A Class _____ Circuit operates between the load side of a Class 2 power source and connected equipment.

A Class 2 circuit is specifically defined by the National Electrical Code (NEC) as having a maximum output of 100 watts and a maximum voltage of 60 volts, both AC and DC. This classification is important because it allows for safer installations with lower risks of fire or electric shock. Class 2 circuits have particular requirements that facilitate their use in various applications, especially in communication and signaling systems.

In the context of the question, the Class 2 circuit operates between the load side of a Class 2 power source and any connected device. This means that any equipment that connects to a Class 2 circuit must be compatible with the parameters set forth for Class 2, ensuring safety and reliability in the operation of low-voltage communication systems. Understanding these classifications is crucial for contractors working with low voltage systems, as it helps ensure compliance with safety standards and regulations.