rcbo

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  1. I

    RCBO required?

    Would you deem a socket (twin or commando) to be exempt from requiring RCD protection if it is fitted above a suspended ceiling installed to supply a specific piece of equipment? Initially I'm thinking yes. Wouldn't think anyone is going to go out of their way to access them if there are other...
  2. timhoward

    MCB -> RCBO I'm missing something silly

    Simple job, swap an MCB to an RCBO on a lighting circuit. It's got me totally stumped! IR test L+N -> E is fine on the circuit. So is Zs. All 2-way switches operated. Instant trip when changed to RCBO though, and tried two RCBO's Ramp tested them both, all good. All tests pass on them with no...
  3. C

    Rcbo

    Hi all in a rcbo t Should the white pe cable. he sleeves in green/yellow earth sledging on a domestic consumer unit thanks for your help and stay safe Pete
  4. newfutile

    Maximum ZS exceeded on RCBO

    On a recent EICR i have ring final circuits (sockets) on type C 32 amp rcbo Some of my ZS reading exceed maximum ZS (0.55 OSG) ie:0.65 ohms . On a earth fault this will disconnect via the MCB part of the RCBO. How can i ensure a LINE to Neutral fault will still disconnect?
  5. Bradmarsh

    No power but RCBO has power.

    HI guys, I have an odd problem. I haven RCBO that did trip, I have found the reason and corrected it. However, when turning the RCBO it stays on, it has power yet it does not seem to provide power to my light. this is for a lighting circuit only, so there are no power points to remove things...
  6. R

    What Crabtree type RCBO fits this board?

    Hello guys, completely forgot to remove the board cover to check what type of rcbo was required for this particular Crabtree board. Anyone from experience know which type RCBO fits? thanks in advance!!
  7. B

    TN-C-S (PEN) RCBOs Discussion

    I'm currently planning for a CU upgrade on the domestic premises, and following previous advice on this forum, I was told that I should consider upgrading to a Type A RCBO CU. I have been doing a bit of reading and came across some confusing information, stating that an RCD would not work on a...
  8. M

    Square D SQOR RCBO replacement?

    Morning all, Does anyone know if there is a replacement part for this discontinued one? I’ve seen some second hand ones floating about on eBay, but if I can’t find a brand new alternative then I’ll have to change the whole board. I’ve sent Schneider an email almost a week ago and still haven’t...
  9. P

    What cable size and breaker would I need for two extractor fans in a public toilet? 1.5mm 3 core and a 20amp rcbo?

    What size cable for 2 extractor fans in a public toilet?
  10. D

    Oven RCBO tripping

    I've just installed a new kitchen consumer unit with RCBOs. The client says the oven RCBO is now tripping when it cools down. Any ideas what could be causing this?
  11. R

    If all circuits are rcd or rcbo protected max current 150mA why do you still have to install 16mm earth

    THIS IS FOR ELECTRICAL NEWS ONLY
  12. i=p/u

    Rcbo replacement fuse board

    a fuse carrier is broken in 6way mem board with no rcd protection , it makes sense to upgrade to rcbos like other boards in the installation.. My question is , I'm nearly certain there is borrowed neutral on the lighting circuits and he won't want a wire fitted from kitchen to landing to...
  13. Sonia Norman

    Rcbo tripping

    I came across something new today. When I removed the main earth to do ze the rcbo tripped. Put the earth back in and it's fine. Can anyone explain what is going on?
  14. S

    RCBO neutral fly leads to bottom of main switch?

    Hi, first post here! Just wondering on your thoughts on RCBO neutral fly leads being connected to the bottom of a main switch? Went to replace a cracked double pole switch for the storage heater, went to give it a quick test and came across this. Dual RCD board with an extra main switch added...
  15. N

    RCBO identification

    Anyone recognise what make/model RCBO are these ?
  16. HappyHippyDad

    will this newlec rcbo fit this newlec board?

    I need to get 30mA RCD protection to a new circuit I am putting on this consumer unit. I didn't take the cover off so I am not sure if there will be spare ways on the RCD side of it (wish I had checked!). It looks likely that there would be space, does anyone know if the RCD side of this board...
  17. LewisM

    RCBO Blew Up

    Hello I you are all well This is hard to explain but basically doing a three phase install and there is no power yet so I wanted to test two lighting circuits before the lifter went, I used an extension lead and connected live to phase L2 (that's what the lights were on) Neutral to the neutral...
  18. Midwest

    Global IR testing on RCBO populated CU

    I shall be replacing my dual RCD CU, for a all RCBO populated CU. A question or two about technique for IR testing. For the IR test, I've read here before that a global IR test is preferable. With older types of RCBO's that wasn't possible, without disconnecting cables, which ended up with the...
  19. tank

    Tie wrapping RCBO neutrals.

    Hi guys, if 16 RCBO neutrals are tie wrapped together for neatness, are there any thermal considerations such as grouping factors to be taken into account?
  20. S

    RCBO passes 30mA but fails 150mA but in a strange way. Any ideas?

    Morning everyone, this is my first post - although i had an account years before that seems to have been lost. Can any of you shed some light onto a situation I've come across. I have a newly installed RCBO which is failing the x5 test with a reaction greater than 40 mS. Now, I don't have a...
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