Inspection Certification Associates (ICA) School Test 2025 – 400 Free Practice Questions to Pass the Exam

Romex is a brand name commonly used to refer to non-metallic sheathed cable, which is classified as NM cable. This type of electrical cable is widely used in residential wiring due to its ease of installation and safety features. Non-metallic sheathing protects the individual wires inside from damage and moisture, making it suitable for various environments within homes.

NM cable typically contains two or more insulated conductors and a bare ground wire, all enclosed in a flexible plastic sheath. This construction makes it lighter and easier to work with than other types of cables, especially in situations where a conduit isn't required. It is also cost-effective, which contributes to its popularity among electricians and builders.

The other options refer to different types of cable. AC (Alternating Current) cable, also known as armored cable, is different because it has a metal armor that provides physical protection. BX, or flexible metal conduit, is another type of armored cable but does not have the same applications as NM cable. EMT (Electrical Metallic Tubing) is a type of metal conduit used for running electrical wires but does not consist of sheathed cable like NM.

Understanding these distinctions clarifies why NM is the correct answer to this question regarding Romex.