I just wanted to chime in here as an ex-industrial electrician that also held an electrical contractor's license for residential work before getting into softwa

I just wanted to chime in here as an ex-industrial electrician that also held an electrical contractor's license for residential work before getting into software. People do their own electrical work all the time, and the insurance company doesn't know (and probably doesn't care). The reason they don't care is: unless you have a > 100 year old house with knob and tube wiring, you have to go to _great_ lengths to set it on fire with electricity. Like, you have to be deliberately trying to burn your house down (we're talking connecting a hot and a neutral wire next to a gasoline soaked piece of wood and turning on the breaker). For the most part, the biggest risk to doing your own electrical work is getting electrocuted, and 120V usually won't kill you (but it does hurt).