Presumably if wiring a circuit with singles in conduit it's OK for the cpc to be the size that it would be in T&E, e.g. 1.5mm² with 2.5mm² or 4mm² L&N, 4mm² with 10mm² L&N etc?
brown-nought said:If I recall correctly, the CPC can be smaller than live conductors provided it complies with the adiabatic equation.
Err.... Me. I would.Lectrician said:BAS - who would wire a shower in conduit and singles?
the adiabatic is NOT the only consideration you must consider the earth fault loop as well (must be low enough to take out the breaker)Lectrician said:The adiabatic can give some strange figures for cables that are oversized due to volt drop. I seem to remember a cct that was fed via 95mm, but a 10mm CPC would do, that seemed pathetic, and a 50mm was installed.
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