I'm installing a subpanel that will supply only 240V 2-pole devices. I'm positive I never will need the capability to run 120V (1-pole) devices. Am I required to run a neutral wire to the subpanel? Please don't provide answers that recommend I do it "either way" for future-proofing. I only want to know what is code-required.
The code for feeders talks a bunch about the required size of feeder grounded wire, but as far as I've seen it never comes right out and states that it is required to provide a grounded wire. I am of course providing a grounding wire.
Best Answer
Its fine, no different than the main feed to your house. NEC(1999) article 200 is "grounded conductors" and 215 is "feeders".
and so
Meaning that you need to use double pole switches and breakers. (that disconnect both wires, as opposed to common light switches that only disconnect one of the wires.)