Grounding Electrodes for Structures.

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Maine has additional state-specific resources including laws, rules, and most common electrical law violations based on the 2020 National electrical Code (NEC).

See below section or click on the following link to view all of the most common electrical violations in Maine: Common Law Violations

Common 2020 National Electrical Code Violations:

  1. Separate structure grounding electrodes not installed. [250.32A]

Buildings or structures supplied by a feeder or branch circuit require a grounding electrode system be installed as per Part III of article 250. No grounding electrode system is required for a building or structure supplied by a single branch circuit which includes an equipment grounding conductor.

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Grounding Electrodes for Structures.

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

Which of the following is true regarding the grounding electrode system for a structure supplied by a feeder?

A: A building or structure supplied by a feeder shall require a concrete encased electrode.
B: A building or structure supplied by a feeder shall NOT require a grounding electrode system.
C: A grounding electrode system shall be required for a structure supplied by a single branch circuit which includes an equipment grounding conductor.
D: A grounding electrode system is not required for a building or structure supplied by a single branch circuit which includes an equipment grounding conductor.
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