The four way switch is a four terminal device. OK this doesn’t look like a four way switch. Both poles toggle when the relay coil is energized. Each pole has a common terminal that can be connected to one of that pole’s other two contacts.
There are two sets of switch es (or poles) in the relay. Here’s how a double pole double throw relay operates. So how do I make a relay replicate the function of a four way switch? Well, I use a double pole double throw relay. If you have lots of switch locations or if you want to do something fancy like switching based on a timer, motion detector, or some other concept, using a relay is the most straightforward way to make these applications possible. It is possible to add as many four-way switches to a multi way circuit as you wish. Because at all times one of the traveling pairs is always energized, changing the state of any switch in the circuit changes the state of the load. When the four way switch is toggled the traveling pairs downstream from that switch swap energization states. In multi way switching one or more four way switches are wired between the three way switches. Through this functionality, the same concept from three-way switching can be extended to multi way switching. Such a configuration is helpful because it allows the traveling pairs to be rolled. When the switch is toggled, the black terminals are swapped relative to the gold terminals. With the switch in one configuration, the black terminals are tied directly to the gold terminals. On the switch that I bought two of the terminals are black and two of the terminals are gold. A four-way switch works by swapping the connection s between the pairs of terminals. The addition of one four-way switches in the circuit give you additional locations from which you can switch the load. Either switch can be used to control the load. Depending on which traveler is connected the load will be either on or off. When the second switch is toggled, the energized traveler or t he unenergized traveler is switched onto the source side of the load. When the first switch is toggled the top traveler is energized. These wires allow the circuit to toggle when any switch is toggled. Traveling pairs are really the key to multi way switching. The two switches are connected together using travelers. The second switch is connected to the load. In a three way circuit, the first switch is connected to a source. When the switch is down the gold contact is connected to one black screw, and when the switch is up it’s connected to the other black screw. On the switches I bought one terminal is a gold screw and the other two are black screws. Three way switches are special switches with three terminals. If we want to perform switching at two locations however we need three way switches. When the circuit is open current can’t flow from the source to the load and light is turned off. When the switch is closed voltage from the source is presented to the load and establishes current flow this causes the light to illuminate.
In this video I’ll be talking about lighting loads but the concept is applicable to other types of loads. In simple switching, you have a single switch in line with the load. Let’s look at the details of how multiway switching works and maybe I’ll get a switch by the door in the not-so-distant future.įirst let’s consider how power makes it from a source to a load in a simple configuration. It would be really convenient if I could switch on the light from the back door instead of having to trip over stuff making my way to the switch. This is what’s known as three-way switching in the US. For instance in my garage, I can turn on and off the lights from the staircase and the door. Multiway switching is used when you want to be able to turn on or off a load such as a light from multiple locations.
#3 WAY SWITCH FREE#
Do you know how 3-way 4-way multiway switching works? Check out this post and video to see it broken down with animation and a free printable.
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