moke system activation, signal to activte smoke system cab sent from smoke detector of water flow switch in sprinkler system i ask about case that recommended used onley water flow switch instead of detectors.
NEC 2017 680.26(B) states that conductive pool shells shall be bonded. 680.26(B)(1) states that, "Vinyl liners...shall be considered to be nonconductive materials." Some pool construction methods that utilize nonconductive vinyl liners also utilize a (unreinforced) concrete base (or shell) between native soil and the vinyl liner material. … Show more
Join NFPA Regional Education Specialist Meredith Hawes (pictured at right) and fire and life safety experts for a discussion on the 2017 Fire Prevention Week theme and how it applies to people who are deaf or hard of hearing. Meredith will be joined by Communications and Marketing Coordinator for Virginia Hands & Voices Valerie Abbott, and J.D.… Show more
Position Title: ASSISTANT FIRE MARSHAL I ASSISTANT FIRE MARSHAL II (Non-Rotational) Full Time Non-Exempt Job #: CSS 10 – 18 Full time – Open to Public Department: … Show more
I was recently at a residence where they had two separate and distinct switch boxes stacked on top of each other. The upper switch box was recently put in by another electrician and the lower switch box has been in use for a few years. Does this stacking of switches (One on top of the other spaced by approximately 1.5 inches) violate the NEC?… Show more
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Has anyone come across this in a fire investigation: LONDONDERRY — Officials say a refrigerator is the likely source of a two-alarm garage fire Tuesday evening in Londonderry. Crews arrived around 5:36 p.m. at 19 Chandler Drive to find a fully involved structure fire in a standalone garage, but the flames had not yet reached the main… Show more
Aren't most of the typical refrigerants used in consumer applications inert fluorinated and chlorinated compounds designed to be stable against polymerization? Perhaps the lubricant in the lines leaked out? This upcoming webinar might be helpful though. NFPA webinars - Evaluation of Fire Hazard of ASHRAE Class A3 Flammable Refrigerants