[TowerTalk] Coax and control lines in same PVC

[Jim Brown]

On 6/15/2013 12:22 PM, Doug Scribner wrote:
> What are the pros and cons of running all this through the same PVC?

Entirely legal per NEC. Potential crosstalk/RFI issues are no different 
from running them next to each other outside of conduit, and the same 
precautions are appropriate.

1) Where the control lines are connected to electronics, use twisted 
pair for all the control lines, with a pair per circuit. Twisted pair is 
NOT needed if connected to switches and relays on both ends.

2) Use common mode chokes on both control and coax if RFI becomes an issue.

73, Jim K9YC