[TowerTalk] 220v trench proximity to 7/8” feedline trench?

[Steve Maki]

Right, that's why I narrowed it down to 60 Hz field concerns, and didn't 
mention codes. I assumed folks would be able to parse that out.

-Steve K8LX

On 08/07/20 18:29 PM, john nistico wrote:

> You should never run line voltage in the same conduit or within 3 feet of lines unless the insulation voltage ratings are rated for the same voltage. This is as per the national electric code.


> If it's the 60 Hz field being close to the other cables that you're
> concerned with, just de-energize the AC cable when not needed.
> 
> I have some some 120V AC lines in the same conduit as my rotator and
> relay control lines, with direct buried Heliax just above and below the
> conduit (up to to 500' runs), and have not noticed any issues. Normally
> I only energize the AC when I need to do some soldering or run a capstan
> winch out there, but sometimes forget to flip the breakers off for
> extended periods.