What is the minimum wire size allowed for residential branch circuits in Alabama?

The minimum wire size allowed for residential branch circuits is 14 AWG. This size is typically used for circuits that are designed to carry a load of up to 15 amps. In residential settings, many general-purpose circuits are protected by 15-amp circuit breakers, making 14 AWG an appropriate choice to safely conduct electricity while minimizing the risk of overheating.

Using a wire size larger than necessary does not change the ability to safely conduct the load, but it may increase the cost and difficulty of installation. For circuits that require a higher load capacity, such as those serving larger appliances or equipment, a thicker wire (such as 12 AWG for 20-amp circuits) would be more suitable. However, when discussing standard lighting and receptacle circuits in a typical home environment, 14 AWG remains the minimum requirement per the National Electrical Code (NEC) and is specifically applicable in Alabama as well.