I've been throwing breakers in my home office (which you can see the updated pics in the phone gallery later this week I'll upload them) ... so I did some research and I found this video below posted on YouTube by this pretty down-to-earth Yankee who's talking about a certain type of voltage/amp meter with an induction type of reader at the top of the tester. Looks like it works pretty well ... I guess you can tell I'm no electrician, never have seen one of these before. Anyhow, I'm 90% certain that the breaker is getting thrown by a bad battery backup (which is like 5 years old now) and it's turning on and trying to draw. It's got a MAX of 22 volts output, so I'm pretty sure that's what's causing the issues, but I still want to test it all out. The circuit is a 15 amp bedroom circuit that I have turned into a home office and I'm starting to think that I should maybe wire this room on it's own circuit just so I can not have issues like the power going out, like it did this morning when the circuit breaker tripped. My last electrical meter got lost somehow, so I need this to be a good all-purpose unit for automotive, rv, trailer and household use.