Figure 8 Cable is an aerial cable construction in which the communication conductors and an integrated steel support strand are jacketed together so that the cross section resembles the shape of the number eight.
Figure 8 Cable is a specialized aerial cable design used in commercial and industrial communication infrastructure. Its defining characteristic is the integration of two parallel components within a single outer jacket. One portion of the cable contains the signal carrying conductors or fiber elements, while the other portion contains a steel messenger strand. When viewed in cross section, the combined profile resembles the numeral eight, which gives the cable its name.
The steel messenger strand serves as a structural support member. In aerial applications, the messenger bears the mechanical load of the span between poles or structural attachment points. This allows the communication portion of the cable to remain properly tensioned without being subjected to excessive mechanical stress. The integration of both elements within a unified jacket simplifies aerial deployment and maintains consistent spacing between the support strand and the signal conductors.
Figure 8 constructions are commonly used for outside plant communication systems in commercial and institutional environments. These may include campus networks, municipal infrastructure, transportation systems, industrial facilities, and utility communication pathways. The messenger strand is typically made of galvanized steel to provide tensile strength and environmental durability in outdoor conditions.
The communication portion of a Figure 8 Cable may contain copper conductors or fiber optic elements, depending on the application. In fiber based versions, the optical fibers are protected within buffer tubes or central strength members, while the messenger strand provides aerial support. In copper versions, twisted pair or coaxial conductors are integrated alongside the messenger.
This construction is engineered to withstand wind loading, environmental exposure, and long span distances in commercial and industrial settings. The combined jacket design ensures that both structural and transmission elements remain aligned and protected.
Understanding Figure 8 Cable is important when evaluating aerial communication infrastructure. Its distinctive profile reflects a design that balances mechanical strength with reliable signal transmission across elevated spans in demanding commercial environments.