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-   -   UF 6-2 or 8-2 (http://www.diychatroom.com/f18/uf-6-2-8-2-a-90090/)

 caliglas 12-20-2010 04:33 PM

UF 6-2 or 8-2

Hello. New here. :) I need to run electric about 800 ft from our barn to power a couple lights and an electric gate. Is 8-2 good enough or do I need 6-2 and how deep should I bury it. I plan on running it next to the driveway. Thanks for any help.
Jerry

 teamo 12-20-2010 05:17 PM

800 ft is quite a distance so you will get significant voltage drop at that distance. You need to determine your power requirements first and then calculate voltage drop to size the wire correctly. What is the amperage draw for the devices that you are installing?

 williswires 12-20-2010 05:22 PM

Depends mostly on the load of the gate operator. 800 feet is a long ways away for a 120 or 240v circuit due to voltage loss.

What are the specs of the operator?
-voltage?
-amps?

What does the barn have that will provide the power?

For a max of 5% voltage drop to the gate motor,
6 AWG will give you around 7-7.5 total amps to use at 120VAC.
6 AWG will give you around 14-15 total amps to use at 240VAC, but you would need 240V light fixtures.

 williswires 12-20-2010 05:23 PM

...jeez! I type too slow, I guess!

 caliglas 12-20-2010 08:12 PM

Thanks for the replies. I don't have the opener, lights, or even the gate yet. Just trying to think ahead. However I would like to add some low voltage lights along the side of the driveway. I suppose 6-2 would be best. How deep should I bury this. I have a trencher that will dig 18".
Jerry

 secutanudu 12-21-2010 07:32 AM

Code usually requires 18" cover for non-GFCI-protected circuits. GFCI circuits can go 12". I'd use THWN wires in conduit as opposed to UF wire, but UF is acceptable too.

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