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#78833 - 10/27/01 10:31 PM Generator disconnect  
lousen  Offline
Junior Member
Joined: Jul 2001
Posts: 6
Bryn Mawr, Pa. U.S.A.
Does generator supply entering bldg. underground require a disconnect in bldg? Gen. is 80 feet from bldg.Gen. load 200kva at 208v.


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#78834 - 10/28/01 07:20 AM Re: Generator disconnect  
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,303
Hi lousen!~
good Q
445.18 requires a disco for a genny, but does not specify where...
225-32, general rule , requires a disco. ex#1 could be applied.
If i'm reading this right (part 2 of 225) it matters if the genny serves the outbuilding or not.
others may clarify this better than I
[Linked Image]


#78835 - 10/28/01 12:11 PM Re: Generator disconnect  
Nick  Offline
Member
Joined: Aug 2001
Posts: 599
Riverside, CA
As a general rule yes. See 225-31. As Sparky stated Ex #1 in 225-32 could be applied but this would have to be acceptable to the AHJ. I don’t believe many would be inclined to accept this.


#78836 - 10/28/01 07:33 PM Re: Generator disconnect  
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,303
Lousen,
can you give us more info here? what is the genny used for? etc..
[Linked Image]


#78837 - 10/28/01 11:03 PM Re: Generator disconnect  
lousen  Offline
Junior Member
Joined: Jul 2001
Posts: 6
Bryn Mawr, Pa. U.S.A.
Gen.set mentioned before supplys single owner nursing home.If I open main service disconnect in basement in a fire emergency, Gen. set kicks in.which means power is back on. Nearest disconnect is at Gen. set-80 feet away.This installation is completed but not inspected.


#78838 - 10/29/01 07:40 AM Re: Generator disconnect  
Geno  Offline
Member
Joined: Aug 2001
Posts: 16
Syracuse, NY USA
The answer is yes you do need a disconnect within sight. Check out 700.12(B)(6) in the 2002 NEC.



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