1, distribution box to light, LNPE three.
2, lights to the switch. A N into the line, appear to see how many poles when the switch, a few poles on the addition of a few, such as lights to the secondary switch, then the lights and the switch is between the three wires. That is, an incoming line, two outgoing line *** three.
3, a switch-controlled lights to another switch-controlled lights, LNPE three wires.
Expanded Information:
Electrical system diagrams are mainly electrical schematic diagrams, electrical layout diagrams, electrical installation wiring diagrams, etc., drawing software has electrical CAD, protel99, Cadence, etc..
Therefore, the electrical schematic diagram is a kind of electrical system diagram. It is drawn according to the working principle of the control line diagram, with a simple structure and clear hierarchy. Mainly used to study and analyze the working principle of the circuit.
Electrical layout and installation diagram is mainly used to show the various electrical equipment in mechanical equipment and electrical control cabinet in the actual installation location. For mechanical and electrical in the control equipment manufacturing, installation, maintenance, repair and provide the necessary information.
Electrical installation wiring diagram is to carry out devices, equipment or complete sets of wiring to provide detailed information on the electrical connection between the various installation wiring diagram items, including the connection relationship, cable types and laying lines.
Baidu Encyclopedia - Electrical Schematic Diagrams