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  1. Pete999
    Offline

    Pete999 Forum Mentor

    Location:
    Northampton
    Business Name:
    None
    I have searched and am at a loss, does anyone know the regulation number (if there is one) regarding fitting MCBs into a Consumers Unit that is of a different Manufacturer, as an example only, I have a BG CU and the only replacement MCB I can find is a MEM one. There is a thought that this is not allowed under BS 7671, anyone got any views, or information?
     
  2. Leesparkykent
    Online

    Leesparkykent Super Moderator Staff Member Super Moderator

    Location:
    Kent
    There’s thousands of BG circuit breakers on the market. They are still in manufacture today.

    LMGTFY - http://bfy.tw/Kj7i
     
  3. Pete999
    Offline

    Pete999 Forum Mentor

    Location:
    Northampton
    Business Name:
    None
    It was an example Mate that's all, OK I'll change the make, to an X consumers unit and a Y MCB
     
  4. westward10
    Online

    westward10 In echoed steps I walk across an empty dream. Staff Member Moderator

    Location:
    Northamptonshire
    Not got the BBB Pete?
     
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  5. cprfenom
    Offline

    cprfenom Regular EF Member

    Well it is a regulation under 7671, but I wonder if you can provide evidence that it is of equal quality etc that it could be allowed as a deviation of regs?
     
  6. SparkyChick
    Online

    SparkyChick Making a banana smoothy for my fave gorilla Staff Member Moderator

    Top Poster Of Month

    Location:
    South Wales
    Business Name:
    SparkyChick
    Suggestions are made in several places....

    536.4.201 Fault current (short-circuit) ratings
    The relevant fault current (short-circuit) rating of the assembly should be equal to or exceed the maximum prospective fault current at the point of connection to the system.

    The terminology used to define the short-circuit rating of an assembly is given in the BS EN 61439 series as follows:
    - rated short-time withstand current, Icw
    - rated peak withstand current, Ipk
    - rated conditional short-circuit current, Icc.
    The assembly manufacturer’s ratings and instructions shall be taken into account.

    For an installation with a 230 V single-phase supply rated up to 100A that is under the control of ordinary persons, switchgear and controlgear assemblies shall either comply with BS EN 61439-3 having a suitable fault current (short-circuit) rating for the maximum prospective fault current at the point of connection to the system or be a consumer unit incorporating components and protective devices specified by the manufacturer complying with BS EN 61439-3, including the 16kA conditional short-circuit test described in Annex ZB of the standard.

    536.4.203 Integration of devices and components
    The relevant part of the BS EN 61439 series shall be applied to the integration of mechanical and electrical devices and components, e.g. circuit-breakers, control devices, busbars into an empty enclosure or existing low voltage assembly.

    In low voltage assemblies to the BS EN 61439 series, e.g. consumer units, distribution boards, incorporated devices and components shall only be those declared suitable according to the assembly manufacturer’s instructions or literature.

    NOTE 1: The use of individual components complying with their respective product standard(s) does not indicate their compatibility when installed with other components in a low voltage switchgear and controlgear assembly.
    NOTE 2: Incorporated components inside the assembly can be from different manufacturers. It is essential that all incorporated components should have had their compatibility for the final enclosed arrangements verified by the original manufacturer of the assembly and be assembled in accordance with their instructions e.g. the consumer unit, distribution board manufacturer. The original manufacturer is the organization that carried out the original design and the associated verification of the low voltage switchgear and controlgear assembly to the relevant part of the BS EN 61439 series.

    If an assembly deviates from its original manufacturer’s instructions, or includes components not included in the original verification, the person introducing the deviation becomes the original manufacturer with the corresponding obligations.


    And it's included in section 7 of the model schedule of inspections.
     
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  7. Devonchris
    Offline

    Devonchris Regular EF Member

    Location:
    Devon
    Business Name:
    O
    Old thread here that might be of interest?

     
  8. Leesparkykent
    Online

    Leesparkykent Super Moderator Staff Member Super Moderator

    Location:
    Kent
    There a specific reg in the BBB and prob chapter 51 BYB or near will have something about manufactures instructions/type tested etc. I haven’t got either to hand.
     
  9. Pete999
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    Pete999 Forum Mentor

    Location:
    Northampton
    Business Name:
    None
    Thank you SC
     
  10. anthonybragg
    Offline

    anthonybragg Electrician's Arms

    Location:
    NORTHAMPTON
    Business Name:
    CHARLTEC ELECTRICAL LTD
    NO, he has only got IET on-site guide.
     
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  11. Pete999
    Offline

    Pete999 Forum Mentor

    Location:
    Northampton
    Business Name:
    None
    Thanks
     
  12. Murdoch
    Offline

    Murdoch Electrician's Arms

    Location:
    Woking
    This is going to cause panic with PV and ELV installers - they are the worse for fitting "anything" in CU's ...........
     
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