220 wiring question for saw & dust collector

Agreed. I put a 240 v 30 amp plug into my garage, and I researched the topic of '3' vs '2'. The Elecrical code in Alberta, Canada, requires

3+ground for dryers, otherwise '2' is fine and meets code. Since my garage is no place for a dryer, the 2+ground is fine. My electrical inspector agreed. However for a dryer, remember the extra neutral, since even a functional older machine will be replaced when people move. An outdated dryer plug may be hard to upgrade after the drywall is in, so the code requires the extra wire for dryers. I don't know of many shop tools that require the 120/240 option. For my shop, it would be easy to pull extra wire through the conduit, and the run is only 7 feet. If thr run were more complex, I might have brought in the three-wire cable, just to give more versatility later.

Dave