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110V 16A sockets in a ring arrangement

Tom D

I am planning to make a 110v circuit containing up to 10 x 16A 110V single sockets. The circuit is up to 100m long. Is 32A MCB type C and H07 4mm2 will be ok for it or I need to take into consideration of using RCBO instead and calculate voltage drop to size required cable properly?

  • 0

    It would also be "unusual" to have 32A overcurrent protection for 16A sockets for unfused plugs -  conventionally 16A or sometimes 20A would be expected.

    100m is quite long for a 110V circuit - (not sure if that's the circumference of the ring or the distance to the furthest point, but either way) v.d. might be quite a limiting factor. If it's fed from a transformer from a 230V part of the installation, you'd have to consider v.d. in not only the 110V part but the 230V part and the effect of the transformer as well. A 230V circuit and local transformers might start to look more attractive.

       - Andy.

  • 0

    If it's a ring final circuit, this is a non-standard circuit arrangement, and the designer is therefore responsible for determining that overcurrent (overload and fault current protection) is addressed correctly for all possible combinations of current sharing. would it be easier to split into 2 no. 16 A or 20 A 50 m radials ?

    When you ask about C32, is that for ADS or overcurrent?

    What is the arrangement of the circuit (is it TN or RLVS)?

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