The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!


2017 NEC and Related
2017 NEC
Now Available!

Recent Posts
Parking lot pole light swap....
by gfretwell
10/24/16 08:46 PM
International Wire Colour Codes
by Tjia1981
10/23/16 12:08 PM
Son of Sparky
by HotLine1
10/20/16 07:43 PM
Speaking of Plugmold ...
by gfretwell
10/17/16 02:37 PM
Broken battery charger? Check for cobwebs!
by gfretwell
10/17/16 02:30 PM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 14
HotLine1 7
ghost307 7
renosteinke 6
Potseal 4
Who's Online
0 registered (), 339 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#19243 - 12/22/02 07:18 AM What classification is this location?
Edward Offline

Registered: 12/14/02
Posts: 309
Loc: California
I am working in a warehouse/production warehouse where the company makes wooden garage doors. There are many table saws,dust collectors,routers,sanders...Anotherwords it is a huge wood working shop.
What class is this location classified?
Class1,2 or 3?

Work Gear for Electricians and the Trades

Work Gear for Electricians and the Trades
Work Gear for Electricians and the Trades
Arc Flash Clothing, Gloves, KneePads, Tool Belts, Pouches, Tool Carriers, etc. etc....

#19244 - 12/22/02 05:33 PM Re: What classification is this location?
dana1028 Offline

Registered: 01/09/02
Posts: 163
Loc: San Carlos, CA
prob. class II

(1999) 500-8 Class II Locations: 'are those that are hazardous because of the presence of combustible dust....see 500-8(a) & (b) for Div. 1 & 2 conditions.... Art. 502 then gets into the wiring methods for each division.

#19245 - 12/23/02 10:34 AM Re: What classification is this location?
JBD Offline

Registered: 07/12/01
Posts: 599
Loc: WI, USA
Normal saw dust is not enough to justfy a Class II environment.

We have a door manufacturer, down the road, and nothing in the production area is "explosion-proof" rated.

However, we let the local fire department determine all of our classifications.

#19246 - 12/23/02 06:24 PM Re: What classification is this location?
Mike Wescoatt Offline

Registered: 06/17/01
Posts: 164
Loc: Cedar City, Utah
In our wood and metal shops we don't have any special requirements set by the Fire Marshall, but we take it an extra step and make everything NEMA 3 or better; no NEMA 1 enclosures. We do have dust collection and fume extraction, though.
Mike Wescoatt

#19247 - 12/24/02 06:05 PM Re: What classification is this location?
nesparky Offline

Registered: 06/21/01
Posts: 650
Loc: omaha,ne
This depends on several factors Number of air changes/minute, is the dust collected and routed away from electrical equipment, layout of the equipment, etc.
This is why we ask the fire marshal to make the determination. They usually can get the designers to do all the engineering necessary to properly make the call. The fire marshal's office usually has a big enough hammer to get this done- if they care to.


ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals