What are the requirements when a switch is used for protection on tracks other than the main track?

When a switch is used for protection on tracks other than the main track, specific requirements must be met to ensure safety and proper operation. These requirements include having the switch lined against movement and properly tagged, which prevents accidental movement and informs personnel that the switch is not to be used. Additionally, the switch must be effectively spiked, clamped, or locked to maintain its position and further enhance safety. This ensures that the switch remains secure and cannot be inadvertently moved, thereby safeguarding maintenance workers and other railroad operations.

Meeting all these criteria—tagging the switch, securing it against movement, and ensuring it is locked or spiked—collectively provides a comprehensive safety measure. This is essential particularly when work is being performed on tracks that are not classified as main tracks, where the risk of unintended train movement can have serious consequences. By following all these procedural requirements, the safety of personnel and the integrity of work zones are upheld, highlighting the importance of adherence to these rules in maintenance work.