ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Happy Father's Day!
by Bill Addiss - 06/19/21 04:16 PM
A Risky Setup
by timmp - 06/18/21 08:08 PM
Where is Everyone?
by gfretwell - 06/18/21 11:07 AM
Conduit over Vinyl Siding
by Jim M - 06/16/21 08:30 PM
Updated Forum Software
by Admin - 06/15/21 10:23 AM
New in the Gallery:
2020 - 2021 Winter Project
2020 - 2021 Winter Project
by Bill Addiss, April 29
Garden 2021
Garden 2021
by Bill Addiss, April 26
Who's Online Now
0 members (), 3 guests, and 15 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Page 1 of 3 1 2 3
Joined: Oct 2000
Posts: 2,749
Member
This is a hazardous (classified) location.

Why?

What rules are required to be followed?

[Linked Image]


Joe Tedesco, NEC Consultant
2017 / 2014 NEC & Related Books and Study Guides
Joined: Oct 2003
Posts: 147
C
Member
North of the border, this would be considered a "Category 2" location as it appears liquids and corrosion are present. Is the N.E.C. similar in defining this area.

Joined: Oct 2003
Posts: 259
J
Member
Whats the location ?

Joined: Apr 2002
Posts: 2,527
B
Moderator
Wow, that looks like an agonizing quandary, for likely corrosives and flammable vapors are anticipated. I’m not up on the latest in enclosure innovations from Appleton or Crouse-Hinds, but it looks like “combination” NEMA type 6 or 6P and 7 enclosures [99NEC Table 430-91] would be needed.

There is another wrench-in-the-gears here. In typical situations for this type of equipment, it would seem to be insanity not to use some sort of anti-seize compound on ALL threaded surfaces. Is there anything listed for such an application that will preserve explosion-proof integrity?




[This message has been edited by Bjarney (edited 11-16-2003).]

Joined: Oct 2003
Posts: 147
C
Member
Other than the electrical equipment being explosion proof, is there something else in the picture that indicates flamable vapors? I don't have a very good monitor and some details are not clear.

Joined: Jan 2003
Posts: 4,391
I
Moderator
I am not very good with hazardous location work but the fact it is a pit has some influence I believe.

Bjarney
Quote
it would seem to be insanity not to use some sort of anti-seize compound on ALL threaded surfaces.

But why? all that stuff will unthread easily. [Linked Image]


Bob Badger
Construction & Maintenance Electrician
Massachusetts
Joined: Nov 2002
Posts: 790
W
Member
All those wires dangling out of that box on the right looks like a bad idea here :-(

Joined: Apr 2002
Posts: 2,527
B
Moderator
iwire — No personal offense intended, but I disagree with you on this. I'll bet rusted threads would make disassembly of pipe and cover threads very difficult.

Joined: Jan 2003
Posts: 4,391
I
Moderator
I was only clowning around, I would think all those smallish cover screws would break before coming loose.

And the large diameter fine threaded J box covers would be just plain imposable to remove with out the "red" wrench. (heat) [Linked Image]


Bob Badger
Construction & Maintenance Electrician
Massachusetts
Joined: Apr 2002
Posts: 2,527
B
Moderator
Sorry iwire — I missed the smiley face in your post.

In some plants, anti-seize goo {like “Never-Seize” or “Fel-Pro C5A”} is a means of survival if anything threaded needs survive corrosion, but for explosion-proof fittings is not compatible with the ignition "venting process" as I understand it.

Page 1 of 3 1 2 3

Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
CDS
CDS
Nicholson Ga
Posts: 34
Joined: June 2006
Top Posters(30 Days)
Trumpy 10
Admin 10
Popular Topics(Views)
280,437 Are you busy
213,517 Re: Forum
200,399 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5