3 way wire diagram

18.10.2018 2 Comments

Electronic remote switching[ edit ] Further information: Toggling any switch changes the state of the load from off to on, or from on to off. An intermediate switch can, however, be implemented by adding appropriate external wiring to an ordinary six terminal DPDT switch, or by using a separate DPDT relay. After an initial burst of popularity in the s, residential use of such relay-based low voltage systems has become rare.

3 way wire diagram


Four sample arrangements Low voltage relay switching[ edit ] Systems based on relays with low-voltage control circuits permit switching the power to lighting loads from an arbitrary number of locations. An intermediate switch can, however, be implemented by adding appropriate external wiring to an ordinary six terminal DPDT switch, or by using a separate DPDT relay. Expert Advice from Start to Finish revised ed. Three-way and four-way switches[ edit ] A double pole, double throw switch wired to act as a four-way intermediate or crossover switch This article follows American usage. More than two locations[ edit ] For more than two locations, two of the interconnecting wires must be passed through an intermediate switch, wired to swap or transpose the pair. This wiring system may still be encountered in older "grandfathered" electrical installations. Home Improvement Stack Exchange. Traveler system[ edit ] Using three switches, there are eight possible permutations of switch positions: Instead of running mains voltage to the switches, a low voltage—typically 24 V AC—is connected to remote momentary toggle or rocker switches. An optional additional lamp can be connected at Terminal A as a pilot lamp, or to illuminate a long corridor. The major problem with this method is that in one of the four switch combinations the socket around the bulb is electrified at both of its terminals even though the bulb is not lit. Remote-control systems are increasingly used in commercial buildings as part of lighting systems under semi-automatic control, for better safety, security, and energy conservation. Traveler system[ edit ] In the traveler system, also called the "common" system, the power line hot, shown in red is fed into the common terminal of one of the switches; the switches are then connected to each other by a pair of wires called "travelers" or "strappers" in the UK , and the lamp is connected to the common line of the second switch, as shown. Any number of intermediate switches can be inserted, allowing for any number of locations. The switches may be arranged so that they are in the same orientation for off, and contrasting orientations for on. For each load, a latching relay is used that mechanically maintains its on- or off-state, even if power to the building is interrupted. An optional receptacle can be connected at Terminal B, since that terminal is always live. An alternative system, known as the "California 3-way", or "coast 3-way" connection system allows both switched and unswitched loads to be connected near both switches without running too many additional wires. Electrically, a typical "3-way" switch is a single pole, double throw SPDT switch. An optional master control can be added that turns all lights in the facility on or off simultaneously under the control of a timer or computer. By connecting one or more 4-way intermediate switches in-line, with 3-way switches at either end, the load can be controlled from three or more locations. Toggling the switch disconnects one "traveler" terminal and connects the other. Day, Richard January Electronic remote switching[ edit ] Further information: This switch has two pairs of "traveler" terminals that it connects either straight through, or crossed over transposed, or swapped. Off On As mentioned above, the above circuit can be extended by using multiple 4-way switches between the 3-way switches to extend switching ability to any number of locations. If both switches were flipped to hot or both were flipped to neutral, the light would remain off; but if they were switched to opposite positions, the light would illuminate.

3 way wire diagram


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2 thoughts on “3 way wire diagram”

  1. Instead of running mains voltage to the switches, a low voltage—typically 24 V AC—is connected to remote momentary toggle or rocker switches. Toggling any switch changes the state of the load from off to on, or from on to off.

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