electric motor keeps tripping circuit breaker
electric motor keeps tripping circuit breaker
(OP)
I'm using an electric floor burnisher with a 110v motor. The voltage spikes up very high when first turned on then goes back to an exceptable level. The voltage goes up and down during operation until it eventualy trips the ciruit breaker. Does anyone know how I can fix this problem? Thanks!





RE: electric motor keeps tripping circuit breaker
"Venditori de oleum-vipera non vigere excordis populi"
RE: electric motor keeps tripping circuit breaker
Successive start/stop operations can overheat the breaker and eventually trip it.
RE: electric motor keeps tripping circuit breaker
RE: electric motor keeps tripping circuit breaker
The voltage spikes up very high when first turned on then goes back to an exceptable level. The voltage goes up and down during operation until it eventualy trips the ciruit breaker. Does anyone know how I can fix this problem? Thanks!
RE: electric motor keeps tripping circuit breaker
Also 14/3 cord is too small to meet NEC, it should at least be 12/3.
RE: electric motor keeps tripping circuit breaker
If this is a fixed location, try a different outlet on another circuit.
But as others have said, basically, you need a larger circuit breaker upstream. If it's on a 15A circuit, a 20A circuit could help. The 20A circuit requires #12 wire. To go above that, you'll need even bigger wire and special receptacles and plugs.
RE: electric motor keeps tripping circuit breaker
just a code clarification, and I know that you know, the motor brach circuit conductors need to be only 125% of FLA while the branch breaker can be up 250% of FLA. This is one of the exception in NEC rule permitting breaker larger than the condcutor ampacity. So in this case 1.25*15A=18.75A and #12 AWG is fine for the cord with up to 40A CB. The receptacle can not be rated more than 20A though. ( I am assuming the cord is plugged in to a receptacle)
If the CB is wired to a receptacle rated more than 20A then of course you need larger size wire to match the breaker.
RE: electric motor keeps tripping circuit breaker
Yes, I was talking about the branch circuit conductors serving the receptacles. I should have been a little more clear.
RE: electric motor keeps tripping circuit breaker
Buy a larger guage cord (or a much shorter one) and you will probably be fine.
"Venditori de oleum-vipera non vigere excordis populi"