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  1. steelypip

    Cord sizing from 003 to motor

    HACR, huh? That's an old breaker - the HACR rating hasn't been required for quite a while. The characteristic curve is on page 20 in this document. As I look at the curve, minimum trip time at 30A should be about 4 seconds. So as long as the start-up surge is a second or so and is <3A, the...
  2. steelypip

    Cord sizing from 003 to motor

    Well, maybe it would and maybe it wouldn't. It all depends on how that particular breaker is biased for trip speed between surge and continuous current. That's a design property (just as with slow-blow versus fast-blow fuses), and you check out the spec sheet to see just what the surge current...
  3. steelypip

    Cord sizing from 003 to motor

    My rule of thumb is always use the smallest breaker you can get away with. That said, inrush might be 250% of rated current, so you need the thing to not trip on starting during the 25+ amp inrush. If you can get away with 10A, great, but I wouldn't expect to.
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