14 ALTERNATING GENERATORS AND SYNCHRONOUS MOTORS. 
3Z xX C,=100,000; and the phase current being 81 amperes, 
100,000 
81 
= 1240, or the nearest multiple of the slot number, 96x13 
= 1248, which gives 13 conductors per slot. 
the number of total armature conductors will be 
456. Size of Conductors.—With 13 conductors per slot and 
81 amperes per phase, the slot capacity will have the 
standard value of 13x 81=1,053 ampere conductors; and 
allowing a current density of 2,000 amps. per square inch, 
the application of 2 parallel connected No. 8, S.W.G. wires 
per conductor, results in a favorable slot shape. 
45%. Dimensions of Slots.—The slot dimensions Fig. 96 are 
equal to s=0.75 inches in width and 7=2.1 inches in depth, 
270" 
Ss 4 5 
CULL _* 
Fic. 96.—SLot WINDING OF 550 H. P., 3460 Voit, SyNcHRONOUS 
3-PHASE Moror. 
which provides amply for the total number of 26 wires with 
double cotton covering, for the 0.08 inch thick micanite 
insulation. and for the unevenness of the assembled stamp- 
ings, and also a fixing wedge 0.2 inch in thickness. 
458. Diameter of Magnet Wheel.—tThe total value of 
armature ampere conductors being 1248 x 81=101,000 with 
a peripheral density of 500 ampere conductors per inch, © 
101,000 = 64.5 inches, 
the armature diameter is equal to 500x314 
see Equation (37). 
