On Friday, January 16, 2015 at 12:59:49 PM UTC-5, Cydrome Leader wrote in rec.crafts.metalworking:
In testing you normally use black, red and blue for live low voltage and brown, orange and yellow for high voltage connections.
For low voltage, black fingernail polish or tape for 'A' connections, red for 'B' and blue for 'C'. Use green for Ground-only connections and white or Grey for neutral connections.
For high voltage, brown fingernail polish or tape for 'A' connections, orange for 'B' and yellow for 'C'. Green is still used for Ground-only connections and white or Grey for neutral connections.