4mm Ring Rather Than 2.5mm Ring??

ebee · 25 Oct 2009

A spur from a ring is 2.5 with a 32A MCB (twin or single) and that`s allowed.

A single point on a MCB of 32A radial is just as safe.

A ring final of 32A must be 2.5 min and sometimes 4.0 min.

Trazor · 25 Oct 2009

FourPoleRelay said:
The main contractor is making a fuss about the ring being a 4mm2 one

Why are you concerned, the extra cost will be negligible..

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4mm Ring Rather Than 2.5mm Ring??

ebee

Trazor

DIYnot Local

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