What type of wiring is typically used for residential service entrance?

The correct response highlights that both armored cable and non-metallic sheathed cable are commonly utilized for residential service entrance wiring.

Armored cable, often referred to as AC or BX, provides robust protection against physical damage, making it suitable for situations where wiring is exposed or where it could be subjected to mechanical stress. Its metallic sheath also serves to contain any potential electromagnetic interference, ensuring that the electrical system operates safely and effectively.

Non-metallic sheathed cable, commonly known as NM or Romex, is widely used in residential applications for its ease of installation and flexibility. This type of wiring is insulated and designed for indoor use, allowing for efficient wiring in walls and ceilings without the added bulk of metal sheathing.

Both types of cables meet code requirements for safely carrying electricity from the service entrance to the rest of the home, providing the necessary protection and electrical performance. Thus, recognizing that either option can be appropriate is crucial for understanding residential electrical installations.