Per Article 404 Part II., switches are at least required to be marked in accordance with which of the following?

• A. Voltage and current ratings
• B. Manufacturer's name
• C. Wiring diagram
• D. Physical size

Answer: (A)

The essential requirement being tested is that switches carry markings showing their electrical limits. Under NEC Article 404 Part II, the minimum marking on a switch is its voltage rating and current rating. These two numbers define the safe operating envelope: the voltage rating shows the maximum voltage the switch’s contacts and insulation can safely handle, and the current rating indicates the maximum current the switch can carry or interrupt without overheating or arcing. This helps ensure the switch is used in circuits that stay within its design limits and that protective devices are properly coordinated. Other details like the manufacturer's name, a wiring diagram, or the physical size may appear, but they are not the required minimum markings for this section.