Light Switch Wiring Diagrams

This is an updated version of the first arrangement. Because the electrical code as of the 2011 NEC update requires a neutral wire in most new switch boxes, a 3-wire cable runs between the light and switch. The red and black are used for hot and the white neutral wire at the switch box allows for powering a timer, remote control, or other programmable switch.

With alternate light switch wiring, an NM cable supplies line voltage from the electrical panel to a light fixture outlet box. Another NM cable connects from the light fixture box to the switch box. In the diagram below right, a 2-wire NM cable that connects the light fixture to the switch carries 2 line wires (one line, and one switched line).

Installing additional electrical wiring for light switches should be done according to local and national electrical codes with a permit and be inspected. Wiring Switches Wiring Diagrams for Switches Single Switch Wiring Diagram 1 Single Switch Wiring Diagram 2 3 Way Switch Wiring Diagram 4 Way Switch Wiring Diagram Dimmer Switches

Wiring light switch is first step which learn by a electrician or electrical student. This connection is very simple connection and most used in electrical house wiring. This connection can be done by one way switch, a light bulb socket, light bulb and electric wires.

Need a Light Switch Wiring Diagram? Whether you have power coming in through the switch or from the lights, these switch wiring diagrams will show you the light. This light switch wiring diagram page will help you to master one of the most basic do it yourself projects around your house...

Switch Wiring Diagrams A single switch provides switching from one location only. “Single-Pole” may sound simple, but there are different ways to wire a Single-Pole Switch. The power can come from either the switch box or the fixture box and a set of electrical switch wiring diagrams will explain each of these scenarios to you clearly.

This is where you can control the same light via two switches. From here it is easy to modify the 2 way switch diagram to add an intermediate switch which allows you to control a light from 3 switches (or 4 or 5). If you are based in the U.S.A. please see: how to wire a light switch in the U.S.A.

Here is a wiring diagram for a light switch (four way light switch). It is possible that you may encounter a double pole light switch within the home, but these are not very common in a residential setting. These switches have four terminals as well, but the terminals are identified as “line” and “load”.

Wiring diagrams use simplified symbols to represent switches, lights, outlets, etc. Here is a standard wiring symbol legend showing a detailed documentation of common symbols that are used in wiring diagrams, home wiring plans, and electrical wiring blueprints.

Wiring a 3-Way Light Switch. Wiring a 3-way light switch is certainly more complicated than that of the more common single-pole switch, but you can figure it out if you follow our 3-way switch wiring diagram.. With a pair of 3-way switches, either can make or break the connection that completes the circuit to the light.