# How does a double pole switch work?

## How does a double pole switch work?

A double pole single throw switch controls two circuits (poles) and has 2 states an “on” (closed) state and an “off” (open) state. A double pole single throw has four terminals in total, two inputs and two outputs which are all controlled by the same switch.

Does it matter which way you wire a switch?

On a single pole, no it doesn’t matter but usually you would have a white for the hot and a black for the switchleg unless there’s a hot connection in the box. When the hot comes from a ceiling box a white is used to feed the switch normally if using romex or armored cable.

### How is a double pole switch wired?

You wire a double-pole switch in essentially the same way as a single-pole one, but it’s important to remember to keep the red wires on one side of the switch and the black wires on the other. If you mix them up, the switch won’t work and could be dangerous.

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How do you test if a switch is working?

Touch each tester probe to one of the screw terminals, then turn the switch lever on and off. If the switch is good, the tester will read close to zero when the switch lever is in the on position, indicating that there is perfect continuity (no resistance).

#### Should a switch be on the positive or negative side?

Technically, either way will work, although it’s more common to put the switch in the positive power lead. The reason is that components often have more than one path to ground, so putting a switch in the “primary” ground wire might not completely isolate the accessory from ground.

What is the difference between single pole and double pole switches?

Single pole switches can control just one circuit and a double pole switch can control two circuits. So a double pole switch is almost like having two single pole switches, controlled by the same switch. What Are Single Pole Switches? Single pole switches are common, simple light switches.

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## How does a double pole double throw switch work?

Each of the terminals of a double pole double switch can either be in 1 of 2 positions. This makes the the double pole double throw switch a very versatile switch. With 2 inputs, it can connect to 4 different outputs. It can reroute a circuit into 2 different modes of operation.

What is the purpose of a double pole socket?

A double pole socket switches both the live and neutral to ensure safe isolation of the plugged in appliance. How does a double pole switch work? A double pole switch switches both the live and neutral to ensure safe isolation of the load circuit. How many wires can be on a single pole switch?

### What size double pole switch do I need for my oven?

A 20A double pole switch is likely to be only suitable for small ovens, whereas regular ovens are likely to need a 45A DP switch. Another reason to use a double pole switch is due to regulations that mean you need to have local means of isolation for certain products.