Originally Posted by
Gary Curtis
An auto paint supply dealer who sold me my compressor advised against a 220v extension cord. They are sold by Home Depot and such places, but are usually 12-feet or less. I have one of the shorties, and use it at times with my 4HP 220v compressor. It does get warm to the touch if I'm putting a heavy demand on the compressor.
Along this line of thought, in California it is against the electrical code to have two separate 220 machines plugged into the same circuit simultaneously. Either one machine at a time, or a dedicated 220 circuit per machine. I believe the electrical code is now uniform throughout the country.