Which arrangement is included in the definition of cable used in aircraft electrical installations?

• A. Two or more insulated conductors twisted together
• B. A single insulated conductor
• C. A conductor with no insulation
• D. A conductor with a bare shield

Answer: (A)

In aircraft electrical installations, a cable is defined by being a group of two or more insulated conductors laid up together. This arrangement allows multiple circuits to be carried in a single, protected, and routable assembly while keeping each conductor insulated from the others. A single insulated conductor is simply a wire, not a cable. A conductor with no insulation is a bare conductor, which isn’t considered a cable. A conductor with a bare shield describes a shielded conductor, which is a different kind of assembly; the defining feature of cable here is the presence of multiple insulated conductors grouped together.