Suppose your broadband service provider has run cables to an interface box on your building exterior and has run a small ground wire from the cable shields or connector sleeves to a local ground rod. This setup violates the requirements of Art. 250 Part V because those cable shields are at a different potential from the other metallic objects. The ground rod itself isn't a bonding jumper and neither is the soil in which it’s buried.
To fix this, you have two options:
- Remove the ground rod. Using the proper clamps, bond the broadband cabling shields/connectors to a nearby equipment grounding (bonding) jumper so the cabling is at equipotential to the other metallic objects.
- Leave the ground rod in place, but ensure the grounding wire is adequate and proper clamps are used. Then run a bonding jumper from that rod to a nearby equipment grounding (bonding) jumper (again, using the proper clamps). This makes the rod a supplemental rod instead of a useless rod.
