In article ,
Pedge wrote:
I could just use 1.5mm like I did last time but as somebody gave me a
left over reel of 1mm cable i'm going to use this instead.

This 1mm cable will be used to power 3x 25watt kitchen wall unit
underlighting and a seperate 1mm cable will power 3x 50watt halogen
downlights. Both 1mm cables will be joined to the 1.5mm live current into
the room.

Kitchen unit lighting= 3 x 25w= 75w= 75w / 240v= 0.3125A
Halogen downlights= 3 x 50w= 150w / 240v= 0.625A

Total ampage = 0.9375 Amps

Cable load = 14 Amps

So in the above calculation it's ok.

As was said by Stefek, in general you don't have to worry about cable
sizes on a domestic 5 amp lighting circuit as either 1.5 or 1mm will be
fine. However, it's worth totalling up the entire load to avoid having the
fuse or breaker go - it's quite easy these days to exceed 5 amps for one
floor in a house.

But do be aware the 14 amp rating for 1mm is under ideal circumstances
where the cable is kept cool by adequate ventilation - it's not an
absolute rating for all circumstances. However, for your application it
will be just fine.

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*Warning: Dates in Calendar are closer than they appear.

Dave Plowman London SW
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