What precaution is necessary to prevent accidental shock when working with power exceeding 300 volts?

To ensure safety when working with power exceeding 300 volts, having a safety observer present is crucial. The safety observer serves as an additional layer of protection by monitoring the work environment and assisting in maintaining safety protocols. Their presence can help identify unsafe practices or potential hazards that the technician might overlook while focusing on the task at hand. This approach is particularly beneficial in high-voltage situations, as it allows for immediate response in case of an incident, thereby enhancing the overall safety measures.

While keeping power disconnected, using insulated gloves, and ensuring equipment is properly grounded are all important safety practices, they do not directly address the need for real-time oversight and immediate assistance when working with high-voltage equipment. The presence of a trained observer can provide critical support and intervention that prevents electrical accidents.