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Open Roads Forum  >  Tech Issues

 > Wire gauge for a 200 ft run on 30 amps or 50 amps?

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map40

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Posted: 02/12/21 11:40am Link  |  Quote  |  Print  |  Notify Moderator

Anybody has a good calculator for wire gauge? I need to do a wire run of 200ft buried wire. I can do 50amps or 30amps. Any advise will be greatly appreciated!


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Posted: 02/12/21 12:04pm Link  |  Quote  |  Print  |  Notify Moderator

wire size calculator (dot) net


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map40

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Posted: 02/12/21 12:10pm Link  |  Quote  |  Print  |  Notify Moderator

Thanks! What would be an acceptable voltage drop? 5%?

Old-Biscuit

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Posted: 02/12/21 12:26pm Link  |  Quote  |  Print  |  Notify Moderator

3% Max Voltage drop for that 200' run

Otherwise you will have Low Voltage any time the supply voltage drops below 115V


50A #1AWG
30A #3AWG

Do NOT scrimp on the wire size...........


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Posted: 02/12/21 12:27pm Link  |  Quote  |  Print  |  Notify Moderator

Don't throw away your money!!! Run the 50A and be done with it.


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map40

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Posted: 02/12/21 12:28pm Link  |  Quote  |  Print  |  Notify Moderator

Old-Biscuit wrote:

3% Max Voltage drop for that 200' run

Otherwise you will have Low Voltage any time the supply voltage drops below 115V


50A #1AWG
30A #3AWG

Do NOT scrimp on the wire size...........

Thanks and thanks for the advise!

2oldman

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Posted: 02/12/21 12:53pm Link  |  Quote  |  Print  |  Notify Moderator

advice.

Boon Docker

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Posted: 02/12/21 01:05pm Link  |  Quote  |  Print  |  Notify Moderator

The grammar gods have struck again. [emoticon]

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Posted: 02/12/21 01:09pm Link  |  Quote  |  Print  |  Notify Moderator

I'll second what @Old-Biscuit said. Don't scrimp on wire. As wire is expensive in those sizes, it is none the less the cheapest part of the whole deal, when you consider also the just the hassle of blown fuses/breakers, brown-out damaged gear, etc.





enblethen

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Posted: 02/12/21 01:18pm Link  |  Quote  |  Print  |  Notify Moderator

3% for voltage drop.
Hopefully, Old Biscuit is indicating copper wire and not aluminum.
Direct burial or are you going to put in conduit?


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