Code Enforcement

I'm not familiar with a specific door rating requirement for all electrical rooms, but I'd start in NFPA 70 just to make sure the National Electric Code doesn't specify this?   If not, NFPA 101, the Life Safety Code section 8.7 covers Special Hazards, and one might consider some electrical rooms to have a degree of hazard greater than that normal…

For your situation of a single row of approximately 1000-gallon containers placed end to end, three feet of separation between each tank is the minimum requirement.   Richard Fredenburg

Milt, Thank you for your reply and relevant NFPA Section quotes. This does indeed seem to clarify the situation, unequivocally. While I am pretty sure the Third Party Certifier would have caught this at inspection time, this project is only in the design stages, and has not officially crossed their desk.  I hate being blindsided by an "uh oh",…

TABLE 310.15(B)(21) 500kcmil =812A is for Covered (Insulated) single Conductor.  This question pertains to a Multi-Conductor Cable.   Newfound info expanding on Table 400.5(A)(1).  Annex B:  Table B.310.15(B)(2)(1).   Ampacities for THHN within an overall covering (Multiconductor Cable), in Raceway in Free Air:  500kcmil = 427A.   … in Raceway…

If a double hung window has the ability to remove both the upper and lower sashes from the inside, does removing both sashes meet the clear opening requirement for escape windows, or does just the lower sash being opened have to meet the requirement?   During my Life Safety Code surveys, I would measure clear opening the lower sash in its full…

James:   I agree the room with the chamber should not a gas fireplace as an ignition source. I would also be concerned about the oxygen cylinder storage and supply manifold in the same room. Its not good practice in NFPA 99. Makes me cringe that physician's can feel they are exempt from commonly practice fire safety standards. I have made…