72 



BELL SYSTEM TECHNICAL JOURNAL 



Cable Make-Up 



As stated before, the make-up of the cable varies somewhat with 

 the circuit requirements in the different sections but the wires and 

 arrangement in a typical section of cable are roughly illustrated in 

 Fig. 13. 



Fig. 13 Piece ot I able with Sheath Partly Removed 



The cable is of quadded construction, that is, the wires are first 

 wrapped with dry paper for insulation and twisted into pairs and then 

 two pairs are twisted into what is called a quad. These quads are 



