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Ring Circuits - Fixed Electric Heating

Former Community Member
Former Community Member

Dear All,

I have been asked to review a proposal for an apartment where it is intended to use a ring circuit (4.0mm T&E) to supply 4 No. fixed electric panel heaters in the living room @ 1.5kW each (6kW).

Does this meet the BS7671. Regs/On-site guide refer to ring circuits and 13A sockets.

Any guidance would be appreciated.

Thanks

Parents

  • Since there is only mention of heaters 4 x 1.5KW = 6KW and not additional sockets I would say this is OK and could be considered OK even with 2.5 T & E if design considerations allow.

    It might not be our first choice but it could be one way of doing it

  • in reply to ebee

    I am puzzled why you are asking.

    If there is (only) 25A loading and a cable capable of 37A (assuming no derating) why is there a need for a ring?

    There is no mention of the OPD rating but if it is not higher than the cable CCC then the special circumstances of 433.1.204 (which is still written for BS3036 fuses) have nothing to do with it.

    Any conformant radial circuit could be extended back to the CU for no reason.

Reply
  • in reply to ebee

    I am puzzled why you are asking.

    If there is (only) 25A loading and a cable capable of 37A (assuming no derating) why is there a need for a ring?

    There is no mention of the OPD rating but if it is not higher than the cable CCC then the special circumstances of 433.1.204 (which is still written for BS3036 fuses) have nothing to do with it.

    Any conformant radial circuit could be extended back to the CU for no reason.

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