e57,
The plate doesn't really tell you, it just has the Kilowatt rating for 2 different sizes, 5k and below is #10, and 7k is #8 wire.
The wire writing on the #10 pigtail says 10 AWG AWM 3173 125c XLPE.
This 125 degree centigrade #10 wire need 30 amp wire or 40 amp wire.
There is a energy tag that says 390KW max,(which would be #10 wire) so it sounds like #10-3 NM wire would work, unless the insulation rating on the pigtail. means its good for 40 amps.
