Standard Wiring Diagram Symbols. An extensive collection of electrical diagram templates can be found in the electrical engineering category. Note the switch symbol displays an open or closed circuit path which is what an actual switch performs.
The standardized wiring diagram symbols chart has been updated recently to reflect recent additions of semiconductor components including the solid state diode and transistors. 1 master element 2 time delay starting or closing relay 3 checking or interlocking relay 4 master contactor 5 stopping device 6 starting circuit breaker 7 rate of change relay 8 control power disconnecting device 9 reversing device 10 unit. Graphic symbols are correlated with parts lists descriptions or instructions by means of device designations.
Here is the wiring symbol legend which is a detailed documentation of common symbols that are used in wiring diagrams home wiring plans and electrical wiring blueprints.
Electrical symbols switches and relays. Retma color code chart. Due to the number of variants used there may have several symbols in this reference chart for the same type of equipment these can vary dependent upon drawing package used. Electrical schematic symbols chart pdf panel wiring how to the standard circuit component symbols and circuit symbols are important for circuit schematic diagrams.