Chapter 8. 100-Ohm Balanced Twisted-Pair Cabling

This Chapter uses the TIA/EIA nomenclature for twisted-pair cabling. TIA/EIA-568-B ^[70], ^[71], ^[72] calls out both unshielded and screened versions of 100-Ω balanced twisted-pair cabling.

Unshielded 100-Ω twisted-pair cabling (UTP) is composed of a number of balanced, twisted pairs. Each pair of conductors is wound tightly together. As defined for horizontal building wiring (see Chapter 7), UTP contains four pairs, for a total count of four or eight conductors respectively. Typical construction for four-pair UTP appears in Figure 8.1.