Which component has a mechanical interlock preventing movement if open?

• A. Masonry Anchors
• B. Call/Send Control Station
• C. Platform Gate
• D. Interlock Wiring

Answer: (C)

Safety interlocks at the platform gate are designed to stop movement if the gate is open. The platform gate is the barrier at the edge of the landing, and it includes a mechanical interlock that interrupts the drive circuit whenever the gate isn’t fully closed. This ensures the escalator or moving walk cannot operate with a gap open where a passenger could fall in. When the gate is closed, the interlock allows the machine to run; if the gate opens, the interlock trips and prevents movement.

Masonry anchors are simply structural hardware used to secure components; a call/send control station is used to start or stop operation but doesn’t mechanically prevent movement due to an open gate; interlock wiring refers to the electrical connections that carry the interlock signal, not the device itself that stops movement.