What is the term for the device attached between the Third Rail and inner/near running rail that indicates whether circuits or apparatus are energized or de-energized?

• A. Static Wire
• B. Rail Return
• C. Section Break
• D. Third Rail Warning Device

Answer: (D)

In electrified rail systems, it’s essential to know whether power is on in the section you’re working on. The device that is attached between the third rail and the inner/near running rail specifically designed to show whether circuits are energized or de-energized is the Third Rail Warning Device. It provides a clear indication of the live condition so crews can assess safety before proceeding. Other items serve different roles: static wire dissipates static electricity and doesn’t indicate energization, rail return is the current return path, and a section break marks a boundary of an isolated section without serving as an energization indicator.