Posted by Steve@Advance on November 12, 2017 at 16:43:00 from (66.169.147.211):
In Reply to: Bin fan breaker posted by fixerupper on November 12, 2017 at 15:47:02:
According to the motor amp chart, a single phase, 10 HP, 230v motor, under full load, pulls about 50 amps.
I don't know if yours are running at full load, but if so, they are right at the limit. A motor needs a breaker 120% of it's rated amperage, so 50x1.20=60.
Really need to put an amprobe on the circuit, see what is happening. There could be a mechanical issue causing the motor to over amp, or low voltage will bring the amps up.
The #6 wire "should" be good no further than it is run, but #4 would be better.
Another possibility, the buss bars in the panel could be burned from repeated breaker failure. If there is an empty slot, try moving the breaker. Small panels are cheap, may just need to replace it.
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