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#169373 10/03/07 09:21 AM
Joined: May 2005
Posts: 41
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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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Last Leg #169377 10/03/07 10:16 AM
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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.


Greg Fretwell
gfretwell #169380 10/03/07 10:55 AM
Joined: Mar 2005
Posts: 399
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Check out www.drakausa.com/lifeline Their RHH wire is listed for two hours in EMT.


Alan--
If it was easy, anyone could do it.
Alan Nadon #169385 10/03/07 01:59 PM
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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


John
HotLine1 #169451 10/05/07 12:01 PM
Joined: Jun 2006
Posts: 613
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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.

mikesh #169452 10/05/07 12:06 PM
Joined: Sep 2007
Posts: 14
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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

Last edited by allphase; 10/05/07 12:07 PM.
allphase #169466 10/05/07 04:55 PM
Joined: May 2005
Posts: 41
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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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