Which type of cable is classified under electrical wiring methods?

The classification of electrical wiring methods includes various types of physical materials designed for electrical installation, and non-metallic sheathed cable as well as armored cable are both recognized categories under this classification. Non-metallic sheathed cable, commonly known as NM cable or Romex, is used extensively for residential wiring due to its flexibility and ease of installation. Armored cable, also known as AC or BX cable, is designed for enhanced protection of the internal conductors and is often used in environments where physical damage might occur.

These cable types meet specific requirements outlined in electrical codes and standards, making them suitable for various wiring applications. In contrast, underground and surface-mounted wiring options are not specific types of cable; instead, they refer more to the installation or application methods of electrical wiring. Wireless technologies, on the other hand, do not fall under the category of traditional electrical wiring methods since they operate without physical cables.