CAPACITY OF SINGLE-PHASE LINE 89 



Transferring to other units, 



T .4343 X 2.540 X 12 X 5280 



4 X 9 X iQ 11 



38.83 X io- 9 



2 



farads per mile of single-phase line. 

 The capacity susceptance is 



mhos per mile of single-phase line. The charging current 

 in this line will be 



where b is the tabulated value of capacity susceptance. 



REFERENCE. "A Treatise on the Theory of Alternating Currents," by 

 Alexander Russell, 1904, Vol. I, page 99. 



Capacity of Cable. The formula for capacity of a line 

 using stranded cables will be the same as the above formula 

 for solid wires, p being taken as the maximum radius of 

 the cable. All the electrostatic charge on the cable does 

 not lie at the maximum radius from the center, but as 

 actual cables are generally slightly larger than the calcu- 

 lated diameters in the tables, it will be sufficiently close to 

 take p from the tables and use it in the regular formula for 

 capacity. 



