What is the minimum size copper conductor permitted for use for a 6,000 volt service?

For a 6,000-volt service, the minimum size of copper conductor is determined by the National Electrical Code (NEC) and other regulatory standards governing electrical installations. These standards impose specific requirements for conductors based on voltage levels to ensure safety and efficiency.

The correct answer reflects the standards that specify a minimum conductor size that can safely carry the necessary current without overheating or degrading over time. In this case, a 6 AWG copper conductor is suitable for such a voltage level. This size provides an appropriate balance between conductivity, mechanical strength, and insulation requirements, ensuring that it can handle expected loads safely while minimizing resistance and potential voltage drop.

Choosing a conductor size that is excessively small could result in overheating or failure under load conditions, which is critical to preventing electrical hazards. Therefore, in a 6,000-volt service, the selected 6 AWG copper conductor meets the necessary requirements for safety, performance, and compliance with electrical codes.