I've been asked by a landscape contractor to provide power for a cord connected transformer and some low voltae lights. When I arrived on site it was obiouse that thier 170'(1st light at 92')run and #12 wire would not cut it. I've run some VD calcs and have come to the conclusion that the transformer needs to be within 10' to 20', however, I don't know what the axceptable VD on a 12v lighting circuit could be?
7 lights @ 35w each
12v transformer w/two poles 350w each
70' one way length from 1st light to last
Could some give me some advice on this please?