Warning Sign Requirements in Junction Boxes, located in Class I Div 2 locations

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DM2-Inc

Senior Member
Location
Houston, Texas
We have junction boxes that are installed in Class I, Div 2, Group B locations. The equipment inside of the enclosure is suitable for the locations (i.e. non-incendive).

We normally put a sign inside of the enclosure that states "DO NOT DISCONNECT WIRES, OPEN DISCONNECT-TERMINALS, OR REPLACE FUSES WITHOUT THE AREA FIRST BEING DECLASSIFIED".

I was asked if this meets the requirement of NEC. I had a look at 501 but didn't see anything. Does the NEC specify sign requirments for this?
 
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