Answer: 3/8 in. Explanation: Section 314.5(3) states, "Screws attaching a cover shall extend no more than 3/8 in. into the box." Lupacchino is a senior design engineer with Gaylor Electric, Inc. in ...

This answer is based on the 2017 NEC. A. Surface extensions can only be made from an extension ring installed over a box [Sec. 314.22]. Exception: A surface extension can be made from the cover of a ...

If you have the walls opened up for remodeling or putting on an addition, these three boxes cover about 99 percent of your ...