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Outbuilding consumer unit

Former Community Member
Former Community Member
Coming back to this wretched EICR at my daughter's house


An outbuilding used as an office is supplied by a 6mm^2 T&E carried from the house on a catenary wire.and fused at the house at 32A (RCD protected)

In the garage the the 6mm^2 is split into a 2.5mm^2 for sockets and a 1mm^2 for the lighting

This is coded C2 for the inadequate protection and C3 for using T&E outdoors.  Both of which seem reasonable


Q1  Can I put a two unit CU in the outbuilding with just a 6amp and 16amp MCB or do | need also to provide a two pole switch?

Q2  What do the great and the good think of using T&E outdoors?  Should I replace it with hi-tuf?
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  • Former Community Member
    0 Former Community Member
    The issue with the T&E outside is probably more about its exposure to direct sunlight than its overall "toughness". There is a section on the inspection schedule titled something like "cables where exposed to direct sunlight, of a suitable type or adequately protected against solar radiation", is that where your C3 is entered?


    You don't have to provide an isolator at the outbuilding but you will need to link the two MCB's together on the input side and provide some sort of neutral bar which a 2 way unit with mainswitch makes nice and easy.


    Tom
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  • Former Community Member
    0 Former Community Member
    The issue with the T&E outside is probably more about its exposure to direct sunlight than its overall "toughness". There is a section on the inspection schedule titled something like "cables where exposed to direct sunlight, of a suitable type or adequately protected against solar radiation", is that where your C3 is entered?


    You don't have to provide an isolator at the outbuilding but you will need to link the two MCB's together on the input side and provide some sort of neutral bar which a 2 way unit with mainswitch makes nice and easy.


    Tom
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