Lesson 4/Learning Event 1
Wiring assemblies consist of wires and cables of definitely prescribed length, assembled together to
form a subassembly that will interconnect specific electrical components and/or equipment. There
are two basic types of wiring assemblies:
FIGURE 29. WIRING HARNESSES.
The cable assembly consists of a stranded conductor with insulation or a combination of insulated
conductors enclosed in a covering or jacket from end to end. Terminating connections seal around
the outer jacket so that the inner conductors are isolated completely from the environment
experienced by the outer jacket. Cable assemblies may have two or more ends.
Wiring harness assemblies contain two or more individual conductors laid parallel or twisted
together and wrapped with binding materials such as tape, lacing cord, and wiring ties. The binding
materials do not isolate the conductors from the environment completely, and conductor
terminations may or may not be sealed. Wiring harnesses also may have two or more ends.