box or 3-plate ceiling rose?
  12. I

    Neutral and earth bonded together

    Hi All, apologies for a long post I'm currently in my in-laws house abroad and while having some break I also fixing electrical issues as it seems to be quite few. It's a farm estate and wiring quite old with some DIY involvement over the years in Ideal world I would rewire whole thing but it...
  13. R

    Need to add neutral slots to my 125 amp panel to match ground slots.

    I have an Eaton 125 amp panel with a ground bus bar with 24 slots and 14 neutral slots. I have a 6 breaker Reliance 7500w transfer panel connected to it. The main panel has 4 unused breakers. I need to increase slots on my neutral side. Can I add an additional neutral busbar to the existing one?
  14. 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
  15. 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...
  16. 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?
  17. 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...
  18. 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...
  19. 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...
  20. 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...

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