212 BELL SYSTEM TECHNICAL JOURNAL 



capacity and type of the motor generator set were determined from 

 the sizes and lengths of cables to be dried, balancing the first cost and 

 efficiency against loss of capacity when handling some cables requiring 



Fig. 2 — CoiUrol panel for starting motor generator set and controlling the 

 drying operation. 



a longer heating period. This latter might be due to too large a cable 

 or too long a length to be heated at the standard rate. In determining 

 the capacity for a fixed starting current density, consideration .was 

 given to the cost of equipment, length of heating period and general 



