Moving overhead wires underground.

Randall.1976August 15, 2012

During a recent storm a tree branch struck a piece of overhead conduit between my workshop and garage (span of 10'). Since the conduit must be replaced, I would like to run the wiring underground. Is pvc the only choice? Running lights, door opoeners and outlets to a two-stall garage with a full sized lighted storage loft, what wire would be correct so I could replace the old and run one continuous piece.

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Without knowledge of the circuits that are already in the garage, it's pretty hard to say what wiring is appropriate. I'm not understanding the need for "one continuous piece". Are you concerned about the number of junctions? You can either run conduit with individual wires inside (which provides the most flexibility) or a cable designed for direct burial.

    Bookmark   August 15, 2012 at 9:18AM
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The only advantage of "one continuous piece" would be appearance, not usually important for buried conduit.

Waterproof wiring is required since ALL buried locations are considered wet, and ANY buried conduit eventually fills with water.

There are specific rules about how many circuits can be run between separate structures before a panel is required.

ONE circuit is a common limit between detached buildings.

    Bookmark   August 15, 2012 at 10:55AM
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