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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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  • 0
    dcbwhaley:

    It is difficult to find small Cus without RCDs these days and I dislike having RCDs in series


    There is a great benefit in having R.C.D.s connected in series. Greater safety afforded due to additional protection, twice. If one R.C.D. becomes sticky or faulty hopefully the other will still operate perfectly.


    Outdoor overhead P.V.C. T&E cable can last many decades if properly supported and not allowed to flex hundreds of times at its ends in high winds. I have seen some last between 20 to 30 years. If subjected to U.V. light from the sun, it may eventually show distress on its out sheath but internally will be perfectly good. Potential bashing by gardening tools or ladders is another matter though.


    Z.


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  • 0
    dcbwhaley:

    It is difficult to find small Cus without RCDs these days and I dislike having RCDs in series


    There is a great benefit in having R.C.D.s connected in series. Greater safety afforded due to additional protection, twice. If one R.C.D. becomes sticky or faulty hopefully the other will still operate perfectly.


    Outdoor overhead P.V.C. T&E cable can last many decades if properly supported and not allowed to flex hundreds of times at its ends in high winds. I have seen some last between 20 to 30 years. If subjected to U.V. light from the sun, it may eventually show distress on its out sheath but internally will be perfectly good. Potential bashing by gardening tools or ladders is another matter though.


    Z.


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