I,ve wired several single package heat pump units, and i have been getting some grief lately. These units get two circuits, im questioning the heating circuit. I always pull #8 thhn on 40 amp breaker because the strips are rated 7500 watts @240v 31 amps, add 125% for continuous load (which i dont think they would be continuous because they are aux heat strips) and im still under 40 amps. Never had any problems 10+ years until lately ac contracter wants them on 50 amp breaker my guess is because of the blower motor. Im just curious how you guys wire them!