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Amresh Narine
Hi where can I find the fire rating on a fire resistant breaker any kind of breaker .
in Electrical
John Tierney III
Does Article 230-3 apply to Modular Duplex dwelling, ie, can an S E Cable pass through unit 1 to reach unit 2?
in Electrical
Jeff Dugger
I'm working on an incident in an aerosol manufacturing facility. The following question has nothing to do with the incident. However while doing a quick walk through from the incident area, I noticed a bonding/grounding technique, that I believe isn't correct.   The company uses the clamps from battery jumper cables as the attachment… (Show more)
in Electrical
Dale Weis
NFPA 70E clearly defines a qualified person, what is an authorized qualified person as it relates to instructing an NFPA 70E course?
in Electrical
Daniel Pohnert
"800.2 Definitions. Communications Circuit. The circuit that extends voice, audio, video, data, interactive services, telegraph (except radio), outside wiring for fire alarm and burglar alarm from the communications utility to the customer's communications equipment up to and including terminal equipment such as a telephone, fax machine, or… (Show more)
in Electrical
john bultman
NFPA 70E  Regards to mandatory Face Shield? We have had arc flash study done at our facility with all electrical panels labelled per 2015 requirements. Most cabinets are under 1.2 cal/cm2, for instance:   .21 cal/cm2@18 " arc flash boundary is 7"   We are having a debate with one side saying you MUST PER NFPA70E have a face shield to open the… (Show more)
in Electrical
Gennadiy Begelman
To Whom It May Concerns,   I am a project manager at a final signal design unit.   Could you share any interpretation information or suggestions for the article 314.28 (Pull Box Sizing). Pull box size defined as 8 x largest conduit diameter. Does it apply to all types of pull boxes/handholes? Are there any exceptions?   The typical MnDOT approved… (Show more)
in Electrical
We recently hired a new associate that wears an insulin pump.  Part of his job duties entail working in a class 1 division 1 environment.  Currently we have kept him from those job duties. The pump, nor any information on the manufacturers website states anything about their pump being intrinsically safe.  A submitted request via their contact… (Show more)
in Electrical
I am J.H. Kim. And I am working for power plant. (Coal Fired Power Plant) Article 708 Critical Operations Power Systems (COPS) is added to the NEC in 2008 I would like to know that power plant is involved COPS or not. As I have known that COPS include police stations, fire stations, emergency management centers, emergency call centers, and… (Show more)
in Electrical
David Willey
ref: Labeling for voltage and hazards on wall mounted 120 volt equipment. Question- what are the voltage labeling and other labeling requirements for equipment such as wall mounted electric blower hand dryers (Xlerator type) and small appliances bolted to the wall. Voltage, hazard and circuit Identification. If required, how large is the required… (Show more)
in Electrical
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