Why is proper box fill important, and what could happen if it is undersized?

• A. It ensures there's enough space for conductors and reduces risk of overheating and insulation damage; undersized boxes can cause insulation damage and fire hazards.
• B. It only affects the color of the box.
• C. It is not important; any size works.
• D. It only matters for cosmetic reasons.

Answer: (B)