The most common use of a double pole switch in lighting is the 4 way double pole double throw switch it is wired between two 3 way single pole double throw switches the other and less common use is a double pole single throw switch that can switch both phases to a 220 volt light. 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. A double pole switch isnt difficult to install if you have a basic understanding of electricity and how it works there are two types of switches a single pole which controls only one circuit and a double pole that controls two circuits controlled by one button lever or knob. The difference between a single and double pole switch is that the latter controls two circuits at the same time a double pole switch is what you need to control a 240 volt device because 240 volt circuits have two hot wires it has four terminals two for incoming hots and two for outgoing hots. How to install a double pole toggle switch commercial duration 1149 detailed diy wiring a 240v outlet step by step from breaker to how to wire a double switch combination two
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