These devices are open-type devices that are to be installed in an
enclosure only accessible with the use of a tool, suitable for the
environment.
“This equipment is suitable for use in Class I, Division 2, Groups A, B,
C, and D or non-hazardous locations only.”
“WARNING - EXPLOSION HAZARD – Do not disconnect equipment unless power
has been removed or the area is known to be non-hazardous.”
“WARNING - EXPLOSION HAZARD – Substitution of any components may impair
suitability for Class I, Division 2.”