STATION WIRING 



643 



TABLE LX 



APPROXIMATE REACTANCE AND IMPEDANCE OP THREE CONDUCTOR CABLES 



PER MILE 

 60 CYCLES 



A The three-phase reactance of a cable 1 mile long. 



B The three-phase impedance of a cable 1 mile long. 



NOTE. Of the two figures given for the insulation for example 5/32 by 5/32 

 one is the insulation thickness around each conductor and the other the thickness of 

 the insulation belt around the three conductors. The former only is of importance 

 as far as the reactance value is concerned as it determines the distance between the 

 conductors. 



