Figure 7-12.Standard wiring diagram symbolContinued.
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.
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
Control and Power Connections
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
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