ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
240V only in a home and NEC?
by emolatur - 05/18/24 06:12 PM
Electricians revenge
by gfretwell - 05/09/24 08:24 PM
Safety at heights?
by gfretwell - 04/23/24 03:03 PM
Old low volt E10 sockets - supplier or alternative
by gfretwell - 04/21/24 11:20 AM
New in the Gallery:
This is a new one
This is a new one
by timmp, September 24
Few pics I found
Few pics I found
by timmp, August 15
Who's Online Now
1 members (Scott35), 32 guests, and 10 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#38092 05/14/04 08:11 PM
Joined: Feb 2004
Posts: 17
S
Member
A guy was talking about some lonwork transformer being above the t-grid having to be plenum rated.

I thought a plenum was a duct or airway. What kinds of things have to be plenum rated and is above the t grid in an office a plenum?

I also remember a guy talking about have tie wraps used above the t grid had to be plenum rated. I'm not familar with this.

#38093 05/14/04 08:47 PM
Joined: Aug 2003
Posts: 1,374
R
Moderator
Basically, everything has to be plenum rated if its in a plenum ceiling. [Linked Image]


Ryan Jackson,
Salt Lake City
#38094 05/14/04 08:50 PM
Joined: Nov 2000
Posts: 2,148
R
Member
Look at 300.22(C).
Don


Don(resqcapt19)
#38095 05/14/04 09:02 PM
Joined: May 2004
Posts: 8
P
Junior Member

#38096 05/14/04 09:03 PM
Joined: Dec 2001
Posts: 300
M
Member
Sometimes the space above a drop ceiling is used as the return air plenum. If so, everything in the ceiling has to be plenum rated. Sometimes the space below a floor or in a wall can be used this way too.


Link Copied to Clipboard
Powered by UBB.threads™ PHP Forum Software 7.7.5