Box fill calculations take into account which of the following items?

• A. Conductors, devices, clamps.
• B. Exterior color of the box.
• C. Location of building permit.
• D. Type of paint used on wall.

Answer: (A)

Box fill is about making sure there’s enough space inside a box for all wiring and hardware that occupy it. The items that count toward that space are the conductors that enter or splice in the box, the devices mounted in the box (like switches or receptacles), and any internal clamps that secure conductors. In addition, all equipment grounding conductors together count as one conductor, and each device’s yoke or strap counts as one conductor toward the total fill. This is why the option listing conductors, devices, and clamps aligns with what box fill calculations require. The exterior color of the box, where the building permit is located, or the type of paint on the wall don’t affect how much volume is needed for the box.