What size range do copper conductors in nonmetallic-sheathed cable typically cover?

Copper conductors in nonmetallic-sheathed cable, commonly known as NM cable or Romex, typically cover a size range of 14 AWG to 2 AWG. This range is widely used in residential and light commercial wiring applications, making it suitable for circuits such as lighting, receptacles, and small appliances.

The 14 AWG size is often used for general-purpose circuits, while the 2 AWG size can be utilized for larger circuits requiring higher current capacities. This flexibility allows electricians to select the appropriate conductor size based on the specific electrical load and installation requirements.

Understanding the proper size range is crucial for ensuring safety, efficiency, and compliance with local electrical codes when planning and executing electrical installations. This knowledge directly impacts the performance of the electrical system and helps prevent issues such as overheating or electrical failures due to undersized conductors.