[TowerTalk] coax entry

[Jim Lux]

The code is actually fairly silent on this kind of thing. You need to have a listed Antenna Discharge Unit, which virtually no hams do.  The usual HF PolyPhaser or ICE units are not listed for this application. The feedline has to be enclosed in a continuous metal shield (the coax shield doesn't count, that's only for Cable TV) which has to be bonded with the house's grounding system using appropriately sized wire.

Bringing the feedline in from underground is a bit different than the usual scheme. You need to have the bonding/grounding point of the feedline at the point of entry, but off hand, I'm not sure if that's at the tower (in the original poster's situation) or where the conduit comes into the house.



-----Original Message-----
>From: Norm Duxbury <duxburyn at bellsouth.net>
>Sent: Jan 20, 2010 12:12 PM
>To: "Tower and HF antenna construction topics." <towertalk at contesting.com>
>Subject: Re: [TowerTalk] coax entry
>
>Do what your local electrical code specifies.