How would you determine box fill for a metal box containing two switches and three conductors terminating inside?

• A. Count conductors (each unbroken conductor counts as one), count grounds as one, add one for each internal clamp or device yoke, multiply by the per-conductor volume for the gauge.
• B. Multiply the number of wires by a fixed volume per box.
• C. Only count the number of devices; ignore conductors.
• D. Box fill is not relevant for metal boxes.

Answer: (A)