rcd

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

    Wiring an MCB beetwen RCD and Main switch

    Good evening, I wondered how the MCB between RCD and the Main switch is wired while watching this video. Photo attached. I assume a busbar link is connected to the main switch and mcb. Do the line conductors and the busbar connected at the same terminal and then go to the RCDSs? Link to the...
  15. Rooster

    Is an RCD required with RCBO's protecting the circuits

    Surely if you fit an RCBO on each circuit, an RCD is not required? Of course, a DP Main switch would be to cut all power, but like I ask, is the RCD required as it is incorporated in the RCBO? Thanks
  16. happysteve

    3 phase cooker - idiot check

    I'd appreciate a quick sanity check, thanks in advance: New circuit for a 3 phase cooker, in a community centre (run by a charity). Total load 16.5kW: L1 27A, L2 27A, L3 15A. (6kW oven, 6 hotplates: 3x 2kW, 3x 1.5kW). Commercial setting so no diversity: 3x 32A OCPD. (?) TN-C-S, so Zs...
  17. ValgarGrimal

    BG SPD after RCD acceptable?

    Hello, I was looking at installing a SPD into an existing split load RCD BG consumer unit. In the instructions for the SPD it states that it may be positioned before or after a RCD but I have always been of the idea that the SPD needs to go before the RCD due to the RCD potentially tripping...
  18. M

    The EC Fan keeps tripping the RCD

    Hi All, Weird matter happening here and I hope you can help! My 3 Pahse EC Fan is connected to a sensor and a controller for the temperature setpoint. A control panel to manage the EC Fan is in the room. EC Fan above faux ceiling. The panel has it's own MCB. The RCD is upstream, before the...
  19. jjjinx

    Anyone know this RCD symbol?

    Hi guys, I know the AC symbol but the one to the right i've not seen before or just not noticed it. Anyone know?
  20. S

    Could the RCD be faulty?

    Hi, I can't get an RCD to switch on at all, even with the main isolator switched off. Is that definitely a faulty RCD or could it be something else? I have a metal 8-way Cudis CPN consumer unit with two RCDs, one with four MCBs and the other with one MCB. I originally switched the right-hand...
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