What is the smallest overhead service conductor permitted by the NEC for loads other than limited loads of a single branch circuit?

The National Electrical Code (NEC) establishes specific guidelines for the sizing of overhead service conductors to ensure safety and proper functionality. For loads other than limited loads of a single branch circuit, the NEC specifies a minimum conductor size requirement.

In this context, the smallest overhead service conductor size permitted for general loads is No. 8 copper (Cu). This size is stipulated because it provides adequate carrying capacity and ensures that the system can handle the necessary load without overheating or causing other issues. Copper conductors are favored for their superior conductivity, meaning they can effectively transmit electricity with less resistance compared to aluminum conductors.

Understanding this requirement is essential for compliance with code and for ensuring that electrical installations are safe and reliable. The other options, while they may represent conductor sizes that could be suitable for specific situations or limited applications, do not meet the NEC requirement for general overhead service conductors that carry loads beyond a single branch circuit.