rcd

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  1. E

    RCD tripping. Not appliance

    An RCD keeps tripping. Please see attached photo of the board (2 photos attached). I’ll call the breakers: MCB (1) marked ‘Upstairs lighting’ MCB (2) marked ‘Sockets’ MCB (3) marked ‘Water heater’ MCB (4) marked ‘Sockets’ RCD (5) for MCBs (1-4) MCB (6) marked ‘Kitchen sockets’ MCB (7)...
  2. HappyHippyDad

    Type A rcd for cooker or type AC OK?

    My builder has sprung a job on me. New circuit required for a hob. The CU has a single 30mA RCD, type AC. I am still unsure exactly when I should insist on type A, and when I should just advise. Would you guys be insisting on type A in this case, thus fitting a new CU (as it is an old NSB wylex...
  3. Rod1971

    Central Heating Boiler and Treadmill tripping MCB/RCD

    Good evening, I have recently moved into a new home and I am having problems with the MCB/RCD tripping (Mem M6 Type 3 - 30mA). It intermittently trips when I switch on the Central Heating on and sometimes after running the heating for a couple of hours. The heating is gravity fed, hot water...
  4. M

    Changing main RCD AC-type to A-type

    Hi, I'm back in the electrical game after 9 years break so feeling a little rusty! I'm adding an additional socket to a circuit but the main RCD feeding all the circuits in the consumer unit is AC type. Based on this, I believe I have to change this to an A type which is fine but the question...
  5. H

    Intermittent RCD Tripping - opposite side of board

    Cant get my head round this :( I understand N-E faults cause RCD's to trip, but I cant understand why on these 2 occasions, googled allover but no real answer. I have 2 intermittent faults on the go, one Dual RCD board, one split load, 1 RCD. Dual 2 RCD Occasionally the left RCD trips when...
  6. mattgriff88

    RCD tripping switchless socket?

    Hi, I swapped a 2 gang switched socket for a 2 gang switchless socket with usb ports downstairs. I switched off all the power to the house by pulling down the double red switch on the rcd box. When I turned it back on the individual rcd switch for the downstairs circuit tripped. I turned...
  7. spud1

    Does an RCD still function when Solar PV is generating?

    Hi everyone, I wondered if anyone could help me with something that has been niggling me please?! When a Solar PV feed in circuit is installed and added onto a spare way of the RCD protected side of a split load dual RCD consumer unit (i.e. other final circuits are protected by that same RCD)...
  8. 2

    Nuisance RCD Tripping - Diagnosis Advice PLEASE

    Hi all. Have an issue i'd love some advice on if anyone would be so kind. Will try to be brief. Thank you!! So, have an intermittent RCD trip at my home. Big old house with an installation of nearly all old tinned copper wiring, that for the last couple of years, hasn't missed a beat. Old...
  9. B

    UK RCD before a 230v/24 PSU?

    Hi all I have seen a schematic drawing for a control panel recently where they (whoever drafted the drawings, designed the panel) show a RCD before the 230v/24v dc PSU, and the PSU is the only device downstream of the RCD in my mind this has no merit. The 24v secondary d.c side of the PSU...
  10. O

    NAPIT EICR forms - observations for SPD and RCD

    I've just started using the NAPIT forms for EIC's and EICR's and they are a bit cumbersome to be fair. Does anyone know which observation is for a lack of an SPD and when the RCD's are type A/C. I know they are a C3 but you need to find it in the bit where you tick "pass all" and it then...
  11. L

    Is there a chance Dual RCD Consumers could be "banned " from rentals soon?

    Client has purchased a night flat in Edinburgh. Its perfect for using as a ST rental during the festival as the agents claim £6k a week is the value based on rooms and location. It was nicely decorated in 2018 and has a twin RCD Board . Wiring etc etc looks very good .Its a tidy install ...
  12. EricMark

    RCD if required and what type, re-solar panel installation?

    I decided to get solar panels, the inverter instructions say one can use type AC, so the existing 14 x RCBO CU seems OK, may be a good idea to fit type A in the future, but if following what is says in wiring matters should have type F for my inverter drive washing machine, as if that will ever...
  13. S

    RCD trips with all load breakers open

    My circuit panel has two banks of breakers, each bank protected by an RCD. One of these RCDs has been problematic in that it trips intermitantly. A few months ago it became so frequent that we had the RCD replaced. It would trip regardless of what load breakers were shut or open. No fault could...
  14. timhoward

    MCB trip (not RCD) during loop test

    I just finished a garden room supply. The customer already had a CPN garage consumer unit that the last sparks left there, brand new in box, and with some misgivings I agreed to use it. It came to testing. Zs@DB of 0.3 ohms in garden room. CPN RCD main switch tripped x1 at 21ms The lighting...
  15. H

    RCD without neutral 2 phase supply

    Hi everyone, Quick question can you fit an RCD without any neutral connections? If I have a 3 pole circuit breaker which has all 3 poles terminated with a 3 phase supply (L,L,L excluding neutral or earth) on the primary side and I am using only 2 phases on the secondary side (L,L) to create a...
  16. I

    Spur line (non ring) on TT supply question.

    Hi Guys, Long time member and not a regular user here. I do pop in here when the odd unknown pop's up and unable to locate an electrical dilemma and cannot find a person that has the expected knowledge and can explain and help, as yet unable to find information even from respected persons. Let...
  17. P

    Non-selective RCD with SPD downstream

    Hi all, Grateful for your expertise regarding my confusion on the below. Context: French rural domestic property Single phase supply, TT earthing Supplier side RCBO (standard in France, usually next to the meter) - "disjoncteur de branchement" - 500mA, single pole protection, unspecified...
  18. CopiamElectrical

    30mA Type A RCD Protection for EV Charger? Y/N? (TESLA Gen3)

    Afternoon everyone, I have a quick question about the Tesla Gen 3 Wall Charger? Does it require Type A 30MA RCD protection or not. Only because the Wall Connector features built-in RCD Type A + DC 6mA. I know we should be installing Type A 30mA protection however we also work with what the...
  19. S

    Air Source pump tripping RCD

    Keeping this brief.....................New dwelling.....TT system with 100mA S type rcd protected supply to local board with 30mA RCD. Freelance "engineer" to commission Heat-Pump, as original company disappeared before installation. ASHP worked for a while then tripped the 100mA RCD not the...
  20. D

    How to test RCD for lighting circuit

    I live in Australia; you can use a socket tester to test the RCD for the power outlet circuit. Plug device to a 3-pin wall socket, set testing mA to 30 on the device and press test button. What is the best way to test RCD on the lighting circuit – from an existing B22 or E27 lamp holder? (Not...

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