OSG Standard Circuits - 3A lighting

geoffsd:

As we are all using led lamps / fittings now it seems this should be a standard circuit.

3A MCB with 1.0/1.0 cable

Why? 1.00 sq.mm. T&E, method C, has a CCC of 16A.

Why 1.0mm2?


Because it is readily available and commonly found. It is probably the smallest practical size to be used on site that will not easily break or be damaged too much by being chucked in, errr, I mean installed. We could use 1 Amp bell wire or alarm cable, but it may be broken by other trades bashing it, tugging on it or walking over it in their hob nail boots. Also 1.0mm2 allows for future extension to circuits without too much trouble.


But having said that, a 1.0mm2 copper conductor is easily broken if previously accidentally nicked or scored. Perhaps we should consider that.


Z.

geoffsd:

As we are all using led lamps / fittings now it seems this should be a standard circuit.

3A MCB with 1.0/1.0 cable

Why? 1.00 sq.mm. T&E, method C, has a CCC of 16A.

Why 1.0mm2?


Because it is readily available and commonly found. It is probably the smallest practical size to be used on site that will not easily break or be damaged too much by being chucked in, errr, I mean installed. We could use 1 Amp bell wire or alarm cable, but it may be broken by other trades bashing it, tugging on it or walking over it in their hob nail boots. Also 1.0mm2 allows for future extension to circuits without too much trouble.


But having said that, a 1.0mm2 copper conductor is easily broken if previously accidentally nicked or scored. Perhaps we should consider that.


Z.