ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Video: Inventor of the GFCI self-testing shocks
by Bill Addiss. 01/17/18 11:11 PM
FPE in Germany
by HotLine1. 01/17/18 07:07 PM
VDE 0100 to introduce AFCIs
by LongRunner. 01/17/18 10:32 AM
Fujifilm Recalls Power Adapter Wall Plugs
by Admin. 01/16/18 07:04 PM
Air Compressor feeder conductor sizing
by Potseal. 01/15/18 09:08 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
1 registered members (LongRunner), 10 guests, and 15 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Explosive Atmospheres #149951
06/07/04 10:06 AM
06/07/04 10:06 AM
Trumpy  Offline
OP
Member
Joined: Jul 2002
Posts: 8,231
SI,New Zealand
Is there an equivalent Standard in the US for the application of an Explosive Atmosphere.
Installations that spring to mind are:
Gas Stations, Spray Paint Booths, LPG Filling Stations.
Here NZS 2380.1 covers most things, but they are called Hazardous Areas here.
We have EX ratings on all HA gear.
How is gear rated in the US?. [Linked Image]

Arc Flash PPE Clothing, LOTO & Insulated Tools
Re: Explosive Atmospheres #149952
06/08/04 11:17 PM
06/08/04 11:17 PM
D
DougW  Offline
Member
Joined: Jun 2003
Posts: 1,143
North Chicago, IL
Basically, the NEC divides Hazardous Atmospheres into the following (courtesy of the gelightingsystems.com website, since I don't have my Code book handy):

Quote
CLASS I locations are those in which flammable Gases or Vapors are ormay be present in the air in quantities sufficient to produce explosive orignitable mixtures.

CLASS II locations are those that are hazardous because of the presence of Combustible Dust.

CLASS III locations are those that are hazardous because of the presence of easily ignitable Fibers or Filings, but in which such fibers or filings are not likely to be in suspension in the air in quantities sufficient to produce ignitable mixtures

Each “CLASS” is further defined as either Division 1 or Division 2.

DIVISION 1 is an environment that is "Normally Hazardous".

DIVISION 2 is an environment that is "Not Normally Hazardous".

Re: Explosive Atmospheres #149953
06/14/04 04:45 PM
06/14/04 04:45 PM
N
nesparky  Offline
Member
Joined: Jun 2001
Posts: 642
omaha,ne
Mike
if you have a NEC book look in chapter 5 Hazardous locations. read carefully, it can be confusing and is something of a specalized area. I have seen and heard a lot of sometimes heated discussion about what is needed and where especally when some one is trying to save money. The equipment for hazardous areas can be very very expensive.


ed
Re: Explosive Atmospheres #149954
06/18/04 05:32 AM
06/18/04 05:32 AM
Trumpy  Offline
OP
Member
Joined: Jul 2002
Posts: 8,231
SI,New Zealand
Ed, Doug,
Thanks for your responses.
Hazardous Area work is something that I try to keep right away from.
I have repaired the odd pump in the Fuel pumps here and that was as close as I wanted to get to that kind of thing.
I am the Maintenance Electrician, at a local Flour Mill and we have been changing over the last few years, all of the motors to Non-Sparking types (ExN), some of them were Slip-ring types for speed control, but Micro-drives put that fire out!.
Last guy didn't have a clue!. [Linked Image]

Re: Explosive Atmospheres #149955
06/18/04 11:28 PM
06/18/04 11:28 PM
N
nesparky  Offline
Member
Joined: Jun 2001
Posts: 642
omaha,ne
Mike
If you look in the NEC that area would fall into the class 2 chapters. I have done enough grain,and dusty area to get my fill of these areas. You need a lot of care to keep the dust out of the equipment. Good explosion proof equipment is expensive but where needed will save lives and property.
Unfourtunatly I have seen the result of grain and suger dust explosions, no different for TNT for results. Some of those were fatals to employees.
Take care and be safe.


ed

Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
Tom
Tom
Shinnston, WV USA
Posts: 1,044
Joined: January 2001
Show All Member Profiles 
Top Posters(30 Days)
sparky 20
Admin 20
Potseal 13
Popular Topics(Views)
243,537 Are you busy
180,340 Re: Forum
170,827 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.018s Queries: 14 (0.004s) Memory: 0.9684 MB (Peak: 1.1094 MB) Zlib enabled. Server Time: 2018-01-18 11:56:43 UTC