In pre-wired installations, wiring should be installed before which construction stage?

In pre-wired installations, wiring should be installed before which construction stage?

• A. Finishing
• B. Drywall
• C. Painting
• D. Insulation

Answer: (B)

Wiring must be installed while the wall cavities are open so cables can be routed through studs, reach outlets and switches, and be inspected and tested before the walls are closed. Once drywall goes up, access to those wires and boxes is blocked, making changes difficult, costly, or unsafe. Insulation and drywall typically occur after rough-in electrical, but the key idea is that wiring needs to be in place before the wall finish is applied. Therefore, wiring should be installed before drywall.

Wiring must be installed while the wall cavities are open so cables can be routed through studs, reach outlets and switches, and be inspected and tested before the walls are closed. Once drywall goes up, access to those wires and boxes is blocked, making changes difficult, costly, or unsafe. Insulation and drywall typically occur after rough-in electrical, but the key idea is that wiring needs to be in place before the wall finish is applied. Therefore, wiring should be installed before drywall.