CAPACITY OF TWO-PHASE AND THREE-PHASE LINES 97 



38.83 X 2 TT/E 



= 2 >2 ^__ x icr 9 per mile 



logio- 

 p 

 = Eb, 



where b is the tabulated value of capacity susceptance per 

 mile. 



Capacity, Three-phase, Regular Spacing. When the 

 conductors are placed an equal distance, s, from each other, 

 the formula for b is 



, 38.83 X 27T/ V> ., 



I = 2 2 - J. x 10 9 mhos per mile. 



logio- 

 P 



Capacity, Three-phase, Flat Spacing. When the wires 

 lie in one plane (either horizontal or vertical), the certer 

 one being at a distance a from the other two (see Fig. 18), 

 and the wires being transposed at regular intervals, the 

 formula for susceptance is 



38.83 X2X/" _ 



, 

 logio 



P 



mhos per mile of transmission line. 



