What is the first thing you must do before performing any service on an escalator?

The first step that must be taken before performing any service on an escalator is to place barricades at the upper and lower ends. This action is critical for ensuring safety. By setting up barricades, you are preventing access to the escalator while work is being performed, which helps protect both the service personnel and any passersby from potential accidents.

Barricades serve as a clear visual signal that the escalator is out of service, deterring unauthorized use and reducing the risk of injury. This safety measure is a fundamental practice within maintenance protocols, as escalators can pose hazards if they are inoperative or under repair. Other procedures, such as notifying the manager, checking service records, or turning off the power supply, may follow, but establishing a safe work area with barricades is the immediate priority.