What key factor differentiates Class 2 circuits from Class 1 circuits?

The primary distinction that separates Class 2 circuits from Class 1 circuits lies in the maximum voltage limits. Class 2 circuits are designed to operate at lower voltage levels, specifically limited to 60 volts (V) or less, while Class 1 circuits can operate at higher voltage levels, exceeding 60 volts. This voltage restriction for Class 2 circuits contributes to enhanced safety, allowing for reduced shock hazards and making them suitable for use in various low-voltage applications, such as fire alarms, low-voltage lighting, and building communications.

The lower voltage limit also impacts installation requirements and performance characteristics, as Class 2 circuits are not required to have as rigorous protection measures compared to Class 1 circuits, which can potentially carry dangerous voltages. Understanding this key factor is crucial for professionals working in low voltage communication systems, ensuring the appropriate selection and installation of circuitry based on voltage requirements and safety standards.