I used some computer server-class power supply cables that were pretty hefty. The colors were non-standard - brown for hot, blue for neutral, and green for ground.
I guess it's not a bad idea to check your wires with a continuity tester when you get these odd colors or whenever you're not sure. The ground is pretty obvious, but the hot will go to the small slot on the polarized outlet and the neutral will go to the larger slot on the plug. And then you have to hope your outlets are wired correctly.
steve