Figure 2-14.Block diagram.
Figure 2-15.Wiring diagram.
The wiring diagram is almost a picture drawing. It
shows the wiring between components and the relative
position of the components. Figure 2-15 shows a wiring
diagram of the same motor control system represented
by the block diagram in figure 2-14. In the wiring
diagram, components are shown much as they would
appear in a picture. The lines representing wires are
marked with numbers or letter-number combinations.
Lines L1, L2, and L3 are incoming power leads. The
diagram shows which terminals these power leads are
connected to in the motor starter. Leads connected to
terminals T1, T2, and T3 are the motor leads.
The numbers without letters mark the control
terminals of the starter. Wiring diagrams are often used
along with a list of repair parts. Wiring diagrams may
be of some help in troubleshooting circuit problems.
Figure 2-16 is a connection diagram. By comparing
the symbols from this diagram to those in figure 2-6,
you can see that graphic symbols are used to represent
parts or components in the connection diagram. The
connection diagram in figure 2-16 is a combination of
basic symbols (like the open-contact symbol). You can
see how the controller pictured in figure 2-15 works
Figure 2-16.Connection diagram.