The main panel and subpanels in the old house I'm purchasing are not labeled in any way, and I need lots of electrical work done (detailed in my other post https://advice.thisoldhouse.com/showthread.php?t=117957 ). I'd like to save an electrician's time (and hopefully some money) by making a very basic "circuit breaker panel schedule" of some sort. By which I mean, figuring out which circuits are connected to what. There are only 3 circuits powering the entire house right now.
Can I figure out which circuit goes to which outlets/fixtures by just shutting off that breaker and testing each outlet/hardwired light/fixture by plugging something in and turning it on?? -TotalN00B