HOLT Electricians Practice Exam

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What is the minimum thickness for a faceplate of a flush-mounted snap switch made of a nonferrous metal?

.02 inches
.04 inches
.06 inches
.08 inches

The correct answer is: .04 inches

For a flush-mounted snap switch made of a nonferrous metal, the National Electrical Code (NEC) outlines specific requirements to ensure safety and performance. The minimum thickness for a faceplate is established to provide adequate strength and durability to protect the electrical components within. In this context, a faceplate that is .04 inches thick meets the minimum standard. This thickness is essential to prevent bending or deformation, especially in applications where switches may be operated frequently. It also ensures a proper fit against the wall and minimizes the risk of electrical hazards, such as exposed wiring or components. By adhering to this minimum thickness, installers can ensure that the faceplate will withstand normal wear and tear while maintaining a safe operational environment.