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#169373 - 10/03/07 07:21 AM Fire Pumps
Last Leg Offline
Member

Registered: 05/04/05
Posts: 41
Loc: Houston, Texas
EMT conduits were previously ran through a Parking Garage. We are bidding on a project at the receiving end. 150HP Pump, 1200 Amp Service Fused Disconnect, RHW wire. REF: 695.6(B)3 - does this apply? This was suggested in the meeting with the GC. I usually avoid a Service disconnect and/or have routed 'outside the building', so haven't used this method. How or where do I confirm (Iknow - AHJ, getting my ducks..)that this is a "listed" electrical circuit protective system, with a minimum 1 hour rating? I've read EMT is not rated, as it is not combustible and read the RHW rating, but can't put my finger on the exactness. Any help?

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#169377 - 10/03/07 08:16 AM Re: Fire Pumps [Re: Last Leg]
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9012
Loc: Estero,Fl,usa
I had a fire pump with conductors run about 30' into the building. We got by this by putting the raceway down in the corner between floor and wall, building a 2x8 form and pouring it solid with concrete.
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Greg Fretwell

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#169380 - 10/03/07 08:55 AM Re: Fire Pumps [Re: gfretwell]
Alan Nadon Offline
Member

Registered: 03/10/05
Posts: 398
Loc: Elkhart, IN. USA
Check out http://www.drakausa.com/lifeline Their RHH wire is listed for two hours in EMT.
_________________________
Alan--
If it was easy, anyone could do it.

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#169385 - 10/03/07 11:59 AM Re: Fire Pumps [Re: Alan Nadon]
HotLine1 Offline

Member

Registered: 04/03/02
Posts: 6786
Loc: Brick, NJ USA
Just a thought...
The RHH was $$$$$$ on a job that the EC thought would solve the dilemma.
They wound up saw cutting the floor, and going under the slab
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John

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#169451 - 10/05/07 10:01 AM Re: Fire Pumps [Re: HotLine1]
mikesh Offline
Member

Registered: 06/07/06
Posts: 614
Loc: Victoria, BC, Canada
I think that a fire pump must be fed with 2 hour rated conductors. In EMT there is a special conductor that can give a 2 hr rating otherwise I think you need several inches of concrete encasement or other 2 hour fire rated enclosure.

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#169452 - 10/05/07 10:06 AM Re: Fire Pumps [Re: mikesh]
allphase Offline
Member

Registered: 09/05/07
Posts: 14
Loc: Chicago il.
RRH is a lot of $$$$ but it will pass the 2 hour rate in emt.

Have fun pulling it its thick . We over size the emt.

Larry


Edited by allphase (10/05/07 10:07 AM)

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#169466 - 10/05/07 02:55 PM Re: Fire Pumps [Re: allphase]
Last Leg Offline
Member

Registered: 05/04/05
Posts: 41
Loc: Houston, Texas
Thanks for the input... just turned in the bid. Wish I had checked 'have fun pulling it.. it's thick' first. Pipe is oversized a bit though - 3- 250's and grnd in a 3". I did up the labor a bit, not knowing.
Thanks all.

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