NEC question - Does a hardwired 120 VAC machine need a local LO Device?

[theColonel26]

Does a hardwired 120 VAC machine need a local disconnect and lock out device? I was always under the impression that it did, but a plant controls engineer at a install I was on told me it didn't.

I was thinking that if it had a plug it did not, but hardwired yes.

Thoughts? References?

NEC Mostly but Also interested in UL as well.

 

[_Dock_]

NFPA 79 states that each “power supply circuit”, (does not specify voltage) have a disconnect within the enclosure or directly adjacent. Unless supplied by plug and socket, so my interpretation is yes you need a disconnect.

 

[Ken Moore]

Not sure about machines, but I do there is an exception for motors.
See NEC 430.102(B)

 

[_Dock_]

Chapter 5 in NFPA 79 outlines disconnecting means.

 

[ndzied1]

Required by UL508A in the Industrial Machinery section.