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rcbos

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  1. B

    Steeple RCBO

    I wanted to add a couple of sockets by the windows of a small clothes shop. The easiest way, I thought, was to create a new, radial circuit. The C.U. is a Steeple and there are two spare ways into the board. The existing circuits are protected by RCBOs so I bought a new one from Denmans. When I...
  2. A

    Problems With Niglon RCBOs: Anyone Else?

    I had five out of eight Niglon RCBOs fail to respond to the test button today/yesterday . Three 6A, and two 16A . One of the 16A 'blew' / 'exploded inside', after pressing the button a few times. Wasted half a day because of it :banghead: Anyone else? I'm just wondering if there's a wider...
  3. D

    Trying to find Legrand RCBOs

    Does anyone know of anywhere stocking Legrand RCBOs please? I'm after a 6A and a 20A for a job and cant seem to find them anywhere. I'm in South Wales but would be happy to buy from reputable on-line etc if necessary. Obviously I've tried all my local suppliers and even Screwfix dont have...
  4. A

    Niglon RCBOs Problems Anyone?

    I had five out of eight Niglon RCBOs fail to respond to the test button today. Three 6A, and two 16A . One of the 16A 'blew' / 'exploded inside', after pressing the button a few times. Wasted half a day because of it :banghead: Anyone else? I'm just wondering if there's a wider issue here. (It...
  5. Gazthesparky

    Global Insulation resistance testing

    I was doing a fuse board update the other day and normally I use duel RCD boards with mcb s but instead I used separate Rcbos due to the customer specifying these. I prefer fitting Rcbos due to just that one circuit is disrupted when there is a fault. when quoting for the job I carry out a...
  6. S

    main isolator switch

    Gents, Looking at an install which will include two new circuits, one for lights and another for a ring main. There is no space on existing 16th edition board and customer does not want a new 17th edition board, there is no double pole isolator before it.I am planning on Henley blocking the...
  7. G

    brand new rcbos

    got some brand new rcbos that im looking to sell if anyone is interested 2 x crabtree starbreaker 61/c14030 40A 1 x mem eaton emch120r30c 20A 5 x dorman smith kr1pc3230 32A 1 x dorman smith kr1pc1030 10A all new and boxed open to sensible offers cheers
  8. cliffed

    rcbos

    like your opinions on this ,jus finished a school extension ,everything fine except a couple of loop impedances readings on lighting circuit.These exceeded the appropriate limits,in the regs.All are protected by rcbo"s 10 amp c type,the electrical engineer wants it corrected to comply to regs.We...
  9. P

    Question on Faults regarding RCBOs (Trainee)

    I've got a test and one of the key questions on it is as follows; 230v Single Phase Circuit is protected by a circuit breaker with integral RCD(RCBO), Justify which competent part of the device would operate for each of the following faults: A) Line to Earth Fault of approx. 2.3 Ω B) Line to...
  10. C

    No rcd or rcbos on domestic installation

    Doing eicr on a domestic installation Every thing is looking and testing fine on lacking rcd on circuits not even on power should it be a c3..not to 17th And therefore satisfactory or c1 c2 and unsatisfactory the installation is about 20 years etc
  11. E

    Mk sentry rcbos

    for sale i have x4 6a mk sentry rcbo's. theyre all brand new, one of the boxes got ruined so theres only 3 boxes but they are brand new. £20 each. thanks!
  12. B

    RCBO's on TT system

    Excuse my ignorance,can someone explain to me the problems of using RCBO's on a TT system,and whether and why its unsafe
  13. B

    max zs with rcbos and rcd spurs

    Hi Everyone I was just wondering if anyone knew more about maximum zs readingsa for rcbos if say you have 1. a type C 16AMP bs 61009 rcbo 30ma is the maximum zs 0.92ohm OR IS IT 1667ohm 2. if the circuit came straight from db ran to an rcd spur 30ma protected by a bs 60898 B 16 amp mcb which...
  14. D

    Best make of RCBOs?

    Hi, Looking to source some RCBOs in UK as part of a re-wire here in Gran Canaria (will be done by a retired UK electrician). Looking for good price and performance (happy to pay more for better quality - but not just for a name). Can you experts recommend makes and suitable suppliers. Thanks.
  15. A

    IR Testing RCBOs

    Hi all, got c.u full of rcbos for my upcoming assessment in Jan. My question is can I remove the cables from from the terminations of the rcbo to test for Ir and still keep the assessor happy? The reason I'm asking is because: 1) the probe from my fluke won't reach far enough into the...
  16. M

    Board change and storage heaters

    I dont usually do board changes on old properties unless its a full rewire, However my neighbour wants an upgrade to a 17th edition board, and it would be really handy as a part P reasessment job. The thing is he has night storage heaters on economy 7 which are fed from their own CCU which...
  17. K

    RCBO’s ? ? ? ?

    Time for one of Tony’s hypothetical questions again. But first I need something confirmed. Are RCBO’s SP or DP? I say it’s hypothetical, my recommendation to a friend regarding a new build he’s having done will be influenced by your first answers.
  18. T

    rcbos tripping out for no apparent reason

    i installed a new db into a office 2 weeks ago ,there is a total of 4 circuits , 32a ring main ,16a radial, 6a lights x2 everthing came on allright and i just had time to do zs test on circuits and rcd test both tests where satisfactory ,not enough time to to do ins/res owing the urgency of...
  19. S

    Denmans Curve - RCBOs

    Hi ALL Going to fit a denmans curve CU over the weekend. What RCBOs do they supply for them? i'm guessing steeple? If so what are the quality like of the Steeple RCBO or curve RCBO? Thanks
  20. O

    Small CU with RCBO "bundle"

    Being a tad lazy but have just looked at a 4 way board change. Seems a bit silly to install a 3 + 4 way dual RCD board and I don't like the thought of a single RCD front end either. It made me wonder if there are any CU's on the market with a RCBO "bundle", say 2 x 32A, 1 x 16A and 1 x 6A...

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