ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Recent Posts
Casino Wiring methods
by HotLine1. 12/09/17 10:44 AM
Ground wire Size to water Line.
by HotLine1. 12/05/17 12:11 PM
Flexible conduit to an outside Spa
by gfretwell. 12/05/17 12:28 AM
2017 NEC Changes
by luckyshadow. 12/04/17 06:08 PM
Dimmable LED 2x4 lay in fixtures
by Vulsion. 11/30/17 06:37 PM
New in the Gallery:
Gallery Test
Popular Topics(Views)
242,991 Are you busy
179,383 Re: Forum
170,351 Need opinion
Who's Online Now
0 registered members (), 15 guests, and 10 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#122011 - 09/09/05 06:13 PM Fire Alarm Violation  
Admin  Offline

Administrator
Member
Joined: Oct 2000
Posts: 3,460
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:

#122012 - 09/10/05 10:32 AM Re: Fire Alarm Violation  
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.



Member Spotlight
Posts: 362
Joined: April 2003
Show All Member Profiles 
Featured:

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

 

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.009s Queries: 14 (0.002s) Memory: 0.7454 MB (Peak: 0.8623 MB) Zlib enabled. Server Time: 2017-12-11 05:44:09 UTC