24.1-06-02-50. (NEC 250) Grounding and bonding.

This lighting standard is about to be inspected before the concrete is poured. Will it pass?
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This lighting standard is about to be inspected before the concrete is poured. Will it pass?

Grounding of metal outdoor lighting standards is specifically addressed in the laws, rules and wiring standards of North Dakota. A lighting standard is a pole exceeding twelve feet in height measured from the bottom of the base or from the intended grade level of poles.

The metal lighting standard shall be connected to a one-half inch by ten-foot copperweld ground rod, or twenty feet 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 in diameter, by the means of a bonding jumper. The ten-foot ground rod shall be driven in the center of the metal standard base and project slightly above the base. Both ground rod and equipment grounding conductor shall be connected to the metal standards. The bonding jumper must be in accordance with 2023 edition, National Electrical Code (first version, printed in 2022), and in no case smaller than no. 8 copper or no. 6 aluminum

Refer to the Laws, Rules and Wiring Standards of North Dakota for additional rules pertaining to lighting standards.

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24.1-06-02-50. (NEC 250) Grounding and bonding.

Below is a Real Question from our Electrical Continuing Education Courses for Electrical License Renewal:

Refer to the image. In North Dakota, why would the lighting standard in the image fail inspection?

A: The copper grounding conductor is too small.
B: The wrong type of ground rod was used and it does not project slightly above the base.
C: The grounding conductor should be aluminum.
D: The ground rod must be listed.
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