Your friend is correct. 6/3 with ground romex is correct. According to the new codes you will need the four wire cable because this is a new installation. Just be sure you use copper, because I have seen some people try and get aluminum cable, and I highly do not recommend that.
Now for your convenience, I have made you a wiring diagram which shows you exactly how to wire this up. In the photo you will see that I use a black and red wire, that is only for illustrative purposes only. In reality both hots will be black. So just keep that in mind.
Here is your diagram:Please reply back to this post if you need further assistance:
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Wednesday, January 18, 2012 5:56:23 AM