If Single-Gang Nail-On non-metallic boxes are used with NM cable, what is required?

• A. A direct connection to the box
• B. No connection to the box is required
• C. Grounding of the box
• D. Special insulation

Answer: (B)

When using Single-Gang Nail-On non-metallic boxes with NM (non-metallic) cable, it is important to understand the design and function of these boxes in relation to the cable they house. NM cable is typically used in residential installations and consists of insulated conductors encased in a non-metallic sheath.

In the case of these non-metallic boxes, they are specifically designed for use with NM cable and do not require any special connection to the box itself. The NM cable can simply be inserted into the box through the appropriate entry points, and the inner conductors are connected to the appropriate terminals without the need for additional connections to the box. This simplifies installation and enhances convenience because the box does not need to be grounded or bonded in the same manner as metallic boxes.

Overall, the lack of requirement for a direct connection to the box highlights the straightforward nature of using NM cable with non-metallic boxes, making them user-friendly for electricians and DIY enthusiasts alike.