In terms of safety, what is the minimum approach distance for an unqualified worker in a 69kV yard?

The minimum approach distance for an unqualified worker in a 69kV yard is defined primarily to ensure safety from electrical hazards. For voltages like 69kV, there are established guidelines that govern how close an unqualified individual can approach exposed energized parts.

The correct answer is based on the National Electrical Safety Code (NESC) and other regulatory standards, which stipulate that for voltages up to 69kV, the safe distance is typically set at around 10 feet. This distance is crucial for preventing electrical shock and potential injury due to arc flash or electrical contact.

Other distances provided in the options are generally associated with higher voltage levels or may be applicable in different contexts but do not apply to the specified scenario in this case. Understanding these standards is essential for maintaining safety practices in electrical environments.