12-2 underground feeder in conduit


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Old 05-21-17, 06:54 PM
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12-2 underground feeder in conduit

Hello,

Need to run (2) lines of 12-2 with ground underground feeder for irrigation pumps. One line will be 240v and one will be 120v.

Need to go under a walkway. Can I place both of these lines in 3/4" conduit under the walkway only? 1" conduit? If neither, what size conduit do I need while going under the walkway?

Thanks in advance for your assistance.
 
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Old 05-21-17, 07:04 PM
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1" will be easier to feed the cable into. Remember you will need to bury the cable 24" alone, or 18" if it is in conduit.

Depending on what you are doing it might be easier to run a single 3 wire cable (12/3 or 10/3) and install a small sub panel to run your equipment.
 
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Old 05-21-17, 07:27 PM
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Thank you for the reply.

I will be renting a trencher as I will also be trenching for the irrigation lines.

I wanted to make sure there wasn't any issue regarding running both of the lines through the 1" conduit. I appreciate the advice on 1" being easier.

As an additional option, in order to dig less deep, if I were to run 6 single wires (3 for each pump) could all of this be placed in the same 1" conduit?

Thanks again.
 
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Old 05-21-17, 08:34 PM
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if I were to run 6 single wires (3 for each pump) could all of this be placed in the same 1" conduit?
1" will hold 26 #12 wires. " will hold 16 #12 wires. You only need five wires. The two circuits can share the same ground wire.
 
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Old 05-22-17, 05:57 PM
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Thanks for the reply. Appreciate you taking the time.
 
 

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