rcd

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  1. B

    TT system do I need to fit a main switch or time delayed RCD switch?

    Hi everyone I'm ready to do second fix on a rewire it's a tt system all my circuit will protected by individual rcbos Do I need main switch to be normal dp switch or time delay rcd please help.
    • baazab
    • Thread
    • delayed fit main main switch rcd switch system time time delay tt system
    • Replies: 7
    • Forum: UK Electrical Forum
  2. F

    Rcd tests

    Hi, I was changing an old Square D board, RCCB MAIN SWITCH, because it was tripping at 12mA when doing a ramp test. Installed an rcbo board, and ramp test still trips at 12mA?? Any opinions on this?
  3. BlueVan

    NEFF C17MR02 Oven tripping RCD

    6 year old Neff combi Oven/Microwave trips the Schneider 30mA EZ9R33263 RCD on our distribution board when we try to use the convection oven but runs the microwave fine, even on MAX setting. One of us (not me) slightly nuked one of those part-baked baguettes using the microwave but hardly any...
  4. L

    UK The RCD test button on my tester trips the wall sockets

    We recently moved house (May 2024). The property is old (some >250 years), quite large with different outbuildings/extensions. From time to time the main power will trip (sockets not lighting). So I got out my cheap socket tester and all's well on various outlets, until that is I press the RCD...
    • Lord Oddsocks
    • Thread
    • button rcd sockets test tester trips wall
    • Replies: 9
    • Forum: UK Electrical Forum
  5. IanBristol

    RCD Trips

    Hello, I'm not an electrician. My RCD at home constantly trips. I tried turning off the power, resetting the RCD and putting the circuits back one by one, to work out what was tripping it. All were okay, except when I turned back on 'downstairs sockets' or 'upstairs sockets' either one of those...
  6. F

    TT System Existing is a multi9 13 way RCD main switch DB

    Hi Ive read a few discussions on the topic but what setup would you recommend for replacing a DB on a domestic TT system? I've moved house and need to get the meter changed ready for the car charger, I need to upgrade the severely dated DB at the same time. Existing is a multi9 13 way RCD...
    • fattony
    • Thread
    • existing main main switch rcd rcd main switch switch system tt system
    • Replies: 17
    • Forum: UK Electrical Forum
  7. B

    The RCD is tripping after few minutes of the light is on.

    I have done the new wiring in my garage with a new distribution box having a RCD and 4 MCB's. And now when I switch a light on, it works for 5 to 10 minutes and then suddenly RCD trips. Please advice what I can do to find the fault. Many thanks.
  8. J

    RCD trips

    Hello Elderly woman here, read lots of forums like this looking for advice but currently none the wiser,! I had Led PIR lights installed recently, replacing old pir security lights and an old decorative light at the front door all using the original wiring. An electrician did the work. The...
  9. impish15

    Delayed tripping on RCD

    Not even sure where to start with this… Got a split board RCD which is tripping after 10mins of being ON. Never had this before. I thought I identified the circuit with the fault (RCD trips immediately when circuit on) but looks like a fault on more than 1 circuit Customer just had a brand new...
  10. K

    UK Scame Advance 2 RCD interlock socket

    Scame Advance 2 RCD interlock socket, has anyone fitted these? There is no access to the RCD when energised. How can you conduct an RCD function test? I’ve attached the data sheet with a product photo
  11. timhoward

    Distribution circuits in Section 705 location, RCD needed?

    I just want to check how I should be interpreting section 705. 705.411.1 states required disconnection devices, the first two indents covering final circuits and sockets, requiring 30ma and 100ma RCD's depending on rating of socket. Indent 3 says " all other circuits" need 300ma RCD. Does that...
  12. J

    3 phase TPN boards - earthing TT

    Hi guys, starting a new install on a job soon and having a complete mind blank. The supply at the main cut-out is a 3 phase TNCS supply. There is then a 50mm SWA running a considerable distance to a workshop where i will be installing a new TPN board as well as an earth rod to make all the...
  13. wsoppitt

    Rcd fault

    Hello guys and girls , I have a question if I may. Have to go and look at a intermittent fault on rcd , I'm told the circuit holds whilst using light appliances ( TV, etc ) but randomly trips the rcd on heavier loads ( hair dryer ) . The manual operation of the test button also doesn't work...
  14. M

    RCD testing

    Hello all. Can anyone inform me on what the latest guidance on the frequency of RCD testing is? I test my RCD's annually and record the x1/2, x1 and x5 trip and 0-180degrees annually, and replace failures. I also carry out a functional test whilst I'm doing this, and then a further functional...
  15. B

    UK RCD Protecting Distribution Cables on a TT on Industrial Estate

    Hi All, I'm looking to pick the brains of experienced engineers who have dealt with TT more than I have please. We have an installation on a site which may or may not be unique. There are four 12m x 12m units inline with each other, all connected as one building, with the plan to build a...
  16. G

    UK RCD on bathroom ceiling?

    hello im an industrial maintence electrician (mainly emergencies in factory processes & HV work) I do very few domestic jobs - i did pass my 18th edition in 2019 but memory is very vague doing a bit of work in my home and removing an electric shower and fitting thermostatic & also fitting a...
  17. SJD

    UK Identification of Crabtree Polestar RCD type

    One of my customers has a TPN board fitted with some Crabtree Polestar MCBs with attached RCDs, and I was wanting to confirm the type of RCD (i.e. AC, A). The RCD modules have either no marking to indicate type, or are marked with the logo for Type AC or Type A. See attached photos. I'm...
  18. newfutile

    Test the (RCD) Residual Current Device or die

    Just seen this label on a consumer unit im testing. As far am im aware no one ever pressed the test button.
  19. KeenPensioner

    UK RCD tripping explanation

    As a keen adult learner any help would be appreciated I understand that an RCD trips when there is an imbalance detected between L and N. If a 30mA RCD is monitoring several circuits (in a split board for example) and one of the circuits is protected by a 32A Type B MCB. I'm trying to...
  20. R

    RCD tripping

    I recently purchased waterproof garden strip light from Amazon but yesterday I turned on garden light at night time after a long spell of heavy rain during day time and I heard a buzzing sound coming from it. After a while my RCD tripped but the same light when I turned on dry day nothing...
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