For example a long hallway or stairway might use a pair of three way switches at each end so that lights can be turned on when approaching one end of the hall or stairway then shut off from the other end. A three way light switch is different than a traditional single pole light switch as it contains an extra screw to connect an extra wire.
3 Way Lamp Wikipedia
What is a 3 way switch on a lamp. A 3 way lamp requires a 3 way bulb and socket and a 3 way switch. The next most common is the three way switch which is commonly used to control a light fixture from two different locations. This is the same arrangement as the second diagram on this page with a fan in place of the light fixture. A light or lights can be controlled by more than one switch. A 3 way lamp also known as a tri light is a lamp that uses a 3 way light bulb to produce three levels of light in a low medium high configuration. In this wiring the source is at sw1 and 3 wire cable runs between each switch and the ceiling fan.
This is known as the common screw and its usually black instead of brass or silver. The usual practice in home construction is to use 3 way switches. Unlike an incandescent lamp controlled by a dimmer each of the filaments operates at full voltage so the color of the light does not change between the three steps of light. 3 way is the electricians designation for a single pole double throw spdt switch. A 3 way switch is shown below. Add an electrical box for the second 3 way switch in the basement.
Directions for wiring a 3 way light switch yourself. Electrical ac dc two 3 way switches to lamp hi i have renovated my kitchen and i had carefully labeled and taken pictures of the switches in my kitchen then placed them as a backup on my. Slide your mouse over it to see it change state requires javascript enabled. Ceiling fan 3 way switch wiring. A 3 way lamp requires a 3 way bulb and socket and a 3 way 2 circuit switch. Turn off the correct circuit at your electrical panel.
This configuration may be used in open plan homes or in large kitchens or great rooms where a central bank of lighting fixtures might be controlled from more than two entry points. Another dead giveaway of a three way switch is the absence of on and off markings. Here a ceiling fan with a light kit is controlled with two 3 way switches. A third type is the four way switch which is used in conjunction with two three way switches to control lighting from more than two locations. Unlike a lamp controlled by a dimmer each of the filaments operates at full voltage and the normal temperature for an incandescent bulb so the color of the light does not change over the three steps of light available. The three way switch is a variation of the standard single pole switch which controls a light only from one location.
Its likely youll also need to replace the existing switch box with a larger one to accommodate the extra wires for.
Gallery of What Is A 3 Way Switch On A Lamp
