Which of the following best describes Class 1 circuits?

Class 1 circuits are primarily associated with installations that involve life safety. These circuits carry higher voltages (typically over 30 volts) and are subject to more stringent regulations due to the potential hazards they pose. Since they are utilized in systems such as fire alarms, emergency lighting, and other critical safety functions, proper installation and adherence to safety codes are paramount.

The emphasis on life safety in Class 1 circuits ensures that they must be installed by qualified personnel who understand the risks and technical requirements involved. This classification indicates a higher level of responsibility for contractors working with such systems to ensure safety and compliance with the relevant electrical and safety standards. Thus, the focus on life safety is a defining characteristic of Class 1 circuits.