STATION WIRING 



TABLE LV 

 CLASSIFICATION OF CONDITIONS X, Y, AND Z 



637 



Single-conductor lead-covered cables above 600,000 C.M., 

 25 cycles and 3/0,60 cycles, should only be used after special con- 

 sideration is given to the lead-sheath current, and multiplied 

 single-conductor cables on 60-cycle circuits shall be suitably 

 arranged to eliminate initial induction and thus balance the 

 reactance and apportion the current carried in each conductor. 



For secondary instrument current wiring, where the watts 

 loss in the secondary leads must be kept within certain limits, 



