The majority of the symbols on this Electrical Outlet Wiring Diagram appear to be abstract representations of the real objects they represent. A switch, for example, will be a break in line with a line at an angle to the wire, very similar to a light switch that can be turned on and off. A resistor is represented by a series of squiggles symbolizing the current flow restriction. Like a real antenna, an antenna is a straight line with three small lines branching off at its end. This example of an Electrical Outlet Wiring Diagram is the best way to understand wiring diagrams.