Transformers and low-voltage wiring for doorbells are classified as what type of circuits under Article 725?

The classification of transformers and low-voltage wiring for doorbells as Class 2 circuits under Article 725 is grounded in the requirements and characteristics defined for these types of circuits. Class 2 circuits are designed to provide a low level of energy, ensuring a degree of safety and limiting the risk of electrical shock or fire hazards.

According to the National Electrical Code (NEC), Class 2 circuits have specific current and voltage limitations, which help minimize the associated risk while still providing the necessary functionality for devices such as doorbells. These circuits can typically operate at a maximum voltage of 60 volts and have restrictions on the amount of power they can deliver, thus providing safe operation in environments where higher voltages are not present or permitted.

The context set by the NEC emphasizes that Class 2 circuits are commonly utilized for low-voltage applications, including doorbells and various types of signaling devices. This is important for ensuring compliance with safety regulations and for the appropriate installation of these systems in residential and commercial buildings.