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Adding spurs to immersion heater circuit

MikeD

About 25 years ago we had a shower fitted and the plumber added a fused spur to the immersion heater circuit for the pump.

I want to upgrade our heating system by fitting an ebus controller in the airing cupboard. This needs a mains supply and there is no accessible ring circuit. Is it permissible to add another fused spur to the immersion circuit?

Mike

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    Depends on the details (amount of spare capacity, consideration of effects of a fault, environment and so on), but there's no fundamental prohibition. It may not be a "conventional" circuit arrangement, but the regs don't demand that it must be.

    Airing cupboard often aren't ideal locations though - typically they're too warm for BS 1363 accessories (I think the limit is of the order of 25 degrees average over 24 h) - you may well get away with it for small loads, but be aware you're probably outside of official specifications.

    Likewise electronics prefer cooler locations for long term reliability.

        - Andy.

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  • 0

    Depends on the details (amount of spare capacity, consideration of effects of a fault, environment and so on), but there's no fundamental prohibition. It may not be a "conventional" circuit arrangement, but the regs don't demand that it must be.

    Airing cupboard often aren't ideal locations though - typically they're too warm for BS 1363 accessories (I think the limit is of the order of 25 degrees average over 24 h) - you may well get away with it for small loads, but be aware you're probably outside of official specifications.

    Likewise electronics prefer cooler locations for long term reliability.

        - Andy.

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