megloff11x
Senior Member
I'd asked before and the replies indicated that one should start with a NEMA 4 box, blow air through it, and add a listed differential pressure switch, wiring the alarm per NFPA 496.
Has anything changed with the 2005 code?
Does anyone sell a listed enclosure (or line of them) specifically for purged and pressurized applications?
Matt
Has anything changed with the 2005 code?
Does anyone sell a listed enclosure (or line of them) specifically for purged and pressurized applications?
Matt