810.21 Bonding, Radio Antenna Grounding – https://www.MikeHolt.com/bonding. You may be surprised at the number of CB and HAM radio operators there are around the country. These radio frequencies require line-of-sight antenna which requires a substantial height (some are hundreds of feet tall) to maintain that line-of-sight. You can probably already figure out that these heights make them a prime target for lightning strikes. Watch this video clip to help you comply with the Code rules for grounding these antennae.