NYC. We have 208V "Wye" 3-phase.
I have two devices - a dryer and a water heater. Each takes 208V single-phase. I am also considering an air conditioning unit that will also take 208V. All are 23A draw for a 30A breaker.
But the conduit to their location already has 6 wires I cannot change, and only 3 wires remaining before we'd have to pull out all the wires and upsize for a 310.15(b)(3)(a) derate -- and the conduit won't physically fit that.
My question is: Can I run a single 3-phase circuit (3 wires, neutral not needed)... and wire the dryer from pole L1 to L2, and the water heater from L2 to L3?
I know how to do that with a subpanel... my question is how to do it without a subpanel. Can I put those 2-3 loads on one circuit? How would I size the breakers?