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rcd

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  1. 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...
  2. 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...
  3. 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...
  4. 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...
  5. 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...
  6. 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...
  7. 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...
  8. 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...
  9. 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...
  10. 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
  11. 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...
  12. 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...
  13. 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...
  14. 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?
  15. 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...
  16. R

    Can anyone explain what a time delay RCD is needed for?

    I've scoured the internet for what these do and am coming up short on finding information. What are these for? (ie what specific problem are they trying to solve) and why do they need to be time delayed? Thanks in advance
  17. F

    Replacement DB to Submain RCD advice

    Morning guys, I would like some advice, currently at my workplace, I am replacing a DB and existing wiring in a warehouse. One of the ways feeds a sub-db to a small office. The sub-db is an old wylex rewireable db with 3 of the 4 ways used (Sockets,sockets,lights). My company does not want to...
  18. V

    EICR code for lack of discrimination between RCD's

    Hi all Called to do an EICR on a property 4 studio flats / bedsits within a single house. The t&e sub main to each flat runs within the fabric of the building and has a 30mA RCD at its distribution point...assuming this was an add on to the original installation. Each flat has a RCD main...
  19. N

    C2 Vs C3 for no RCD on various circuits

    So I'm getting various responses to this depending on how things are interpreted. Here's a scenario: Assume property is a tenanted property. Assume cables are run buried in walls/under plaster (depth unknown). Which of these circuits merit a C2 if they are not RCD protected. 1. Lights 2...
  20. M

    UK RCD trip without appliance powering on

    I’m going to call an electrician out on Monday, but curious if anyone has any ideas about this fault: I have a new kitchen fitted and two existing ovens connected to existing Cooker circuit. Both ovens have been working fine. new 7.4kw hob has been just been fitted to replace a small 13a one...

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