Which components of risk are impacted by a circuit breaker equipped with an energy reduction maintenance switch?

A circuit breaker equipped with an energy reduction maintenance switch is designed to enhance safety during maintenance work by reducing the likelihood of an electrical incident. This switch allows for the intentional reduction of power to the circuit, minimizing exposure to live electrical components while work is conducted.

By addressing the likelihood aspect, the maintenance switch reduces the chances of an electrical shock or arc flash occurring during maintenance activities. The installation of the energy reduction feature contributes to a safer work environment, particularly when employees are working in proximity to energized equipment.

Moreover, the severity of potential incidents is also impacted by this technology. When energy is reduced, even if an incident were to occur, the energy available to cause harm is minimized. This results in potentially less severe outcomes in the event of a fault or accident during maintenance work.

Thus, the combination of these two effects—lowering both the likelihood of an incident and the severity of the consequences—justifies why the correct answer is that both likelihood and severity are affected by the operation of an energy reduction maintenance switch in a circuit breaker.