alan232
Member
- Location
- Louisville, KY
NFPA 497A indicates that an area that is separated from a Class 1 Div 1 area by a "pierced wall" will have a Class 1 Div 2 rating up to a certain point. It also indicates that if it were separated by an "unpierced wall", the area would be general purpose. I have a compressor room that will have a 2" air line running through a firewall into a Class 1 Div 1 area. Since it is a firewall, it will have fire-stop installed around the line where it penetrates the wall. Is there anything that says that, since the penetration is sealed and there is no open hole between the two areas, that the compressor room can remain general purpose, or does it have to be Class 1 Div 2? Thank you!