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Dylan Fogle
What is the proper PPE for Meg testing some 2000v rated 600kcmil AL wire?  My client is requesting that we wear FR clothing to meg test some feeder wires.  I thought FR clothing was only required when there is a potential for an arc flash burn.  I don't see the potential for an arc flash, when preforming an insulation test since it is all voltage… (Show more)
in Electrical
Donald Hallford
I often see 'ball and socket type swivel covers for 4sq boxes' installed and supporting a variety of enclosures with long conduits or cords between. (I'm referring to usage other than lighting.) The exception to 314.23(F) says one rigid pipe can support a box with a threaded hub. But, the main body of 314.23(F) speaks of support within 18in of the… (Show more)
in Electrical
Gurdeep Singh
If there is a complex of buildings not attached to each other, does each building need a fire alarm panel. Will it be sufficient to have just one control panel for 3-4 buildings. Will each building be required to be alarmed separately in case of fire.
in Building & Life Safety
Kim Loehr
NFPA codes and standards are designed to ensure the safety of products, activities or processes. When it comes to lightning protection systems (LPS), the difference between “safe and effective” and “unsafe and ineffective” lightning protection is ultimately related to which guidelines are implemented.   Over the years, the Lightning Protection… (Show more)
Kim Loehr
NFPA codes and standards are designed to ensure the safety of products, activities or processes. When it comes to lightning protection systems (LPS), the difference between “safe and effective” and “unsafe and ineffective” lightning protection is ultimately related to which guidelines are implemented.   Over the years, the Lightning Protection… (Show more)
Stephen Welsh
I have a contractor that installed a 13R system in an !-4 Daycare and he used the small room rule in several room.  I can not find any reference to the small room rule in 13R, just 13.
in Fire Protection Systems
Brian Alkire
Does VoIP technology meet the standard of NFPA 72 under MFVN? Specifically does VoIP meet the required unchanged format and does all on site equipment (modems, routers, etc.) require 24 hours of secondary power as required for the fire alarm system itself?
in Building & Life Safety
Chuck Dooley
Over 5 years ago I became responsible for my church's buildings.  That included insuring that our building's fire suppression equipment was in compliance with code.  The fire inspector in Pickens, SC, briefed me on the inspection requirements.  Our church building used to be a restaurant.  It's kitchen was equipped with a halon type hooded… (Show more)
in Fire Protection Systems
Alva Good
Is it a safe or an unsafe practice to use a fire alarm pull station to help evacuate a building where there has been a report of a natural or other flammable vapors?  Are these type of electrical devices safe to activate in an area where a leakage of natural gas has been determined?
in Building & Life Safety
Terry McKinney
I need to clarify description. Openings have a minimum lintel depth of 8" from ceiling and the total width of the openings in each wall not to exceed 8'. I understand this to consider a 12" deep x 12" thick lintel over a 12' opening will combine two rooms into one compartment because even though it exceeds the minimum lintel depth, it is over… (Show more)
in Xchange FAQ
Diana Jones
NFPA is looking into developing a "digital tool" to help Engineers, Designers, and Installers answer water-related fire suppression system questions. We welcome your input! Take this brief survey that will help us create the right tool for you. Thank you!   https://www.research.net/r/2B7CH2Z  
in Fire Protection Systems
Matt Hook
In the 2012 70E 130.7(C)(15)(a) the table listed work for Other equipment 1 kV through 38 kV. The 2015 70E lowered that range to 1 kV through 15 kV. Where do I go to find Arc Flash PPE & Arc flash boundaries for tasks OVER 15 kV? There is no mention of where to find that information now. I have searched several different forums and haven't found… (Show more)
in Electrical
Xiaomin Feng
Our company building a power plant in Saudi Arabia region, there is a HFO tanks storage area, there are two 5000 m3 HFO tanks, a single tank diameter is24m, height of tanks is 12.5 m, fire dike length 80m, width 40m, center distance between two tanks is 40m. We want to calculate the foam need for fire extinguishing system. I am puzzled with foam… (Show more)
in Fire Protection Systems
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