Hello Jerry,
Based on 1999 NEC I’m going to give my opinion and if anyone sees I’m wrong please step in.
Section 440-4(b) says the manufacturer shall provide a nameplate with the minimum supply circuit conductor ampacity, along with other info. 110-3(b) requires equipment to be installed to this minimum.
Since you say the nameplate info given is, “Minimum Circuit Ampacity: 22 amps” I would use #12 AWG CU and I believe this would be code compliant with (310-16).
[This message has been edited by MikeW (edited 07-13-2002).]
