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rcd

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  1. Y

    Box ground causes rcd to trip at > 1amp

    I have just checked a double outlet and it trips at 18ma. It was supposed to be faulty. Washing machine had a bad heater which got replaced but using the same socket it kept tripping the rcd. Socket next to it worked okay. Replace double socket with a new one. At the same time ran an earth wire...
  2. O

    UK RCD sockets on RCBO protected circuit

    hi all come across a new build commercial office where radial circuits feeding electrak power track was protected by 32A RCBO at dist board and the electrak tap off leads terminated into RCD under desk sockets why install RCD sockets when circuit is protected by 32A RCBO is this install correct...
  3. F

    How to wire Hager CDA263U RCD?

    Can I connect the supply line and neutral to the terminals 2&4 and the load side line and neutral out of terminals 1&2
  4. M-B-Electrical-Services

    RCD protection for a temporary 16A commando socket outlet

    Hi all, Just a quick one regarding the need for RCD protection for socket outlets rated up to and including 32A. I have been tasked to install temporary power in the form of a single 16A commando socket outlet for the purpose of feeding a boiler to maintain heating in a building owned by the...
  5. W

    UK RCD 4 gang extension for use abroad when travelling

    Hi, just hoping for a bit of advice. When I travel abroad (Europe, predominantly Spain/Cyprus) I usually take a single travel adaptor and a UK 4 gang extension. As they're getting on a bit, I've just ordered replacements and am thinking of putting an inline, non latching RCD between the plug...
  6. M

    Trip MCB at times RCD too intervals days or hours; test if faulty appliance

    Hi I am asking for help as a novice and 1st time user of this forum. Recently started to experience tripping of MCB & sometimes with the RCD at random times, intervals can be days after resets or several hours. Could an appliance or appliances be overloading the circuit? How can I test an...
  7. B

    UK 3 phase rcd protection

    Hi everyone, I have been asked to pull in some new 3 phase supplies for 7 new welders which do not require a neutral connection. The client has specifically asked for them to be plug and play and rcd protected, which is fine as they are under 32amps. I will be running in 5 core swa's for...
  8. P

    Can I add PIV to lighting circuit with no RCD protection?

    As I've mainly done site work and moved into domestic recently, I'm a bit rusty on stuff like this, but if I'm adding a loft PIV unit to an existing lighting circuit via an unswitched fused spur, if the lighting circuit has no RCD protection am I allowed to install it? Same question for if...
  9. tony9i9i9i

    Faulty RCD tripping on the button but not via the tester

    What should you do if a client has a CU that is a split board protected by 2 * 63Amp 30mA double pole RCCDs, you took Zs and tested both RCCDs by their buttons before starting work. But on completion of work, one of the RCCDs, when tested via tester, would not trip, the other operated as expected!
  10. A

    Adjusting tripping time.

    Hi all, Curious one and hopefully some one of you could give me some advice. A customer has had a steeltech shed installed at their premises. A large one. Wants 3x light fittings and 5 double sockets intalled. There's an electric roller shutter door on the shed also to be plugged in. My plan...
  11. J

    S-Type RCD Selection

    I was wondering if someone might be able to help either confirm or change my understanding on the use of S-Type RCDs. I believe that they can be used to aid with selectivity and avoid potential nuisance tripping, providing the ratio of the rated residual operating current of the upstream S-Type...
  12. C

    UK Change RCD type at CU to enable RCDs at socket outlets

    Hello All, I am a homeowner (but not an electrician) and I am renovating a house that has an old CU containing MCBs and an MK LN5725 residual current-operated circuit breaker on the supply side (25A, 30mA trip current). The RCD is there because some of the circuits supply power to outbuildings...
  13. cliffed

    RCD Tripping intermittently

    Called out to fault on RCD tripping maybe twice in a month for sometime. Did all the tests & found RCD was faulty, Refitted a new Rcd Type A which made matters worst. So refitted original RCD Type AC for the time being. Insulation Resistance measurements were 20 M ohms. Ring continuity fine...
  14. I

    TT Install with Solar - RCD question

    Hello Need to replace a distribution board in the next few weeks to allow for more circuits to be installed in January. Existing is a TT system with a solar installation fitted. Current install has a 100A TP incomer, meter, C63 TP MCB, solar install, 100ma RCD, distribution board fitted with...
  15. C

    CU change where sockets can’t go on RCD

    Hi, I have a job for a customer, the consumer unit is an old 3036 board and there are several holes in it giving access to live parts, I can change the consumer unit but when put on an RCD the sockets trip. IR readings on the sockets are low but the customer isn’t in a position to have them...
  16. S

    UK RCD Type A or Type S?

    Hello! I've been racking my brain this evening about some RCD selections. I've been doing some work for a solar installer, and they've asked me to do a battery storage setup, specifically with EPS for battery power. I'm stuck on my RCD selection because basically, I'm going to shift 4x...
  17. A

    UK RCD nuisance tripping

    At my place of work we have just had multiple LED advertisement screens fitted outdoors, the company specified 16amp RCBO’s for each set of screens. On powering up, the circuits were nuisance tripping due to earth leakage. So the company who installed swapped the rcbo for MCB’s. The screens...
  18. 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)...
  19. 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...
  20. 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...

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