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Leonel Antonio garay
I work in a 34.5 Kv plant. We must to calculate the incident energy but we don´t know what is the most appropriate method. Some people have told me about the "IEEE 1584: Guide for performing arc flash calculations" but this guide calculate for 208 v to 15 Kv.    Help please,
in Electrical
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James Stiles
Is there a resource for determining what group a combustible material belongs to if it is not listed in NFPA 497, Table 4.4.2.  In this instance: 4-Ethyltoluene 1,2,4-Trimethylbenzene 1,3,5-Trimethylbenzene
in Electrical
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Gregory Harrington
I'm excited to be presenting a free webinar on Thursday, September 28 at 1 p.m. ET, which will provide an overview of the key changes in the 2018 edition of NFPA 101, Life Safety Code. This will be a great opportunity to learn about new provisions as jurisdictions update their adoptions to this latest edition. Some of the new provisions I'll be… (Show more)
in NFPA Today
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Normand Racine
Is it possible to install a remote-controlled electric main valve for emergency closing in the event of a pipe breakage. This valve will be activated from a security control room located in the same building by a preventive agent trained for this action.
in Fire Protection Systems
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lance schexnaydre
I work in a chemical facility and was recently informed that in order for production technicians to operate 480V breakers with the covers secured this would require 25cal arc flash PPE.  I have not been able to confirm this level of PPE requirement.
in Electrical
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Richard Nason
Code edition evolved is Life Safety101, 2009. I have an existing building, non- sprinkled and not fire alarmed, that has multiple business occupancies, no other occupancies involved. It is 2 stories in height and is a Type V (000) construction type. The building’s main entrance has a foyer with a stair located in the center of the building. On… (Show more)
in Building & Life Safety
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Cathy Longley
  During the session Promoting A Culture Of Safety And Fitness To Prevent Cancer, Heart Disease, and Injuries in Boston Firefighters at NFPA’s Conference & Expo (C&E), Dr. Michael Hamrock, a former firefighter and medical director for the Boston Fire Department (BFD), made an impressive case for prioritizing firefighter health and safety.     A… (Show more)
in NFPA Today
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Olga Caledonia
What started as a regular business day in Mexico City, enjoying breakfast with colleagues and gearing up for meetings, was soon followed (to my surprise) by an annual safety drill as the country remembered the devastating September 19, 1985 earthquake that killed approximately 9,500.    I was fortunate to be part of yesterday's disaster… (Show more)
in NFPA Today