red and black are your hots: 110vac each. white is your neutral: that's your widowmaker. green is chassis ground or just ground. without seeing what you're trying to wire up, I'd say, don't fuck with it, unless your going for a Darwin award.ok, im wireing a 250w ballast to 220v. the 220v wire im tapping into is for the dryer and has red,white,black, green wires. how do i wire the ballast to that, it dont have but one Com wire for that voltage