This is interesting.
I still have some T&B 20A 3-pole plug-in CB’s in stock somewhere. I think maybe some Siemans QP too.
Are manufactures not making 3-pole plug-in breakers anymore?
This excerpt from the 2007 UL white Book (DIVQ) doesn’t seem to limit the number of poles or mention receptacles by name, but it also doesn’t appear to exclude them.
“Multi-pole common trip circuit breakers rated 120/240 V ac are suitable for use in a single-phase multi-wire circuit, with or without the neutral connected to the load, where the voltage to ground does not exceed 120 V.”
