ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
IRC M1307.3
by BigB. 08/17/18 11:52 PM
Calling all Non-US members!! (Non-US only)
by Bill Addiss. 08/13/18 05:52 PM
Upgrade the old panel
by gfretwell. 08/13/18 12:20 AM
depth of duckbank
by ghost307. 08/12/18 09:26 PM
Section 179 vehicle purchases
by BigB. 08/05/18 01:06 PM
New in the Gallery:
Plug terminals
Housebilding DIY wiring
Who's Online Now
0 registered members (), 6 guests, and 21 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Fire Alarm Violation #122011
09/09/05 07:13 PM
09/09/05 07:13 PM
Admin  Offline
OP
Administrator
Member
Joined: Oct 2000
Posts: 3,503
NY, USA
(submitted by Joe Tedesco)
Quote
Shown is a fire alarm system connected to a general purpose receptacle in an electrical room with MC cable and a plug. This installation does not meet code and is a dangerous installation for both the electrical safety and for the life safety of the building occupants.

The installation violates the National Electrical Code, NFPA 70, 2005 edition. In addition to the cable not be supporting properly, I question if the installation meets article 330.12. In this article it states that MC cable shall not be installed where subject to physical damage. This was located in an electrical/storage room, where in my opinion would be subject to physical damage. Also, the installation violates 330.40 because the plug is not listed and identified for use with MC cable.

This installation also violates NFPA 72-2002, National Fire Alarm Code. Section 4.4.1.4.1 requires that the fire alarm system shall be connected to a dedicated branch circuit. The receptacle shown was connected to other receptacles in this same room. Also, Section 4.4.1.4.2.1 requires mechanical protection for the branch circuits and connections. As you can see there is no mechanical protection for the plug/receptacle. Also the branch circuits feeding the receptacles were not protected with a handle clamp to lock the breaker in the on position.

John E. Hudacek, PE, CET
NICET Fire Alarm Systems Level II
Electrical Engineer
[Linked Image]

Tools for Electricians:
Re: Fire Alarm Violation #122012
09/10/05 11:32 AM
09/10/05 11:32 AM
P
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
Fire alarm panels here are normally hard-wired to their appropriate branch circuit.

Leaving the MC cable and specific code provisions aside, if this were going to be plug-and-receptacle connected I would have thought that a receptacle mounted right next to the panel would be the best approach.


Featured:

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

 

Member Spotlight
HotLine1
HotLine1
Brick, NJ USA
Posts: 6,997
Joined: April 2002
Show All Member Profiles 
Top Posters(30 Days)
BigB 3
Popular Topics(Views)
248,598 Are you busy
186,329 Re: Forum
175,790 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.013s Queries: 14 (0.002s) Memory: 0.9437 MB (Peak: 1.0606 MB) Zlib enabled. Server Time: 2018-08-18 08:23:57 UTC