Generator disconnect

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Generator disconnect

#78833 10/27/01 10:31 PM

Joined: Jul 2001

Posts: 6

Bryn Mawr, Pa. U.S.A.

L

lousen

OP

Junior Member

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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Re: Generator disconnect

#78834 10/28/01 07:20 AM

Joined: Oct 2000

Posts: 5,393

S

sparky

Member

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
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Re: Generator disconnect

#78835 10/28/01 12:11 PM

Joined: Aug 2001

Posts: 599

Riverside, CA

N

Nick

Member

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.

Re: Generator disconnect

#78836 10/28/01 07:33 PM

Joined: Oct 2000

Posts: 5,393

S

sparky

Member

Lousen,
can you give us more info here? what is the genny used for? etc..
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Re: Generator disconnect

#78837 10/28/01 11:03 PM

Joined: Jul 2001

Posts: 6

Bryn Mawr, Pa. U.S.A.

L

lousen

OP

Junior Member

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.