Sometimes I am asked if an older or dirty looking residential breaker panel is "safe". I have thought about devising some sort of CB tester to check to see if it will open on overload(not short circuits). I'm thinking various resistors rigged to draw 20, 25, 30 amps,etc. @ 120, 240 volts. You get the idea. Any thoughts, or are these devices commercially available?
I'm not thinking about large scale CB testing, as done with specialized testers.
