I have 10 AWG wire run to a 2 gang box (10-2 wire). It is 1 circuit protected by a double pole 30 amp breaker. Since it is 2-gang, can I use 2 30 amp twist lock receptacles (specifically the Hubbell HBL2620 30A 250V receptacle) in the box both connected to this same circuit?
The 2 machines I would be plugging in would never go above 30 amps, more like 23 amps combined if run at the same time.
Or should I just use 1 30A receptacle and not try for two? I wasn't even sure if these receptacles were designed to be linked together on the same circuit in the same box like normal household 120v outlets were.
Best Answer
This keeps coming up: The question of whether you can put more than one receptacle on a 30A circuit.
All the receptacles must be 30A. (NEC 210.2B3)
It's very surprising to find 30A plugs on machines that fall considerably short of 30A. Generally they use a 15A or 20A plug if they are able.
I'm not sure you can fit two of those connectors two abreast in a 2-gang box. That's a mighty tight fit, and I'm concerned with the screws striking each other.
It'll be tight and awkward to grab, and depending on the plug, they might interfere. I'd go a double-gang bolted to a single-gang with a conduit nipple.
Big receptacles don't have 2 screws, so you'll need to pigtail them. The extra wire count will mean you'll have a lot of box fill, in both the Code requirements and in the actual sense. You'll need a very deep box.