Electrician Dad gives his Son a Quiz on Circuit Breaker Capacities and Panels, Thoughts?

What is the most amount of breakers you can put in an enclosure? 84? 84 is correct. What is the average? Average just say is 40. Residential, it's 40. A lot of times in residential you'll see 20, 24, and 40. Why is it? >> Just the national electric code adopted that and this is industry standard. So, some things are by history and by standards. Cuz I think that's one of the reason. >> Can you put 40 tandems in a residential panel? And make it 80? Yeah, I don't see why not. You cannot. Why is that? >> Cuz panel is designed, if you look at this circuit breaker, and if we take it a standard circuit breaker, you can see there's a a wider opening here and it's deeper. This is shallower, Right. so this needs a specific spot or a specific panel that's rated for tandem. Oh, okay. Often times a panel will accept a few, right? But not all of them. And that's because safety, because otherwise people would just do that. They would put all these little tandems in and fill up and put 80 spaces. So, you can't do it. All right, I'm going to give you a little test, right? >> Yeah.