Question 5001 of 749 · Maryland Journeyperson Electrician Exam
At a building or structure, which of the permitted grounding electrodes must be bonded together to form the grounding electrode system?
Exactly one answer is correct.
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Correct answer to question 5001
- A: Every permitted electrode type that is present at the building
Explanation
All electrodes of the types recognized in 250.52(A) that are present at each building or structure must be bonded together into one grounding electrode system. Where none are present, at least one must be installed. This is required by 250.50.
More questions: Grounding and Bonding
- 5002A metal underground water pipe qualifies as a grounding electrode only if it is in direct contact with the earth for at least what length?
- 5003When a metal underground water pipe is used as a grounding electrode, what else does the Code require?
- 5004Under the general rule, interior metal water piping located more than what distance from its point of entrance may NOT be used to interconnect electrodes that are part of the grounding electrode system?
- 5005A concrete-encased electrode made of bare copper conductor must be at least 20 ft long and not smaller than what size?
- 5006A concrete-encased electrode must be covered by at least how much concrete?
- 5007A ground ring encircling a building must consist of at least 20 ft of bare copper conductor not smaller than