56 



SUBMARINE CABLE LAYING AND KEPAIRING. 



= 65 mils. 



and each wire of the strand would be 

 195 

 3 



That would mean a 7/16 conductor, but on a large size like this 

 it is better to put in a 12-strand to utilise more of the available 



610 



600 



590 



580 



570 



560 



550 

 *; 510 

 1 530 

 % 520 

 I 510 

 g 500 

 (§ 490 

 •i 480 

 I 470 

 1 460 

 € 450 



.&430 

 ^ 420 



410 



400 



390 



380 



370 



360 



350 



0-6 



1-5 



Fig 

 Batio 



0-7 0-8 0-9 rO 1-1 1-2 1-3 1-4 

 Ratios of Weights of Copper to Gutta-Percha. 



, 30. — Curve D, showing Relation between Weight of Conductor and 

 of "Weights of Conductor and Insulator for a kr of 0'S65 at 40°F. 



area and to give more flexibility. The resistance would be, by 

 formula (14), 



^4^ = 2-03 ohms per naut at 40°F., 



548 



and each wire of the strand would be 



2*03 



— = 24*1 ohms per naut, 



0-08435 ^ 



