Washington Administrative Code(WAC) and Revised Code of Washington (RCW) Electrical Practice Exam

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What main structure component requires inspection before wiring and device boxes can be placed close to it?

Roof frame
Floor joist
Exterior wall
Interior partition

The correct answer is: Exterior wall

The main structure component that requires inspection before wiring and device boxes can be placed close to it is the exterior wall. This is crucial because the exterior wall is a primary structural and protective element of a building, and it often contains components such as insulation, sheathing, and the building's weatherproofing. Before installing wiring and device boxes near exterior walls, it is essential to ensure that there are no existing issues, such as moisture ingress, structural weaknesses, or improper framing techniques that could affect the safety and efficiency of the electrical installations. Additionally, the location of exterior walls may present unique considerations regarding stud spacing and the routing of electrical conduit or cable, which can affect compliance with code requirements. Inspections help in confirming that these factors are accounted for, thus ensuring a safe and code-compliant electrical installation.