I see this set up all the time… a business declares a space a Confined Space (NOT a Permit-Required Confined Space), just a simple space that meets the definition of a CS; however, it does not have a hazard that would make the CS a PRCS. So the question is…
Does a “DANGER” sign belong on a Confined Space?
For example, there is a very distinct difference between these two signs:

Let’s first look at an often overlooked OSHA standard on “safety signs” (1910.145): (emphasis by me)
1910.145(c)(1) Danger signs.
1910.145(c)(1)(i) There shall be no variation in the type of design of signs posted to warn of specific dangers and radiation hazards.
1910.145(c)(1)(ii) All employees shall be instructed that danger signs indicate IMMEDIATE DANGER and that special precautions are necessary.
So YES, a PRCS must have a DANGER SIGN; however, a CS that does NOT rise to the level of a PRCS, should NOT have a DANGER sign. These spaces, if labeled, should have a CAUTION sign as a CS does not represent an IMMEDIATE DANGER (or it would be called a PRCS).
1910.145(c)(2) Caution signs.
1910.145(c)(2)(i) Caution signs shall be used only to warn against potential hazards or to caution against unsafe practices.
1910.145(c)(2)(ii) All employees shall be instructed that caution signs indicate a possible hazard against which proper precaution should be taken.
I believe in labeling CSs, although OSHA does not require this. But I have seen a CS become a PRCS simply by the work taking place within it. But I always labeled these CSs with CAUTION Signs, NOT DANGER signs.
What is your practice for labeling CSs and PRCSs? Does your facility use the same DANGER sign on both types of spaces?
