The smallest feeder conductors permitted to be installed are what size AWG or kcmil?

The smallest feeder conductors that can be installed are dictated by the National Electrical Code (NEC) and are contingent on the specific application and requirements of the electrical system. In general, the minimum size for feeder conductors is determined by the load they are required to carry and the ampacity needed for safe operation.

For feeders, the code typically designates 10 AWG as the minimum size for conductors under certain conditions, such as specific installation scenarios or load types. This size allows adequate current-carrying capacity for residential and commercial feeders while maintaining safety standards.

In contrast, smaller sizes like 12 AWG or 6 AWG would not meet the requirements for many feeder scenarios, as they may not support sufficient load or could risk overheating and potentially create unsafe conditions. Therefore, choosing 10 AWG as the smallest permissible size aligns with the standards set forth to ensure safety and reliability in electrical installations.