I am exploring options for adding a welder outlet to my garage and would appreciate any advice you might have.
My garage panel has no open breaker slots and is set up with only one 230V/20a circuit that is hardwired to the mini-split AC unit. I was wondering if it is safe/legal to run a line from that breaker to a SPDT (on-off-on) switch that could be used to select between the existing AC circuit OR a new 20a welder outlet, but never both at the same time.
Here is the switch:
The welder (Lincoln 210MP) shows a draw of 14.7 amps, so a 20a breaker should be OK.
All wiring would be matched 12-2 and the current 20a breaker protection would be maintained.