My Bosch mitersaw (model 4212L, 15 amp, 2 years old, light usage) is popping its 20 amp breaker often. Actually it’s kind of “moody”, some days it will go through dozens of starts without a problem, other days it will pop on the first start and every start after that (until I get tired of fooling with it). Usually it fails on start up but sometimes it will fail during cutting. I’ve swapped breakers (2 others) – no difference. I’ve blown out the motor with compressed air – no difference. I put it on a 25 foot extension cord (12 awg) on the same circuit – NO FAILURES.
Could it be that the added resistance/impedance of the extension cord limits surges ?? Does this thing have a capacitor start that maybe has gone bad ?
Tom
Addendum: It’s the only device on the circuit.
Edited 3/20/2009 12:19 pm ET by Tom from Owego
Replies
I might question the breaker but you say you have swapped them. You say its a 20A circuit. What else is on with it, and is it running. It could be other things are all grouped together and adding up the math is the issue(add up to a continuous load of > 20A). A 20A breaker should take that saw even with startup unless their is something else going on.
If it moves, tax it. If it keeps moving, regulate it.
And if it stops moving, subsidize it.
Edited 3/20/2009 11:45 am by bones
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