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rcds

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  1. C

    RCDs in patient care areas

    Does the UK require RCDs in patient care areas? I saw this guide for Australia and it appears that 10ma RCDs are mandated in Aus? https://electricaltestingcompany.com.au/wp/wp-content/uploads/2019/01/Body-2018-rev-C.pdf In the US GFCIs are not required, and where GFCI would be required like...
  2. M

    RCDs tripping during heavy rains

    Hi all - hopefully you can forgive my lack of knowledge on electrics, I have a basic grasp but am no expert. The issue I've had and am looking for an initial steer on is that during some extremely heavy rains recently, after a long spell the RCDs will trip. While still raining, they will not...
  3. Strima

    UK RCDs/RCBOs and DC Interfereance

    I've just carried out a periodic inspection on a building on an old RAF/USAF site. Commercial single story building. Wiring system is around fifty years old run in a mix of trunking and steel conduit. Three phase supply, TN-S from local transformer around fifty meters away, underground supply...
  4. N

    UK RCDs Underrated?

    Hi. Could you please advise on whether 63A RCDs are acceptable when the service fuse is 80A? I have the following setup: 80A service fuse - 100A main switch - 63A RCD x2. Each RCD has three circuits. First RCD: Shower 40A + Sockets 32A + Lights 6A. Second RCD: Cooker 40A + Sockets 32A + Lights...
  5. P

    Top-feed or bottom-feed RCDs?

    Another disparaging Hager-related question: does anyone know if it matters which set of terminals are feed power, and which are load for RCDs? Typically incomer RCDs are fed from the bottom, but the supplied instructions/datasheet (for what they are worth) for the likes of the CDA425U 4-pole...
  6. M

    Saftey before RCDs

    I understand the importance of RCDs, what they do & how they can save lives. I agree with there requirements. I also understand you can meet ADS disconnection times with high enough Zs values for relevant fuses or MCBs, etc In the 18th edition the use of RCDs is much more widespread The...
  7. J

    UK Do MFTs that test Type A/AC also test type F, type S, and Type G RCDs

    Just bought an ethos 8400 mft, it's very simple, but as a trainee just wanted to know if it's possible to test Type A, AC, F, S,G RCDs with this tester, it says it tests only type S and type G. So I'm just a bit confused.
  8. A

    RCDs in series in domestic house

    Hi folks, just a query about having two RCDs in series. I want to have installed three new external 2 gang 13 amp SSO to IP66. I currently have a 100 amp BG CCU installed by an electrician in 2016 with split load and 2 BG 63amp 30mA RCDs labelled ICE/EN 61008. The supply is what we used to...
  9. steamboatwilly

    Two new Wylex RCDs both failed tests

    Folks, A bit baffled (not difficult) ... added a light switch in a rental this week (empty property so no social distancing issues) and checked the RCD before I signed off. It was a Wylex 80a 30mA and it failed all tests (inc. ramp) so I like-for-like replaced it. The new one also failed all...
  10. S

    How do I certify when there are no rcds to test

    I have an elderly client that wants some additional sockets adding to a ring final circuit, some are simple spurs and some will need the ring extending - pretty simple jobs. she also wants some independent switching in her lounge, an additional light in the hallway with 2 way switching - again...
  11. S

    Laos - no earths, no RCDs... advice please

    Hi everyone! :) I've just recently moved to Laos PDR and was shocked (no pun intended) to find that the whole house has no earth wire (i.e only Live and Neutral) going to all sockets and appliances... to top it all off also no RCD's... its completely ridiculous. I am not an electrician and...
  12. D

    Rcds in series

    Hi, Regarding discrimination requirements in regs.. If a second cu is fitted in a shed or outbuilding supplied by an rcd protected way at the main cu then it provides protection at a change of cable size due to the mcbs but that leaves two rcds in series with no discrimination. However is...
  13. W

    RCDs when to use

    Sorry I’m struggling to use the new search to find a old post ... I need refreshing spoke to a few sparks and they say just put a rcd for everything... But what are all the 18th edition requirements when to have an rcd? Thanks
  14. C

    AFDDs are a massive fraud

    Derailed another thread with AFDDs, so I am starting this one. I will simply say that UK RCDs and MCBs provide arc fault protection as is. UL not only knows that, but extensively researched UK power systems in an effort to emulate the very same concept 40 years. One the simply fact (growing...
  15. A

    Board change and the use of rcds

    Hi guys. Looking for a bit of advice if poss. Looking at changing a board as part of an assesment. Looking at the new regs it states that the use of type a rcd now should be used. But I have had conflicting info from others saying ac is still ok? I know type a is for the allowance of detecting...
  16. T

    Type A RCDs Vs Type AC

    I understand why the increased use of type a rcds are recommended however there’s something I don’t understand. If these type a rcds aren’t tripping at 1x on a normal 50hz ac cycle or at x5 then surely they can’t be fit for purpose because they are not detecting a potentially critical fault. In...
  17. Gavin John Hyde

    Do sockets on trains have rcds?............

    Currently on train to paddington to get to gatwick. Using socket to charge my phone and tablet. Wondered if sockets have rcd protection on the train? Is each carriage on its own board or breaker? The amount of people plugged in I imagine there is quite a bit of earth leakage. One woman has hair...
  18. R

    RCDs tripping at several properties

    Hi, I'm a resident at a Park Home site (glorified caravans) with about 50 houses. On Saturday a.m. my fuse box RCD tripped out but only for the sockets. I assumed that I was at fault and proceeded to isolate appliances to find the culprit. That afternoon it went again. At that time I became...
  19. S

    RCDs then RCBOs tripping.

    Wondering if anyone can shed any light on an electrical problem I am having. It started about 8 weeks ago with brief power interruptions causing some of my appliances & electronic devices to trip. This stopped but the 2 RCDs in my fusebox then started tripping simultaneously. I had an...
  20. C

    What do we need RCDs fit anyway...

    Not sure if there is a specific group for posting things like this? When your RCD stops working this is a much cheaper remedy to the problem.. This issue was quickly rectified for the customer (correctly)

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