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Conduit singles

Joined
16 Feb 2014
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Gwent
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United Kingdom
Is it acceptable to use 2.5mm live and neutral and 1.5mm earth singles in PVC conduit to feed sockets on a ring?

Thanks
 
Yes, it complies with the adiabatic equation as opposed to a tabulated value.
Same reason as having a 1.5 CPC in a 2.5 twin and earth.
 
Convention is to use the same size in conduit/trunk (in smaller csa circuits), but reducing the size is fine as long as it complies with table 54.7 or the adiabatic equation.
 

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