Okay, so we bought an air compressor that comes with its own plc, starter, etc. It has an emergency stop button on it as well as start, stop, reset. The circuit breaker the starter is fed from is in another building. Do we have to put an additional fused disconnect switch near the air compressor so that it is "in view" of it? Or is the circuit breaker (that is off an MCC) enough? NEC figure 430.1 is a little unclear to me. I take it the "stop" button on the controls of the compressor isn't considered a disconnect from the power?
Like this :
Is the middle disconnect switch and fuse required?
Like this :
Is the middle disconnect switch and fuse required?