ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Commercial lift stations
by triple - 06/09/24 05:23 PM
Stuff that happens after we leave
by gfretwell - 06/09/24 04:26 PM
photocell requirement for metal halide ballasts
by Wayles3 - 06/02/24 03:59 PM
Photo cell diagram for MH100w light
by Wayles3 - 06/02/24 07:32 AM
Chinese motors rated 59.9A 220 v 50hertz
by gfretwell - 05/30/24 08:48 PM
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
0 members (), 30 guests, and 24 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Joined: Jul 2004
Posts: 49
G
Member
What are some examples of a "listed electrical protective system with a 1 hr fire rating" as referred to in the NEC section referenced above. Have an existing fire pump installation (not installed correctly at this time) where the AHJ will require an outside disconnecting means. Options 1 & 2 may not be practical. The fire pump controller is located about 10 foot inside the building.

Joined: May 2004
Posts: 73
R
Member
I think they mean type MI cable. I saw it for the first time last year being used for the fire pump in a nursing home. I had to trace it to the fire pump room cuz it looked like 1/2" copper tubing with orange Brady 480 v. stickers on it. It ain't cheap.

Joined: Jul 2004
Posts: 9,940
Likes: 34
G
Member
They went with burying the raceway in concrete on a job I inspected.


Greg Fretwell

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