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I am burying electric wire in a PVC conduit from my house to my shed, I want to run RG6 cable for cable TV also, can I run the RG6 in the same conduit as the electric wire? without any trouble or interference?

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No, you cannot. Unless you're not covered by National Electrical Code (or similar), you don't care about following codes, or you're also installing a permanent barrier or listed divider.

National Electrical Code

Chapter 8 Communications Systems.

Article 820 Community Antenna Television and Radio Distribution Systems.

820.133 Installation of Coaxial Cables and Equipment. Beyond the point of grounding, as defined in 820.93, the coaxial cable installation shall comply with 820.133(A) and (B).

(A) Separation from Other Conductors.

(1) In Raceways, Cable Trays, and Boxes.

(b) Electric Light, Power, Class 1, Non–Power-Limited Fire Alarm, and Medium-Power Network-Powered Broadband Communications Circuits. Coaxial cable shall not be placed in any raceway, compartment, outlet box, junction box, or other enclosures with conductors of electric light, power, Class 1, non–power-limited fire alarm, or medium-power network-powered broadband communications circuits.

Exception No. 1: Where all of the conductors of electric light, power, Class 1, non–power-limited fire alarm, and medium-power network-powered broadband communications circuits are separated from all of the coaxial cables by a permanent barrier or listed divider.

You can Either put a second conduit in the trench for communications circuits, or put direct-burial coaxial cable in the trench.

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    Conduit, conduit, conduit. Direct burial is a dirty word when you have the expensive part (trench) done. Conduit means never having to dig that trench again - direct burial just about guarantees that you will have to dig it over. – Ecnerwal May 4 '15 at 23:53
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    @Ecnerwal I agree that conduit is useful if you ever have to run cable again, but direct burial cable is easier and cheaper to install and should last quite a long time. – Tester101 May 5 '15 at 0:04

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