While a "normal" light switch needs to be only a Single Pole, Single Throw (SPST) switch, multiway switching requires the use of switches that have one or more additional contacts and two or more wires must be run between the switches.
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These switches appear externally similar to Single Pole, Single Throw (SPST) switches, but have extra connections which allow a circuit to be controlled from multiple locations.
Saint Paul School of Theology, a school of higher learning in Kansas City, Missouri, United States
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