I think Scott is referring to type NM (Romex) cable. You can us the two wire
(Black and White) with a bare or Green ground wire for strictly 220V
circuits. It may be run in metal or plastic conduit. Metal conduit must be
grounded with an accepted method. However it is necessary to reidentify the
White wire with colored (Other than White, Green or Gray) tape at ALL
Appliance current, in AMPeres will determine the wire size and current
protection. Continuos load can not exceed 80 % of wire capacity. For all
110/220V circuits 3 insulated wires (Two colored and one White or Gray)
along with a ground wire is required.
BOY, Brown, Orange and Yellow with a Gray or White neutral is being
recognized for 120/277V 3 phase circuits, But not mandatory. Green, White or
White striped and Gray are still the only designated purpose colored wires
Hope this helps.
useours, yours won't work
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