I finished converting one breaker box of a duplex into a sub-panel and had the power company disconnect the power to the half now supplied by the "sub-panel." (Several years ago the "duplex" was converted into a single-family residence.)
A pair of 50-Amp breakers in the main box supply power, 11 inches away, to the new sub-panel. My clamp-on meter showed one leg pulling 25 amps and the other 15 with everything running in the "slave" portion of the building, so I should be okay.
The purpose of this drill is to avoid the "just-because-its-there" charges from the power company - things like "meter rental" and "power delivery charge."
If the thing catches fire or starts laying golden eggs, I'll let everybody know. But for the moment, I figure I'm saving about $25-$30 per month.
Aside--- I engaged the technician in a discussion about Smart Meters. He said they monitor everything: voltage drop, demand by time of day, etc. The power company knows what time you come home, what time you go to bed, whether you get up during the night(!), whether you've been bad or good. Everything.
Spooky.
Aside #2--- I spoke to one of my customers in Washington state yesterday. I told him about the above project. He said he had something similar in that the (small) house he owned next door was only used by his children and grand-children when they came to visit. He had the water shut off in the small cabin and connected the building to his main house with double-female water hose. Saves $17/month, he does.