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Old 10-18-2019, 04:17 PM   #1
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Length of wiring from panel to generator inlet box?


Iím looking to install a generator inlet box on the outside of the house and run it to the breaker box to an interlock switch setup.. Would a run of about 40ft be acceptable from the inlet to the breaker box?


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Old 10-18-2019, 05:00 PM   #2
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Re: Length of wiring from panel to generator inlet box?


40 feet is no issue at all.
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Old 10-18-2019, 05:07 PM   #3
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Re: Length of wiring from panel to generator inlet box?


Not an issue as long as the wire size is correct.
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Old 10-18-2019, 06:26 PM   #4
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Re: Length of wiring from panel to generator inlet box?


Quote:
Originally Posted by joecaption View Post
Not an issue as long as the wire size is correct.


Is there a chart or guide for wire size for a specific length and load?


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Old 10-18-2019, 06:54 PM   #5
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Re: Length of wiring from panel to generator inlet box?


Quote:
Originally Posted by Maine1 View Post
Is there a chart or guide for wire size for a specific length and load?


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Of course there is

I'll assume your in the US, so NEC applies. If you post the watts of your gen, someone will help you out.
As RjNiles said, 40' is not an issue.
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Old 10-18-2019, 06:59 PM   #6
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Re: Length of wiring from panel to generator inlet box?


Thanks! Turns out I have another issue so I started a new post..


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Old 10-18-2019, 07:03 PM   #7
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Re: Length of wiring from panel to generator inlet box?


Quote:
Originally Posted by Maine1 View Post
Is there a chart or guide for wire size for a specific length and load?


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Size the wire based on the capacity of the gen set.

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Old 10-18-2019, 08:53 PM   #8
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Re: Length of wiring from panel to generator inlet box?


How big is the generator?
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Old 10-20-2019, 04:26 PM   #9
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Re: Length of wiring from panel to generator inlet box?


I have a similar question. I am installing a 30A transfer switch for a 8000W generator. Distance from the switch to power inlet box is approximately 30ft.
How thick should the wire be?
I am planning to use 10/3 armored cable - is it ok?
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Old 10-20-2019, 07:36 PM   #10
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Re: Length of wiring from panel to generator inlet box?


30 feet is not a length that needs to be oversized. #10 is fine.
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