Breaker tripping and capacitor burning
I live in Japan and have an unnamed 10gal air compressor I purchased from a friend for $60 a couple years ago. It is rarely used, but I booted it up yesterday (with an extension cord), and magic smoke came from the wiring enclosure. A small capacitor had burnt up.. luckily exactly where the ratings and part# normally are, so I cannot tell what type it is. (This motor has another capacitor piggy-backing on the side of the case as well, but no smoke from it).
I have a slightly smaller motor laying around, and rewired the cap. (110vac 270-324MFD)I move the compressor from my work area, and plug it directly into the outlet. Runs fine for about 10-20 seconds, then trips the 15A breaker on the enclosure body. I let it cool down a bit, and after several re-tries, I notice the cap I replaced is extremely hot, and oil is starting to pool out of the top, and down the sides of it.
No inductive amp meter here.. only 10vdc for automotive use, so I cannot test the draw. The house breaker did not trip.. only the on-board 15A did.
Local power is 100vac/60Hz, and I've run the compressor before without issue on the same outlet. By size alone, I'd say the motor is 2hp. If it wasn't 100vac, I'd say it looks to be the size of a 5hp.
Any help would be appreciated.