Wire size for 220 circuit


Old 10-11-03, 06:32 PM
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Wire size for 220 circuit

I have a home woodworking shop in my garage and need to run a new 220 circuit for a dust collecter. Max draw is 10 amps at 220. Is a 20 amp breaker and 12-3 w/ groung addequate or do I need to go to 10-3 w/ ground. The total length of the run will be approx. 50-60 ft. from the main panel in the basement.
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Old 10-11-03, 06:39 PM
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First of all, you probably only need x/2 rather than x/3. A 220-volt tool that has no 110-volt component has no need for a neutral wire. If you run x/3, you'll probably find that you have no place to connect the white wire.

Next is that wire size depends on amperate and not voltage. So 15-amps needs #14 wire, whether 110-volt or 220-volt. If the dust collector needs 10 amps at 220 volts, then you only need a 15-amp double-pole breaker with 14/2 wire. 60 feet isn't far enough to make any adjustments. You can run 12/2 if you want, and that would take care of future needs for a larger dust collector.

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