ALTERNATING-CURRENT WINDING 



233 



connectors to lie up, the bottom conductor must be connected 

 in the opposite direction to the top on emerging from the 

 armature. 



At the other end of the diagram the top conductors are 

 connected to the right, and hence the bottom conductors must be 



FIG. 273. Elementary Single-phase, Uni-slot, Retrogressive Wave Winding, 

 Two Conductors per Slot. 



connected to the left, and thus conductor 14 is connected to 11, 

 and so on round the armature, arriving at 15 after having made a 

 complete tour in the opposite direction to that taken previously, 

 the ends being marked C and D. An inspection of the arrow- 

 heads on the conductors, which indicate the direction of the 

 electromotive forces, will show that, to connect these two circuits 

 together so that the E.M.F.'s are in the same direction throughout 

 the winding, either points B and C must be connected together, 



