ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
It's been an interesting career
by Fridayrack - 12/07/21 01:30 AM
From an outsider- How does tipping work?
by gfretwell - 12/06/21 06:37 PM
Photo Editing Software?
by Fridayrack - 12/03/21 05:05 AM
Square D "All-In-One" Panelboard
by NORCAL - 11/30/21 12:48 PM
Where is Everyone?
by luckyshadow - 11/21/21 10:14 AM
New in the Gallery:
240/208 to a house
240/208 to a house
by wa2ise, October 9
Now you know.
Now you know.
by Tom_Horne, September 7
Who's Online Now
0 members (), 15 guests, and 14 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Page 1 of 2 1 2
#188381 08/04/09 01:57 PM
Joined: Mar 2005
Posts: 399
A
Member
We had a recent fire in a sprinkled warehouse that caused a problem. A seperate fire pump building was located 100 feet from the warehouse building.
The utility supply went to a transformer bank with utility cut outs. Then it split with one drop to the fire pump building the other drop to the warehouse. Both services were located inside.
The fire in the building got above the sprinklers. The fire was near the service equipment in the building. Because they couldn't get to the service the only other place to shut off the power to the building was at the transformer. If they do that it drops out the fire pump.
For years I have inspected installations where the building and the fire pumps are from the same transformer bank. They comply with the Code. But..............
I never thought about it but that is where the utiltiy usualy cuts power during a fire. Seems like a waste to seperate everything when it all comes from the same transforemers.
I don't see a solution, just a heads up that that sprinkler might not help that much after all.


Alan--
If it was easy, anyone could do it.
Joined: Jan 2005
Posts: 5,316
Cat Servant
Member
Give Murphy credit for this one ...

Look, we can only do our best, and try to address the most expected risks. You can't make anything proof against every eventuality.

With the fire out of reach of the sprinklers .... I wonder if there was a fault with the sprinkler design .... I have to ask what good then pumps would accomplish even if they had continued to operate.

Last edited by renosteinke; 08/04/09 03:45 PM.
Joined: Aug 2007
Posts: 853
L
Member
I'm with 'Reno. Faulty install. Those should all be up heads for this very reason.
If it (fire) gets ahead... The pump don't matter. so....

As with every dilemma,it will 'come out in the wash'.
Sounds like a good day to have insurance!

Joined: Feb 2003
Posts: 939
F
Member
That one reason why some area are shying away from electric fire pumps they are going with either diesel or steam turbine fire pumps to advoid that issue.

Merci,Marc


Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)

Joined: Apr 2002
Posts: 7,283
Likes: 3
Member
Sounds like a 'bad' sprinkler design. Was the building 'modified' after the original install?



John
Joined: Mar 2004
Posts: 251
W
Member
Many times the fire loading exceeds the sprinkler design. The K Mart warehouse burned to the ground several years ago because of this. Buildings need to be inspected after they are filled by a fire protection engineer to see if additional protection is needed. Sometimes sprinklers need to be installed on the shelving. A pallet of camping fuel or lots of sawdust (pressboard) furniture can quickly overtake a standard sprinkler system.

Joined: Mar 2005
Posts: 399
A
Member
The fire started in a motor home. The wood paneling and L.P. gas inside finally blew out of the home when the windows went. The fiberglass outer shell kept the sprinklers from reaching the fire. Once it was outside the vehicle it went clear to the roof, above the sprinklers.
WestUP.S. My oldest brother had just been put in charge of construction / buildings for K-mart (East coast) when they lost that warehouse. He said that the steel sprinkler pipes were melting while still discharging water.


Alan--
If it was easy, anyone could do it.
Joined: May 2005
Posts: 167
B
Member
Originally Posted by WESTUPLACE
Many times the fire loading exceeds the sprinkler design. The K Mart warehouse burned to the ground several years ago because of this.


I didn't remember reading about this anywhere, so I did a little Google research and found out why: It happened in 1982. A little more than several years ago, but anyway, here's the NFPA report:

http://www.nfpa.org/assets/files//MbrSecurePDF/FIFallsTownship.pdf

Joined: May 2002
Posts: 30
A
Member
As a utility Meterman, I have voiced my opinion against feeding the fire pumps from the same transformer feeding the building. I have been told, that this is code compliant & per spec, but that does not make it right. (One customer told me he was only installing the fire pump for the insurance discount, because his building would never have a fire...)

I know if we respond to a building fire, the first thing we do is pull the cutouts to deenergize the building. This is required by the local Fire depts, to eliminate the risk of a Firefighter being electrocuted.

The best fire pump install is a free standing building fed from a different transformer, we have a few of these in our area. They are more expensive to install, but it is the best way to go.

Joined: May 2005
Posts: 167
B
Member
Indeed, one of the issues outlined in the NFPA report I linked to is that the booster fire pump was wired after the switchgear, so it lost power when power was cut to the building.

Page 1 of 2 1 2

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
SafetyWired
SafetyWired
Pa, USA
Posts: 44
Joined: July 2013
Top Posters(30 Days)
NORCAL 1
Popular Topics(Views)
286,628 Are you busy
219,101 Re: Forum
205,193 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5