CABLE DESIGN AND MANUFACTURE 



201 



Fig. 5 — Special water tank or pan for tests on immersed cable core. 



of the unit-length capacitance of the core obtained during extrusion were 

 used as a guide in searching out regions of uncertainty. 



PANNING AND TESTING 



After runover, the core was coiled in tanks of water, as shown in Fig. 5. 

 Precautions were taken to remove the air dissolved in the water and thus 

 prevent the formation of bubbles on the surface of the core. The water 

 was also temperature controlled and circulated to maintain uniform 

 temperature throughout the tank. Thermocouples placed at different 

 levels in the tank determined when the temperature was uniform. 

 Measurements of dc conductor resistance, ac capacitance, insulation re- 



