What is installed to prevent cables from being damaged by drywall screws or nails?

• A. Steel plate
• B. Plastic plate
• C. Grommet
• D. Conduit

Answer: (A)

When cables run through wall studs, nails or screws from the drywall can pierce the insulation and conductor. The way to prevent that damage is to install a protective steel plate over the cable where it sits near the stud face. This steel plate acts as a hard shield that nails will hit instead of the cable, keeping the wiring safe once the wall is finished. It’s installed before the drywall goes up, covering the cable so any fastener is stopped at the plate. A plastic plate wouldn’t offer the same durable protection, and a grommet protects only holes through which cables pass rather than shielding cables from fasteners in the stud area. Conduit provides enclosure for protection along a run but isn’t the standard protective barrier used specifically to guard against drywall nails or screws.