Switch and Outlet Box

1. This is a single game nail on box which doesn’t have “cable clamps “ Just easy access “barn doors” and require fastening the romex closer to the box than a box with auto-clamps or conventional types of strain relief. 2. If this had auto clams / strain reliefs you would only take 1 deduction for all the clamps. 3. Plastic boxes are measured and marked by ul with actual volume and all deductions (including wires, devices, hickies, knockouts, etc.) are taking from that number

Yes the Wall boxes are 2 hour fire rated.