Class 2 circuits are recognized as what type of circuits regarding fire hazard safety?

Class 2 circuits are categorized as power-limited circuits, which means they are designed to operate with a maximum allowable power output that significantly reduces the risk of fire hazards. This classification ensures that the circuit can only deliver a certain amount of current and voltage, thereby minimizing the potential for overheating and electrical fires.

This type of circuit is often used in applications where safety is paramount, such as in control circuits, signaling devices, and low-powered devices. The limitations enforced on Class 2 circuits are crucial because they help prevent conditions that could lead to ignition or fire, making them inherently safer compared to circuits that do not have such restrictions.

The other options do not accurately define Class 2 circuits in the context of fire hazard safety. Unregulated circuits may not have the same power limitations, which could increase fire risk. Low voltage does not necessarily imply that the circuit is power-limited, as there can be many low-voltage applications not classified as Class 2. High risk contradicts the safety provisions established for Class 2 circuits since these circuits are specifically designed to mitigate risks associated with fire hazards.