Fill in the blanks. Power distribution blocks installed in boxes shall be listed. Power distribution blocks installed on the line side of service equipment shall be ________ and ________ as “suitable for use on the line side of service equipment” or equivalent.
A) approved / identified B) accessible / installed C) suitable / identified D) listed / marked
See the Answer Below
Answer: D
As specifically noted in Sec. 314.28(E)(1) of the 2017 NEC, “Power distribution blocks installed in boxes shall be listed. Power distribution blocks installed on the line side of service equipment shall be listed and marked as ‘suitable for use on the line side of service equipment’ or equivalent.”
Owen is the owner and president of National Code Seminars and the holder of master electrician certifications in 46 states. He can be reached at [email protected].