high-current single-pole breakers.
Alright, someone just handed me a single-pole 40A breaker... and the only thing that comes to mind is: WHY?
We can't legally install a 40A general-use circuit. What real-world large load would I ever use one of these for? Once you need more than a 20A circuit @ 120, why wouldn't the manufacturer have just gone to 240?
The breaker I've been handed is a quite-antique wadsworth, the kind whose handle SLIDES, so I will accept that its use is equally-archaic, but it still eludes me... and I've seen a 30A single-pole QO before, so apparently they're still around...