The minimum size circuit conductors permitted in figure 230.121 are what size in AWG?

The minimum size circuit conductors permitted in figure 230.121 is 6 AWG. This standard is established in the National Electrical Code (NEC) to ensure safety and efficiency in electrical installations. When choosing conductors for service entrance conductors, larger gauge wires, such as 6 AWG, are specified to handle higher current loads while minimizing resistance and heat generation.

Using a conductor that is too small can lead to overheating and potential fire hazards due to excessive current flow. Therefore, the code sets a minimum size to ensure that conductors can safely carry the electrical load they are intended for without exceeding their temperature ratings, contributing to overall system reliability and safety in electrical installations.