The following table provides the commonly used electrical wiring schematic symbols for connectors which comply with the IEC and BS Electrical Symbols. These connectors include plug and socket, coaxial, terminal and earth connectors.
Plug Male
Socket (plug female)
Coax Plug Male
Slow Operating Relay - Delay On
Wire Connections (Two Wires)
Wire Connections (crossed)
Wires Crossing (Not Connected)
Terminal Connector
Terminal Block
Earth Connection
Noiseless Earth
Protective Earth
Chassis Earth