At what voltage must switchgear serve as an isolation point for work on a circuit?

The correct voltage at which switchgear must serve as an isolation point for work on a circuit is 750 volts. This standard is important for ensuring safety during maintenance and other work performed on electrical systems. When the voltage exceeds this threshold, specific safety protocols and isolation procedures become necessary to protect workers from the risk of electrical shock and to ensure a secure work environment.

At voltages above 750 volts, additional safety measures are required because the potential for hazardous situations increases significantly. These measures may include the use of specialized protective equipment and more stringent lockout/tagout procedures to minimize the risk of accidental energization of the equipment.

Understanding this requirement is crucial, as it aligns with industry safety standards and practices designed to protect workers from high-voltage hazards. By ensuring that switchgear serves as an isolation point at this specific voltage level, it helps establish a clear demarcation for safe work practices in high-voltage environments.