While trying to justify a 40 amp circuit breaker for my 5hp, 3 phase, 240 V air compressor I came across a chart of unknown origin that called for 2x the FLAs of the motor, which is 13.9 according to the motor data plate. The manual for the IR air compressor calls for 3x the FLAs. The 40 amp breaker would only be slightly less than 3x rule. Would I be safe with the 40 amp breaker? I tried out the compressor on a 30 amp breaker and it ran fine.