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Originally Posted by Christian McArdle
Why do the instructions on wiring a box of mains halogen lamps state
that the minimum cable size is 1.0 sq mm, when the lamps are only a
total of 250 watts (5 x 50w)?
1.0mm is the minimum generally available for fixed wiring installation.
Also, halogen lighting can have a massive inrush current, so a bit of extra
metal can help.
Christian.
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You also have to consider volt drop - dependant upon the length of cable.
This can affect the current rating of the cable. You also need to consider the mechanical strenght of the cable for safety reasons.
thanks