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rcbo

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  1. L

    RCD RCBO over current

    Hi, I know the basic differences between MCB, RCD and RCBO. I was wandering what happens to a RCD if the current reaches the RCD's limit? Why do RCDs have got ampere rating if they don't protect against over current? In case of RCBO, how do I know at how much ampere they shut down? Is it the...
  2. Mark42

    6kA (Not 10kA) RCBOs in commercial TP boards: Why not?

    I'm fitting two replacement sub-mains panels as part of a long-term upgrade from split-phase to three phase on a part-domestic part-commercial site (my own gaff). I'm using all RCBOs because I like them, but am less keen on the cost of the commercial variants ... Fellow spark says one MUST use...
  3. littlespark

    RCBO to fit Seimens Stratum200 DB

    I'm looking for a 32A RCBO to fit an old Seimens Stratum200 DB. I'm going to be doing some work in the kitchen first, then replacing the DB later in the year before other works. If its another make, it wont matter for the short time its going to be used. Same reason for not installing a...
  4. Nuno Gomes

    MCB/RCBO/RCD/Fuses - Periodic inspection

    Hi guys. A quick question. - When people do periodic inspection, is it considerad a defect on the intalation if the Protective diveces are no from the same brand? - In a TP instalation using fuses should the 3 fuses be from the same brand? I´m almost sure that I've herad that during my...
  5. Bobby34

    TT system, RCD or RCBO

    At the risk of asking a silly question could someone advise me on the following: Client has a TT system with only half the circuits covered by an RCD, they want a light adding on a light circuit thats currently not covered by the rcd. Now with half circuits not going to meet the disconnection...
  6. Crumps

    General RCBO installation

    Hi all I work on site as a contractor and my colleague was talking to one of the in house electricians on site. He does some work of site for somebody else and the conversation turned to RCBO installation briefly. My colleague stated he was installation last week and this in house electrician...
  7. E

    Class A RCBOs - list of manufacturers

    I'd find a list of manufacturers who are currently producing single module class A RCBOs (and perhaps class A RCDs) quite useful. To my knowledge so far there are: Hager Doepke Schneider Does anyone know of any others?
  8. rolyberkin

    RCBO Test data - 40 milliseconds

    Okay may be a thick question but I have an RCD tripping on 5 x test 180 at 40ms. Pass or fail? GN3 says must not exceed 40ms BBB says within 40ms My tester says computer says no. To be honest I am recommending it be changed anyway but it will be a call back on a new build for another spark so...
  9. E

    Electrician Jobs Changing garage Mcbs for Rcbos

    My garage has a small consumer unit fitted with elcb and mcbs for the socket and lights. After cutting through a circular saw cable it did not take out the garage elcb but the elcb in the house consumer unit. If I get an electrician to changed the mcbs for Rcbos would this prevent the house elcb...
  10. rolyberkin

    How to save money on costly rcbo's

    Well this is a new one on me, new build, very expensive large house, 1 x rfc and radial crammed into in one 20amp rcbo x 2 and multiple circuits in the three 6 amp rcbo's?
  11. rustynails

    RCBO tripping next door RCBO

    Testing an RCD on one rfc upstairs tripped the upstairs and downstairs circuis, which was the RCBO next door to it. Turned off the power to all circuits tested downstairs RCBO on its own RCD failed 1x and 5x tests. Disconnected conductors from this RCBO tested RCD at the board worked ok. Put...
  12. S

    When testing a circuit protected by RCBO, do you test at the DB or furtherst point

    Hi, I just have a few questions in regards to testing an RCBO circuit Is there a requirement to test at either the furthest point or the DB or is it down to the testers discretion. Do the test results differ? What tests on a circuit will trip the RCBO when you are away from the DB. Is it...
  13. J

    RCBO - What would happen if I didn’t connect the neutral of the RCBO?

    Please can someone tell me what would happen if the neutral of the RCBO wasn’t connected would the circuit still work ?

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