ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Recall notice: Southwire wi-fi wall switches
by sparkyinak. 03/15/18 06:03 PM
Goodman Manufacturing Recalls Modular Blowers
by Admin. 03/13/18 10:40 PM
MAAX Spas Recalls Hot Tubs and Swim Spas
by Admin. 03/13/18 10:29 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 16 guests, and 6 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Divisions / Zones #166245
07/16/07 04:23 PM
07/16/07 04:23 PM
okfixer  Offline OP
Junior Member
Joined: Jun 2005
Posts: 6
Sidney,Ne, USA
What are the benefits of using zone locations over the division method? In looking over what OSHA is about to implement in August, it seems you have more liabilty using zone locations. Just curious.


Arc Flash PPE Clothing, LOTO & Insulated Tools
Re: Divisions / Zones [Re: okfixer] #166246
07/16/07 04:48 PM
07/16/07 04:48 PM
renosteinke  Offline
Cat Servant
Joined: Jan 2005
Posts: 5,316
Blue Collar Country
They are simply two slightly different approaches. The biggest difference is that the 'zone' system has a category for stuff that is ALWAYS in a hazardous exposure ... such as inside a gas tank. Many things rated "Class 1 Division 1" are not intended to ALWAYS be in such an atmosphere.

The other aspect relates to enclosure ratings. Many items - controls in particular - are of European make, and are specified in terms of "zone," rather than area. As with other enclosure ratings, the European classifications are not quite exactly comparable to NEMA designations.

Hazardous location practices are something that you really have to evaluate for each job, considering the specifics of each situation, and keep in mind the 'big picture.' There are several approaches that can be taken ... not all of them electrical ... and it's not always smart to mix approaches.

I suppose it's not so much a matter of using either the 'zone' or 'area' method. I think you pretty much have to use both.


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


Member Spotlight
Alan Belson
Alan Belson
Mayenne N. France
Posts: 1,803
Joined: March 2005
Show All Member Profiles 
Top Posters(30 Days)
Trumpy 5
Admin 5
Popular Topics(Views)
244,411 Are you busy
181,526 Re: Forum
171,577 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.020s Queries: 15 (0.004s) Memory: 0.9435 MB (Peak: 1.0581 MB) Zlib enabled. Server Time: 2018-03-19 18:33:02 UTC