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#167486 - 08/13/07 05:54 PM 445.18 Disconnect at Generator location & type
Yoopersup Offline
Member

Registered: 03/04/03
Posts: 826
Loc: Michigan
445.18 requires a disconnect at the Generator location. I read this to be a Fused or Breaker type . 240.21 Conductors must be protected at the point where they receive there supply. I feel the disconnect also should be close to the generator location. .other Opnions please??

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#167490 - 08/13/07 07:30 PM Re: 445.18 Disconnect at Generator location & type [Re: Yoopersup]
wire_twister Offline
Member

Registered: 07/25/07
Posts: 265
Loc: Georgia USA
We sometimes put in generators for cell phone equipment, most are Generac sets. These have breakers on the gen-set where the conductors hook to the set, not what I consider accesseble though, they are inside the gen-set cabinet which is usualy locked.
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#167575 - 08/15/07 04:23 PM Re: 445.18 Disconnect at Generator location & type [Re: wire_twister]
sparkyinak Offline
Member

Registered: 07/08/07
Posts: 1286
Loc: Alaska
Be cafeful Jimmy by using the breaker that comes with the equipment. It may be considers as supplemental OCP thus does not meet protection requirements. It should state in the lititerture that come with the genset. I am not familar with Generac so you may be right and I may be wrong. The paperwork that come with out to tell you what size of diconnect to install. Also do not be a retard like my self who put the genset leads on the bottom lugs. The genset is the line not the load.
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#167578 - 08/15/07 04:57 PM Re: 445.18 Disconnect at Generator location & type [Re: sparkyinak]
Yoopersup Offline
Member

Registered: 03/04/03
Posts: 826
Loc: Michigan
This is a very large Generator and came from the factory without a disconnect on it. Thus the question.Owner wants to install the disconnect same room aprox. 40-70 ft away,

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#167581 - 08/15/07 06:39 PM Re: 445.18 Disconnect at Generator location & type [Re: Yoopersup]
sparkyinak Offline
Member

Registered: 07/08/07
Posts: 1286
Loc: Alaska
Closer the better, in sight of not to exceed 50 feet.
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#167591 - 08/15/07 10:56 PM Re: 445.18 Disconnect at Generator location & type [Re: sparkyinak]
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9012
Loc: Estero,Fl,usa
How do you protect the conductors and the generator from a fault in that 50 feet? Are we assuming a short would stall the generator?
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#167610 - 08/16/07 08:16 AM Re: 445.18 Disconnect at Generator location & type [Re: gfretwell]
sparkyinak Offline
Member

Registered: 07/08/07
Posts: 1286
Loc: Alaska
The disconnect needs to be close as practical not to exceed 50 feet. The 50 foot rule is somtimes it is not safe to be right at the equipment or if the equipment is elevated
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#167699 - 08/17/07 07:30 PM Re: 445.18 Disconnect at Generator location & type [Re: sparkyinak]
Yoopersup Offline
Member

Registered: 03/04/03
Posts: 826
Loc: Michigan
Show me the Code sections ? 50ft and within sight is in mtrs .This Generator is 13.8 volts .

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#167702 - 08/17/07 08:33 PM Re: 445.18 Disconnect at Generator location & type [Re: Yoopersup]
frenchelectrican Offline

Member

Registered: 02/06/03
Posts: 938
Loc: Wi/ Paris France { France for ...
 Originally Posted By: Yoopersup
Show me the Code sections ? 50ft and within sight is in mtrs .This Generator is 13.8 volts .


if i am reading this right this is a low voltage or high votlage ??

13.8 volts or 13.8 KV ??

if it is 13.8 KV there is few other rules will show up with this type of voltage i am not too sure where it land but part of it will be not in the NEC

Merci , Marc
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#167707 - 08/18/07 06:24 AM Re: 445.18 Disconnect at Generator location & type [Re: frenchelectrican]
Yoopersup Offline
Member

Registered: 03/04/03
Posts: 826
Loc: Michigan
It is 13.8 KV and Yes it is part of the NEC as its in a hospital not utilty owned.

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