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S.W.A. Cables in Parallel.

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I have installed two 3 core 6.0mm2 S.W.A. cables in parallel for ease of installation, fused at 60 Amps.  The run is about 20 metres. They are single phase connected. I use Brown as L, Black tagged blue as N and grey oversleeved green and yellow as C.P.C. in each cable.


I have bonded the armour at each end and it is earthed at the origin of the circuit.


I have a niggling feeling that I have missed something. Is the above o.k?


Z.
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    mapj1:

    The only problem with cables in parallel is what happens if the current share is unequal - actually a reasonable length helps here, on a short length the details of termination can be significant. So long as both armours, or more accurately any one would operate  the ADS if either cable was spiked, then it is fine. I'd be inclined to perhaps tie the ends together in some way, so they form a pair at the terminals, but that is only so it does not confuse any future person looking at it.

    Actually with 6mm and 60A you can have it quite a long way out of balance before it matters - it is a similar problem to the current share on the ring final, and we do not normally fuse the individual limbs there.

    Mike.


    The two cables are of exactly equal length and supply a consumer unit. 4D4A does not rate 6.0mm2 anywhere near to 60 Amps.


    Z.


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  • 0
    mapj1:

    The only problem with cables in parallel is what happens if the current share is unequal - actually a reasonable length helps here, on a short length the details of termination can be significant. So long as both armours, or more accurately any one would operate  the ADS if either cable was spiked, then it is fine. I'd be inclined to perhaps tie the ends together in some way, so they form a pair at the terminals, but that is only so it does not confuse any future person looking at it.

    Actually with 6mm and 60A you can have it quite a long way out of balance before it matters - it is a similar problem to the current share on the ring final, and we do not normally fuse the individual limbs there.

    Mike.


    The two cables are of exactly equal length and supply a consumer unit. 4D4A does not rate 6.0mm2 anywhere near to 60 Amps.


    Z.


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