I know the two poles are common because of spas and the like, but a single pole gfci 30 are probably hard to find. Didn’t think about the A/C’s too. How often has that happened to make that big of a change in the code?While it does cover the RV receptacles, it was aimed at air conditioning equipment. The substantiation was about a person who was killed from touching an energized condenser unit at a dwelling unit. Eaton, Square D, Siemens, and GE all have single pole 30 amp GFCI breakers. Two pole GFCIs up to 60 amps are readily available.
The panel is fed with a 100 amp 240 volt main feed and has several branch circuits smaller than 50 amps within the enclosure to feed multiple heaters. We cant add several small GFCI breakers because that would void the UL listing as it wont match what is on the wiring diagram. The manufacturer is doing the best they can, but UL has their hands tied. GFCI breakers haven't been tested in their panels by them or UL, so that's why we have to find a solution that doesn't involve modifying the interior of their panel.The new rule in the 2020 NEC only applies to outlets fed by a branch circuit rated 50 amperes or less.
The panel is fed with a 100 amp 240 volt main feed and has several branch circuits smaller than 50 amps within the enclosure to feed multiple heaters. We cant add several small GFCI breakers because that would void the UL listing as it wont match what is on the wiring diagram. The manufacturer is doing the best they can, but UL has their hands tied. GFCI breakers haven't been tested in their panels by them or UL, so that's why we have to find a solution that doesn't involve modifying the interior of their panel.Is the 100 amps a feeder to a panel that will have separate branch circuits to the heaters? You may be able to use individual gfci breakers for each circuit rather than use a 100 amp gfci
Another issue with the heaters, is the outputs are usually controlled by scr’s, so putting gfci breakers on the load side may not play well with the electronics in the breakers.
