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Old 11-16-2011, 02:58 PM
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It's going to depend on the size of your compressor motor. a 3hp single-phase motor @240v will draw somewhere around 18A or so. You'll need to check the data plate on the motor itself for HP/amperage draw. The 140 will pull about 15A@115V and you'll also want to take into consideration anything else that you'll be running off the panel....lights, fans, heaters/AC, etc. If after adding up all the numbers, you're comfortable with the 60A breaker (that it also gives you room for expansion), then it shouldn't be a problem. You'll probably want to consider oversizing the feed wire, depending on the actual distance between the boxes.
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