250.194 Grounding and Bonding of Fences and Other Metal Structures

Where metal fences are located within 5 m (16 ft) of the exposed electrical conductors or equipment, the fence shall be bonded to the grounding electrode system with wire-type bonding jumpers as follows:

1. Bonding jumpers shall be installed at each fence corner and at maximum 50 m (160 ft) intervals along the fence.
2. Where bare overhead conductors cross the fence, bonding jumpers shall be installed on each side of the crossing.
3. Gates shall be bonded to the gate support post, and each gate support post shall be bonded to the grounding electrode system.
4. Any gate or other opening in the fence shall be bonded across the opening by a buried bonding jumper.
5. The grounding grid or grounding electrode systems shall be extended to cover the swing of all gates.
6. The barbed wire strands above the fence shall be bonded to the grounding electrode system.

All exposed conductive metal structures, including guy wires within 2.5 m (8 ft) vertically or 5 m (16 ft) horizontally of exposed conductors or equipment and subject to contact by persons, shall be bonded to the grounding electrode systems in the area.