Do you need conduit between the main panel and sub-panel


Old 05-31-08, 02:19 PM
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Join Date: Nov 2007
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Do you need conduit between the main panel and sub-panel

If you are installing a sub-panel do you need to run conduit from the main panel (ie. subpanel located 50 ft. from main panel and both panels located in basement).

Another example, you are running an underground rated 3-wire cable (with ground) from your main panel to your garage which is separated from the house. Would you need conduit from the main panel to where the underground rated cable leaves the main house (at which point the cable is buried until it reaches the garage)?

I looked at the CEC and there did not seem any specifications or rules on these questions.

Thanks in advance for your response.

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Old 05-31-08, 03:18 PM
Join Date: Sep 2000
Location: United States
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Conduit is not required, but protection is. You often need conduit to provide the proper protection. In the case of direct-burial cable between structures, it is common to use conduit until reaching the bottom of the trench. Using conduit the entire route may allow you to reduce the burial depth. Otherwise, bury the direct-burial cable at least 24 inches.

These rules are for the U.S. Since you mentioned the CEC, I assume you're in Canada. I strongly suggest you enter your province and country in the Location field of your profile. Otherwise, you're not always going to get the correct advice.

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