How does the NEC define 'Class 2 power limited circuits'?

'Class 2 power limited circuits' are defined by the National Electrical Code (NEC) as circuits that are designed to operate at low voltage and have a power limitation that reduces the risk of electric shock. Specifically, these circuits have a maximum output power of 100 VA (volt-amperes) and a maximum voltage of 60 volts DC or 30 volts AC under normal conditions, providing a significant margin of safety compared to higher voltage circuits.

This definition emphasizes that the primary purpose of these circuits is to ensure safety, especially in applications where users may come into direct contact with components. By limiting the power and voltage, Class 2 circuits minimize the risk associated with electric shock, making them suitable for various low-power applications such as security equipment, electronic controls, and some types of lighting.

The other options describe aspects that do not align with the NEC definition. For instance, standard voltage levels do not pertain specifically to Class 2 circuits, as they operate below standard voltages to ensure safety. Furthermore, Class 2 circuits are not restricted to commercial applications or specifically designed for low voltage lighting, as they have a broader range of applications in both residential and commercial settings.