Reply by Fred Hargis

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Posted on 220 cord sizing

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Fred Hargis

5804 posts in 3035 days

#1 posted 07-11-2014 04:30 PM

BigBlock – I think I get what you are saying as far as burning the shop down. If the breaker is 20 amps, and I for some reason pull 30 amps, the wire will catch on fire (in theory) before the breaker trips, and that is how my shop burns down. Correct?

- TheWoodenOyster

Not bigblock, but you can’t pull 30 amps through a 20 amp breaker, that’s what saves you. But put #12 wire on a 30 amp breaker and it could heat to the point of catching fire. Point is, the wire can never have a smaller amp capacity than the breaker (the reverse is OK). If you are using a 30 amp breaker, you need #10 wire.

-- Our village hasn't lost it's idiot, he was elected to congress.

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