What is required for equipment that operates at high voltages during maintenance?

The requirement for equipment that operates at high voltages during maintenance is to ensure safety and prevent accidental energization. Visible open points and tagging are critical for several reasons. First, they provide clear visual cues that indicate portions of the electrical system that are de-energized or disconnected, allowing maintenance personnel to work safely without the risk of electrical shock. Tagging the equipment serves as a warning to others that maintenance is taking place and that these points should not be re-energized until the work is completed.

Additionally, visible open points help ensure that maintenance workers are aware of the status of individual components, preventing unexpected hazards. This practice is aligned with safety protocols that prioritize the identification and locking out of high-voltage sources. In high-voltage maintenance scenarios, comprehensive tagging and the obvious indication of open points are fundamental to risk mitigation.

Other options, while important aspects of safety and maintenance procedures, do not specifically address the immediate need for visible indications and tagging while working on high-voltage equipment.