(NEC 250) Grounding and bonding

Grounding and bonding must conform to article 250, 2026 edition, National Electrical Code (first version, printed in 2025). 1. At motor connections, a bonding jumper sized in accordance with table 250.122, 2026 edition, National Electrical Code (first version, printed in 2025), must be provided around all flexible conduit. The bonding jumper is not required if a separate grounding conductor is included. 2. Grounding of metal outdoor lighting standards. a. Definition of lighting standard is a pole exceeding twelve feet [3.66 meters] in height measured from the bottom of the base or from the intended grade level of poles. b. The metal lighting standard must be connected to a one-half inch [12.70-millimeter] by ten-foot [3.05-meter] copperweld ground rod, or twenty feet [6.10 meters] of one or more bare or zinc galvanized or other electrically conductive coated steel reinforcing bars or rods (rebar) of not less than one-half inch [1.27 centimeters] in diameter, by the means of a bonding jumper. The ten-foot [3.05-meter] ground rod must be driven in the center of the metal standard base and project slightly above the base. Both ground rod and equipment grounding conductor must be connected to the metal standards. The bonding jumper must be in accordance with 2026 edition, National Electrical Code (first version, printed in 2025), and in no case smaller than no. 8 copper or no. 6 aluminum. 3. The grounding electrode conductor must be connected to the grounded service conductor in the enclosure for the service disconnect.