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Old 05-25-2011, 09:26 PM   #11
Jan 2009
Seattle, WA
Posts: 216
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Originally Posted by Walker View Post
right. the power cable I use to bring my supply into my control panel is only 8 gauge wiring, but it's got some fancy schmancy insulation on it that allows it to carry 65A.
Wha? Where did you source that?

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Old 05-25-2011, 09:38 PM   #12
Bernie Brewer
Grouchy Old Fart
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Feb 2006
Eldorado, WI
Posts: 7,507
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Originally Posted by bull8042 View Post
Walker pretty much answered your question, but I will add: The size of the wire required in a circuit is dictated by CURRENT, not voltage. Also the type on insulation of the conductor. The wire is sized such that the current flowing through it will not cause it to heat beyond what the insulation can stand without melting.
Keep it simple and refer to amb1935's link and let that calculate the wire size properly instead of guessing. It seems to fall in line with NFPA specs.
And that is also why everything in the circuit must be rated (minimum) for the size of the overcurrent protection.
I like to squeeze the nickle until the buffalo craps-mt rob

"Why don't we get drunk and screw?" Jimmy Buffett

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Old 05-25-2011, 10:26 PM   #13
I use secondaries. :p
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Sep 2005
Cary, NC
Posts: 10,987
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Originally Posted by TheAleMaster

Wha? Where did you source that?
Local company.

They had that stuff on clearance. 3000V/65A cable for $2.20/ft.

They don't carry that particular cable any longer but have other similar stuff.

Super vutron was the stuff.
Ground Fault Brewing Co.

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