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rccb

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  1. W

    Terminating 50mm tails into rccb?

    Hi Due to the long length of a distribution circuit I'm installing, the cable csa is 50mm sq. The earthing arrangement at the origin is TT. 25mm tails at the service are to be connected to a 300ma 100amp time delayed rcd then into a 100amp s/fuse ( fuses rated at 80 amp ) From the s/fuse a...
  2. P

    Rcd? Rccb? Rcbo?

    As far as I am lead to believe, an RCCB has overcurrent protection.They look just like RCDs tho as there is no Type B or C rating on them?I've recently installed one and i'm now worrying if its right.Any help? Cheers
  3. T

    functional testing on rccb

    Hi all replaced a faulty 3 phase rccb yesterday (main switch) with exactly the same control gear one. Testing on x1 and x5 were absolutely fine but it didn't work with the test button. I swapped it for another one assuming it was faulty but did exactly the same, baffled me! any ideas?! By the...
  4. A

    ABB 2CSF202001R3400 2 POLE RCCB 40A 300MA RCD TRIP's

    Hi. I have a number of the above RCD's for sale. All new and unused/unopened. Im looking for £15 each if poss. Happy to post anywhere. Cheers. Alex. 07595 503714
  5. M

    RCCB won't operate.

    Testing a RCCB installation off a Crabtree Starbreaker. TT installation. All non powered tests good however 30mA RCCB failed all tests. Even tried at the Dist. board still no joy. Replaced RCCB and still the same. Earth earth loop impedance via earth electrode is 248 ohms which although a tad...
  6. G

    RCCB polarity

    Some RCCBs have L on the left and some on the right, i.e. printed on the case. Is there a reason for this other than that is the way in which that brand of CU is configured? Does it matter to the internal workings of the device which pole is put on which side? Thanks.
  7. J

    RCCB Tripping!

    hi all,new on here so take it easy on me eh,just fitted some downlights in a customers garage and alls fine,she rings me up week later and says one side of board is tripping out when she clicks remote to open electric gates.just started out on my own and my fault finding is a bit rusty,any bit...
  8. D

    CU with main switch RCCB

    Hi I am currently training through skills 4 U so only have limited knowledge on electrical requirements. I need help with the following: I have just had my CU periodic test and the guy testing has told me my CU has to be upgraded as it only has 1 RCCB protecting all circuits.This is also the...
  9. 1

    3rd RCCB Fault??

    Am I missing something here or is it just plain bad luck? I've recently tested a fuseboard and the RCD failed (MEM A100HE 100AMP 30Ma RCD). Sent off for a new one and it failed got another failed again. Checked multi-tester on another board, tester works fine. It's on a TN-S system, there's a...
  10. S

    Rcbo rccb

    Whats the difference apart from the names? :confused::confused::confused::confused::confused::confused::confused::confused:
  11. A

    square d quickline rccb

    Hi Guys, does anyone know if the current Square D 'Qucikline 2' Rccb will fit an older Quickline box? or if I can still get the older type anywhere? Thanks in Advance, andy
  12. C

    Mk rccb

    Hello I need to find a MK LN 5780 RCCB, rated 80A / 30MA Does anyone know where I might be able to find one or if there is any replacement that would fit? Thanks :)
  13. J

    RCD or RCCB???

    I was examining an RCD and also a RCCB the other day. Both of which had exactly identical circuit diagrams. My question: Are these both the same? If no, where/when would you use a RCCB? :p
  14. G

    Bs4293 rccb

    Hi.. came across a faulty rccb other day (its not quite opening fully when test button pressed) on a split board dating to about 1995. It IS disconnecting supply but the switching arm isnt operating fully so im not confident its disconnecting both poles. Bit of research ive done suggests its...
  15. Golden_Boy

    RCCB on a TT installation ??

    With a 17th edition CU is it still a requirement to have a 100 ma RCCB as an isolator on a TT ?
  16. J

    Rccb rcd

    hellov,can i use a rccb as a over current device as well as Shock protection as i say no but now im wondering ? please help:)
  17. W

    Rccb trips intermittently

    My factory mains input 3 phases RCCB (residual current circuits breaker)4 poles,0.3mA 60A trips intermittently,I did an insulation test(1000V) to the the phases and neutral cables with respect to earth ,the result shows ok,but when I use multimeter to check the ohm reading between the phase or...
  18. S

    rccb tripping (regularly with new oven)

    Customer had comet install a (12kw)standalone commercial cooker. RCCB trips 90% of the time when oven switched on (2kw oven)and also while oven operating. (hob is fine). Cable is 6mm on a 40amp mcb which needs sorting (should be 32a mcb on 6mm says BRegs) and should uprate to 10mm cable(due to...
  19. B

    Problem with crabtree starbreaker RCCB?

    Hello fellow sparkys new to this site and in the need of a bit of advice. I installed a Crabtree starbreaker split board about 6 months ago and once finished and tested it worked with no problems what so ever (well apart form the sockets in the kitchen tripping thanks to an MFI fitted kitchen...

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