Understanding Electrical Control Circuit Diagrams. Fied representation of a circuit showing only the most significant elements. A line diagram is used to show the relationship between circuits and their components but not the actual location of the components.
Wiring diagrams panel wiring diagrams control wiring diagrams provide a road map of the connections between circuit breakers and other devices disconnectors cts vts etc to facilitate assembly debugging and testing. Symbols used on single line one line diagrams on schematic or elementary diagrams or as applicable on connection or wiring diagrams. Graphic symbols are correlated with parts lists descriptions or instructions by means of device designations.
Figure 1a for example shows both a normally open and a nor mally closed single pole single throw spst switch.
The example below shows a ladder diagram with pushbuttons pb control relays cr a motor m and a light l. The common number designates a condition of electrical commonality all points bearing the same number are equipotential to each other. Transformers generators circuit breakers fuse air break switches reactors capacitors instrument transformers and other electrical equipment. The ground path back to battery negative marked.