Reno, I was just getting ready to post about the breaker size. Where do you get the 5x at? I am using an old code book, but I go to the table that tell the Maximum rating of the motor branch circuit short circuit device and it tells me I can go 250% of the full load amps, which in this case
250% of 15.4 amps is 38.5 amps, and if I figured it right I should be able to go to a 40 amp breaker. Tell me if I'm wrong, it's been a while since I been to code class and I don't work with motors all that much. The motor is only on a 30 amp 3 phase breaker now. I did notice at one point the in rush current was 44 amps and this could be the reason of the breaker tripping. Most other checks I did it was 33 amps which still might cause the breaker to trip. Of course this set up is a old set up and has been there for years. Question is why has it started to cause problems now, unless of course the 30 amp breaker is weaker. It does show signs of age.. Thanks again
