Hello, I have been looking for a clear definition of a cemented joint for a while and I cannot seem to find a simple paragraph explaining what it is...
Hi, I'm an electrical engineering student working on a project to prepare the hazardous area classification for a jetty over the ocean which is...
Is there a particular type of conductor that must be used in a Class 1 Division 2 hazardous location? Can I use THHN or XHHW? I'm looking at 2011...
I have encountered one of these "we always do it that way" situations. E/C has wired many stations, but has a situation which I think is a...
Is there anything in the code(s) that state you are required to have a certificate or be certified to determine an areas electrical classification?...
Does a Class 1 Div 1 explosion proof cover exist for CAT5E port? generally i would install an exposion proof GUA fitting, leave about 10' of wire...
I have multiple enclosures in series with one purge unit in a class 1 division 1 area. My question is this, can I connect the enclosures to each...
NFPA 517 classifies any area or groups of areas with an opening like a doorway at slab in the repair bay as hazardous. NFPA 30A does not seem to...
Working on a new piece of equipment that will go into a Class II Division 1 Group EFG Hazardous Location. The previous non-HL unit that this new one...
I was recently asked to finalize an electrical design at a power generation facility. The client wishes to have remote/emergency control of a...
Hi, I'm new to this forum, but looking at some of the posts folks seem very knowledgeable here. I am overseeing the installation of a coating...
I have run across an installation at a wheat grain elevator where Tray cable TC has been used for the Watch Dog Monitoring System wiring method. I...
I was looking for something the other day that I was unable to find. I seem to recall there is a requirement that an EGC of the wire type be run...
Are there special requirement for blind plugs used to fill unused cable entries of explosion proof equipment, vs. the blind plugs used in threaded...
I have a question that relates to installing security/voice/data/video in the area above a class 1 area. I my case its a major repair garage. Art...
I have a 30amp explosion proof disconnect (enclosure) for my class1 division 2 HVAC equipment. The HVAC equipment has a sealed off explosion proof...
Hello from the New Guy I am looking for some info on your NEC Article 514 Part of my project involves running a supply pipe from a Diesel fuel...
Hi, I am looking for a way to house/enclose a wireless router in an environment that needs a Class 1, Division 2 rating. Assuming heat is not an...
I have been convinced that you can install a transformer (dry type) in a class 1 div 2 location but if you are coming out of a 480v panel into and...
What actually defines the limits of a classified location? Are self closing casketed doors required to separate classified form nonclassified?...
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