An HVAC access detail requires a clear 18-inch path above a service panel. A new cable tray reduces it to 12 inches. What is the shortfall relative to the specified detail?
- A12 inches
- 6 inches
- C18 inches
- D30 inches
Where to look it up
Explicit exercise assumptions; not a universal code requirement.
Why B is correct
18 − 12 = 6 inches. Resolve the coordination conflict against the actual access detail; the exercise does not invent a universal ceiling clearance.