welder breaker

Old 05-07-03, 03:43 PM
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welder breaker

I need to install a circuit for a welder that's 220 VAC, 21 amp output. The plug on the welder has 2 vertical prongs (one longer than the other) and a round prong (ground, I assume) below them. I'm sure I can find the right receptacle but am not sure what amperage of breaker I need.
Any thoughts?
Old 05-07-03, 05:51 PM
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See if you can find the plug on thsi chart http://www.bryantelectric.thomasregi...c/sb_chart.htm
then match the recept, wire ampacity and breaker to the plug. This assumes that it is a factory original plug.
Otherwise, the code allows upsizing the breaker to 200% of the effective input current (Article 630).

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