690v 3 phase application lead wire rating
690v 3 phase application lead wire rating
(OP)
Stupid question, but I have an application going into a 690v 3 phase system, so since the actual voltage to ground on any of the 3 legs is 690/sqrt3 = 398.4v using 600v rate wire is ok right?





RE: 690v 3 phase application lead wire rating
My code requires wire to be rated for the highest voltage present, NOT the highest voltage to ground.
Bill
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"Why not the best?"
Jimmy Carter
RE: 690v 3 phase application lead wire rating
Waross, if each individual wire is rate at 600v between the inner conductor and (in this case) the out SST armor (i.e. ground), then having 2 cables next to each other (i.e. the 690v) has 2 layers of said insulation. The problem comes in that this is specialty wire that is not available in 1kV rated. Is my thinking way off here?
RE: 690v 3 phase application lead wire rating
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: 690v 3 phase application lead wire rating
Keith Cress
kcress - http://www.flaminsystems.com
RE: 690v 3 phase application lead wire rating