Main Building Feeder

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Grouch1980

Grouch1980

Senior Member
Location
New York, NY
Hi all,
We're looking at possibly re-routing 4 sets of conduit and wire (from a 1200 amp switch). The 4 sets feed a commercial building... they punch into the building underground (the 1200 amp switch is outside the building in another structure) and continue for about 200 feet inside the building until they go into the switchboard serving the building. On the ground floor of the building, in the area where the conduits are underground, there will be a new large pool installed. We're looking at either re-routing the conduits around the pool (keeping them underground), or routing the conduits overhead tight to the ceiling (above the pool). The new conduits will be rigid metal conduit. Is there any concern with corrosion if we go overhead? I know it's RGS conduit, but where i worry is that the feeder serves a whole building, and am not sure if it should be exposed to a pool environment. There is a dehumidifier for the pool. Not sure if my concern is valid, looking for feedback.

Thanks!
 
I would not be all that worried about corrosion. You can always paint them, which is something that they will probably want to do for aesthetic reasons anyway.
 
Must meet 680.9(A). Even then I would look for any alternative as opposed to wiring service conductors over a pool.
 
Correct, this is a feeder, not a service. I'm still on the 2008 NEC... that section (680.8(A) in the 2008) mentions "with respect to service drop conductors and open overhead wiring, swimming pool and similar installations shall comply with the minimum clearances given in Table 680.8... etc etc". In my application, these feeders are neither service drop conductors, nor is it open overhead wiring since i am enclosed in RMC conduit. So it looks as if this is ok to do, routing above the pool, and there are no height restrictions. We will be routing tight to the ceiling slab anyway.
 
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