control identification

[Lewellyn]

I'm trying to find the NEC requirements for identifying controls. Specifically I am trying to find the code that would give direction for labeling controls that are located remote to the equipment that they operate.

 

[iwire]

Almost none in the NEC, perhaps NFPA 79 would have some direction.

 

[Lewellyn]

Thanks. Thought I was just overlooking something obvious. I did find in the 2012 IFC (605.3.1) labelng requirements for panels but not controls...

 

[tom baker]

Or UL 508A. There may be some IEC or ISA standard that addresses this issue.

 

[pfalcon]

The NEC does not cover issues specific to industrial machinery. NFPA79 covers those issues. OSHA requires that you identify which electrical standard you're using but does not dictate as long as it's a strong standard. Lacking a choice they'll use their best knowledge, which turns out to be the NFPA79, as a basis for judgement.

Marking and labeling of industrial controls is required, but most of the actual content is advisory such as seen in Annex D and Annex E. They aren't a mandatory part of the standard but provide an example of the level of documentation, marking, and labeling expected. The NFPA79 is much cheaper and easier to read :happyyes: than the NEC.