What is the maximum rated output for Class 1 Power-Limited Circuits?

In low voltage communication systems, Class 1 Power-Limited Circuits refer to circuits that are designed to operate at a specific output voltage threshold to ensure both functionality and safety. The maximum rated output for these circuits is specified by the National Electrical Code (NEC).

The correct output for Class 1 circuits is 30 volts. This limit is set to minimize the risk of electrical shock and ensure the low voltage nature of the circuit while allowing sufficient power for typical low voltage applications. Class 1 circuits are commonly used in safety-critical systems like fire alarms and security systems where the voltage must be limited to reduce hazards.

Understanding this standard is crucial for anyone working in the field of low voltage communications, as adhering to these voltage ratings can affect the installation's compliance with electrical codes and safety regulations.