He'll flip ya...Flip ya for real...
Close, its placing CTs on high voltage panels to measure electricity. You may ask but doesn't the utility do this when you get electricity from them? They do, but my system breaks it down to how much the lights, HVAC, refr, etc.. is using on individual levels. Also, it measure solar output.That's rough.
"Hot electrical work" means ... the circuit must be hot while you're working on it (like for whatever reason you can't just trip a breaker or something)? IIRC your gig is HVAC, so leaving that sort of thing for specialists seems reasonable to this total outsider.
There is a low chance of causing an arc flash live, but its a damn dangerous effect if it happens. See video below for a demonstration (also dont work on panels in slacks and dress shoes)