Final answer:
When a current higher than the FLC is maintained in a circuit, equipment and conductors may overheat and be damaged.
Step-by-step explanation:
When a current higher than the full load current (FLC) is maintained in a circuit, equipment and conductors may overheat and be damaged (option c). This is because the components of the circuit are designed to operate within a specific range of current, and exceeding this limit can cause them to malfunction or fail. Therefore, it is important to ensure that the current in a circuit does not exceed the FLC to avoid potential damage.