What is the minimum size service drop conductor permitted for copper?

The minimum size service drop conductor permitted for copper is indeed 8 AWG. This is established by the National Electrical Code (NEC) standards, which specify the accepted conductor sizes based on the ampacity ratings and other factors that ensure safety and reliability in electrical installations.

Typically, the minimum size is determined by the load requirements and the distance of the service drop. For copper conductors, 8 AWG is sufficient for most residential applications rated at lower amperages, ensuring that it can handle the current without overheating under normal conditions. The choice of 8 AWG helps maintain safety while providing adequate performance under typical service conditions.

Larger gauges, such as 6 AWG or 4 AWG, are often used for higher loads but exceed the minimum requirements for typical copper service drops. While smaller gauges like 10 AWG may be used for certain applications, they do not meet the minimum size needed for safe service drops under standard conditions.