ND Electrician Practice Questions - North Dakota Journeyman Electrician License Exam

Per NEC 250.52(A)(3), what are the minimum dimensions for a concrete-encased electrode (Ufer ground)?

10 feet of 2 AWG bare copper in minimum 2 inches of concrete 20 feet of 4 AWG bare copper in minimum 2 inches of concrete 20 feet of 4 AWG bare copper encased in minimum 2 inches of concrete near the bottom of a footing or foundation 10 feet of 6 AWG bare copper in minimum 3 inches of concrete

Correct Answer:

20 feet of 4 AWG bare copper in minimum 2 inches of concrete

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