240.4 tells us the overcurrent protection required for small conductors unless otherwise permitted in 240.4 (A) thru (G). 240.4(G) refers us to 440, Parts III & VI for refrigeration equipment. 440.22(A) allows the use of an OCPD 175% of the motor compressor rated load.

Situation is a roof top unit nameplate reads "Minimun Circuit Ampacity 26 amps" and "Maximum Fuse or HACR Circuit Breaker 40 Amps" The unit is wired with #10 copper fed from a 40 amp HACR circuit breaker.

Is the installation compliant?