Figure 7-12. - Standard wiring diagram symbol - Continued.

The control-circuit line diagram of figure 7-13 shows the symbol of each device used in the circuit and indicates its function. The push-button station wiring diagram on the right of figure 7-13 represents the physical control station and shows the relative position of each device, the internal wiring, and the connections with the motor starter.

Control and Power Connections

The correct connections and component locations for line and wiring diagrams are shown in table 7-1. Compare the information given in the table with actual

line diagrams to develop the ability to interpret the table quickly and use it correctly; for example, refer to figure 7-14 and the three-phase column of table 7-1. Note that the control circuit switching is connected to line 1 (L1) and the contactor coil is connected to line 2 (L2)

Control Wiring

Control wiring can be very confusing. A single operation of an electrical circuit is usually not complicated; however, a sequence of operations, one depending on the other, in a complex circuit can be