OP EN -WIRE CROSSTALK 



205 



wires, one wire is raised about 3/4 inch and the other lowered this 

 amount at the transposition point. The drop bracket transposition 



Fig. 21 — Point-type transposition. 



illustrated by Fig. 22 is considerably cheaper but the displacement of 

 the wires is much greater. The effect of this displacement is important 

 and must be especially considered in transposition design. 



If all the spans adjacent to a drop bracket were of the same length 



O© 



Fig. 22 — Drop-bracket transposition. 



