Explanation: Section 250.52(A)(1) requires the pipe to be in direct contact with the earth for a minimum of 10 ft but no minimum depth is required. John Lupacchino is a senior design engineer with ...

Courtesy of www.MikeHolt.com All questions and answers are based on the 2020 NEC. Q. What techniques does the Code require for the protection of electrical and electronic equipment in hazardous ...