I want to add power outlets to a side of my garage that currently has none but am struggling to find wiring diagrams for a 240v switch that will be connected to an outlet. Is it as easy as 2 hots connected to the bottom two screws of a double pole switch and then 2 hots out of the top two screws with a ground wire attached? I just haven't had any luck finding anything to confirm this.
My garage functions as both a hobby space and where my kids store their bikes, scooters, etc. I want to wire switches upstream of the outlets so I can keep my tools plugged in and not be concerned about a child messing around and accidentally turning a tool on.
Best Answer
To switch 240v there are 2 methods. Cheap method single pole switch break 1 hot that’s it. the circuit is still live 120v could be measured to ground but a 240v device will be turned off. I have seen this used extensively on heating circuits. I have also found this in older tools like radial arm saws, and table saws that were multi voltage. The down side the tool has 120v potential to ground when off. Advantage it’s cheaper.
Today The more common way is to use a double pole switch and break both hot legs. This kills all power going to the tool It cost a bit more. Is considered safer because no power to the tool but a 240v device doesn't care. Which method is used.
If you want to use standard snap switches on motors if not motor rated a switch with 2x the current requirement is needed.
For general loads ( other than motors) the switch only needs to be rated for the load.