How to wire and install single pole switches updated 02 10 20 donnichols getty images 01 of 06 single pole switch wiring single pole switches are the most common light switches in a home the ground screw is for the circuit ground wire connection standard single pole switches do not connect to neutral circuit wire supplies . 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. A 2 wire switch leg is pulled from the switch to the nearest lightbelow is a line diagram and a wiring schematic of a basic single pole switch wiring circuit line diagrams help electricians figure out how to make wiring connections by simplifying the circuit they are drawn with the hot on the left and the neutral on the right. Which method is best for switching the neutral 3 pole transfer switches with overlapping neutral contacts or 4 pole switches the answer may surprise you you want to preserve the integrity of your ground fault protection system without compromise so what do you do when it comes to switching the neutral among many benefits youve heard 3 pole transfer switches with overlapping neutral contacts. The other day a manufacturer inquired about switching the neutral in a branch circuit and whether the 2011 national electrical code nec would permit a switched neutral for any application within the code my first reaction was no and then i thought about the differences between neutrals and grounded conductors i also had thoughts about overload protection in motor circuits and control
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