What is the correct definition of a power-limited circuit?

A power-limited circuit is defined as a circuit designed to restrict the amount of current that can flow through it, ensuring safety and reducing the risk of fire or equipment damage. This limitation is typically achieved through the use of specific equipment and design parameters that prevent the circuit from carrying more current than is deemed safe.

By controlling the current, power-limited circuits are used in various low-voltage applications, including communication systems, signaling, and alarm systems, where it is crucial to maintain low power levels for safety and compliance with electrical codes. This also allows for the use of smaller conductors, less robust protective devices, and reduced installation costs in low-voltage applications.

The other options do not accurately capture the nature of power-limited circuits. For example, stating a circuit operates above standard voltage does not relate to the concept of current limitation. Similarly, a circuit characterized by high amperage or one without load limitations contrasts with the principle of power limitation, which directly focuses on current management for safety and efficiency.