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Overload protection

MrJack96

If you have a 32 amp feeder feeding 4x 6 amps circuits feed in parallel is there something in the regs that states the cable between the 32amp fuses dosmt have to be rated for 32 amps as long as It meets certain condition? my thinking was as its limited to 6 amps upstream it’s unlikely to get overloaded.

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    I suspect that the O/P is referring to a sub main from a 32 amp OCPD that feeds a consumer unit with only four circuits, each with a 6 amp OCPD. Or electrically similar arrangements.

    In that case I believe that the arrangement is acceptable, but rather poor practice. I perceive a risk of adding extra sub circuits or up-rating the existing circuits to say 10 amps each.

    It would in my view be better to either size the sub-main cable to allow a for a full 32 amp loading, or alternatively to downsize the upstream OCPD to 25 amps.

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    I suspect that the O/P is referring to a sub main from a 32 amp OCPD that feeds a consumer unit with only four circuits, each with a 6 amp OCPD. Or electrically similar arrangements.

    In that case I believe that the arrangement is acceptable, but rather poor practice. I perceive a risk of adding extra sub circuits or up-rating the existing circuits to say 10 amps each.

    It would in my view be better to either size the sub-main cable to allow a for a full 32 amp loading, or alternatively to downsize the upstream OCPD to 25 amps.

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