What is the proper wire type/size and conduit size for an a/c circuit?
1/2 inch conduit would be fine with THWN wire. If the conduit is exposed it will need to be schedule 80 pvc. If the conduit is under the house it could be schedule 40 pvc. With a 11 amp load 14awg wire size is more than enough with a 15 amp breaker. If you want to put in a 20 amp line 12 awg wire. if you do install a 20 amp with a single outlet code requires that outlet to be a 20 amp outlet. If you use a duplex outlet a 15 amp outlet would be code compliant.