Proper Bonding Locations for Grounding Antenna Mast/Signal Conductor

There are 5 general locations where you can ground an antenna mast and coax. 

1. Electrical service electrode (ground rod), or the conductor that connects the ground rod to the electrical service panel. 

The ground rod must be the main electrical ground rod(s), or if a separate ground rod is installed, bonded to the primary ground with 6 gauge ground wire. 

Ground Rod

2. The metal electrical service panel enclosure utilizing a PAM style clamp. Cannot be installed on the door or cover. 

PAN clamp on meter housing

3. A metal service electrical raceway. This is the raceway entering the service panel containing the service conductors.


Strap on service raceway

4. Waterpipe. BUT ONLY within five feet of the water pipes entrance to the structure and only if the water pipe is metal and in direct earth contact for at least 10 feet before entering the property.

Ground wire on water service pipe

Attaching a ground wire to a water valve is NOT ACCEPTABLE and can lead to dangourus conditions for residence or staff of the building

Ground wire on faucet

5. The grounded metal structure of a building. If the building's metal structure is grounded by one of the above means, a ground wire can be bonded to the metal structure. This is usually used with mobile homes and commercial buildings. 


6.  Intersystem Bonding Termination. 

Grounding bus bar


NEC Code Reference

Article 810.15 covers the mast grounding requirement.

Article 810.20 covers the grounding of radio distribution systems