CHAPTER VII. DISTRIBUTION OF ALTERNATING-CURRENT DENSITY 

IN CONDUCTOR. 369 

59. Cause and effect of unequal current distribution. In- 

dustrial importance. 369 

60. Subdivision and stranding. Flat conductor and large 

conductor. 371 


CONTENTS. xxi 

PAGE 

61. The differential equations of alternating-current distri- 

bution in a flat conductor. 374 

62. Their integral equations. 375 

63. Mean value of current, and effective resistance. 376 

64. Equations for large conductors. 377 

65. Effective resistance and depth of penetration. 379 

66. Depth of penetration, or conducting layer, for different 

materials and different frequencies, and maximum 
economical conductor diameter. 384