# Best answer: Can you use a 120V AC switch for 12V DC?

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## Can you use AC switches for DC?

Yes, an AC switch should be fine to control a few milliamperes of a relay coil. The relay is designed to switch high DC currents.

## Is there a difference between an AC switch and a DC switch?

With dc, you’ve got a steady current in one direction, whereas with ac, both the magnitude and direction of the current change. … When you switch off power to an ac circuit, a voltage spark (or arc) is created inside the switch that’s quickly extinguished—a desirable condition.

## Are switches rated for AC or DC?

The first thing you need to know is that light switches are rated based on the electrical current type. For example, the two most common types of lighting switches are DC (direct current) and AC (alternating current).

## Can I use 110v wire for 12V?

That’s a no-no. Break the Positive wire across the light switch and return the Negative wire to the negative side of the 12V source. Most modern dimmer switches don’t work on 12V.

## Can you use a 120V switch for 24V?

the only reasion the 120V switch will not work on your 24V switching is if the switch has the relay on the back.

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## How many amps can a switch handle?

Most residential switches are rated at 15 amps, whereas industrial and residential switches usually are rated at 20 amps.

## Does the voltage of a switch matter?

In short: The voltage rating is the specified maximum voltage it can safely switch. (Higher voltages require larger contact separation.) The current rating is the maximum current it can handle.

## How many amps does an AC switch need?

Do You Have The Best Window AC? Most common voltage ratings for AC units are 115, 125 and 220 volts, and amperage rating can run from 15 to 20 amps. The lower two voltage ratings are common in smaller units, while units with a rating higher than 15,000 BTUs will require a 220-volt circuit.