What is the smallest allowable size for overhead service conductors made of copper?

In the context of the National Electrical Code (NEC) and common electrical installation practices, the smallest allowable size for overhead service conductors made of copper is indeed 8 AWG. This is important because conductor size is critical for ensuring the safety and efficiency of electrical installations.

Using a conductor that is too small can lead to overheating, increased resistance, and potential failure of the electrical system. The NEC sets specific requirements for service conductors to ensure they can safely handle the expected load and incidental environmental factors such as temperature and wind.

The choice of 8 AWG also reflects the minimum standards that can accommodate average dwelling loads without risking overheating, thereby providing a reliable and safe pathway for electricity. Keeping the size within code requirements not only adheres to legal standards but also promotes longevity and performance of the system.