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Code Q&A

Aug 4, 2011 12:30 PM, By Mike Holt

Q. Is it acceptable to install communication cable in the same lighting pole that is being used as a raceway for lighting conductors?

A. Only if there is a barrier or listed divider between the communication cable and the power conductors. Communications conductors must not be placed in any raceway, compartment, outlet box, junction box, or similar fitting with conductors of electric light, power, or Class 1 circuits [800.133(A)(1)(d)].

Ex 1: Communications circuits can be within the same enclosure with conductors of electric light, power, and Class 1 circuits, where separated by a permanent barrier or listed divider.

Separation is required to prevent a fire or shock hazard that can occur from a short between the communications circuits and the higher-voltage circuits.

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