Odd Problem - Any Ideas?
I'll try to make this as short as possible.
I've had the same setup in my garage for 8 years.
50amp 240v to a sub panel in the garage. Several 20amp 120v circuits running off of it.
My compressor just "quit" working about 2 weeks ago. It was cheap and 8 years old, so I figured it just gave up. Bought a new compressor, plugged it in and the same thing happened, motor spun very slowly, wasn't working. Eventually the breaker kicked off.
I started up my generator, plugged the compressor in, and it ran like a champ. Obviously something wrong with the electric.
Thinking there might be a short somewhere in the garage, I kicked all the breakers off except one that was dedicated to a single plug. No luck.
I tried a plug off the other 120v circuit, same problem.
I pulled the cover off the panel and tested the voltage on each side and they were 120v. I tested the 240v connections, and they were correct. I made sure all connections were tight.
All the lights, garage door opener, forced air heater, etc still work without issue.
I'm thinking maybe there's a ground problem, but not really sure how I'd go about testing that.
Any other ideas? Thoughts?