Chime transformers are listed as _______ because of their low voltage rating and power limitation.

Chime transformers are classified as Class 2 because they are designed to operate at low voltage levels and have limited power output. This classification ensures that they are used in applications where the electrical system is intended to be safer for general use, minimizing risks such as electrical shock and fire hazards.

Class 2 circuits, according to the National Electrical Code (NEC), are defined by their restrictions on voltage and power. Specifically, Class 2 circuits are limited to a maximum of 60 volts and 100 VA (volt-amperes). This makes them suitable for devices like doorbells, chimes, and similar low-power devices where higher voltages and power levels would be unnecessary and potentially dangerous.

The design and use of Class 2 transformers, such as chime transformers, are critical in protecting users while providing adequate power to operate common low-voltage devices.