Which of the following statements best describes a safety protocol in elevator maintenance?

The statement that power should be disconnected before servicing the elevator accurately reflects a fundamental safety protocol in elevator maintenance. Disconnecting power is crucial as it ensures that the elevator system is completely de-energized, preventing accidental movements or electrical shocks while maintenance personnel are working on the equipment. This practice protects not only the technicians performing the maintenance but also anyone who might inadvertently interact with the elevator during the service.

Proper safety protocols are essential in the highly regulated environment of elevator maintenance, where any oversight can lead to serious injuries or equipment damage. This approach is a standard industry practice and aligns with safety regulations and guidelines designed to safeguard workers in the field.

In contrast, the other statements present unsafe or impractical practices that do not comply with standard safety measures. For instance, performing maintenance without proper equipment undermines worker safety, while keeping emergency exits unlocked could pose risks during maintenance activities. Allowing maintenance to occur at any time without warning could lead to unsupervised or hasty actions, further endangering personnel and passengers.