<Li> Twin - lead--This type of cable is a flat two - wire line . It is commonly called a 300 Ω line because the line has an impedance of 300 Ω . It is often used as a transmission line between an antenna and a receiver (e.g., TV and radio). These cables are stranded to lower skin effects . </Li> <Li> Twisted pair--Consists of two interwound insulated wires . It resembles a paired cable, except that the paired wires are twisted </Li> <P> CENELEC HD 361 is a ratified standard published by CENELEC, which relates to wire and cable marking type, whose goal is to harmonize cables . Deutsches Institut für Normung (DIN, VDE) has released a similar standard (DIN VDE 0292). </P> <P> Hybrid optical and electrical cables can be used in wireless outdoor fiber - to - the - antenna (FTTA) applications . In these cables, the optical fibers carry information, and the electrical conductors are used to transmit power . These cables can be placed in several environments to serve antenna mounted on poles, towers or other structures . Local safety regulations may apply . </P>

Different type of electrical cables and their specifications