The floor sander left this at a job site. It's pretty safe by flooring company standards. :roll: It's a 30 amp dryer cord with a 20 amp/250 volt twistlock. They actually wired the twistlock correctly and used black and red for hot and green wire for the ground. I guess they never have to worry about the breaker tripping.
Bonus: can you spot something else that's wrong with this setup?
-Peter (CTwireman)
Bob Badger Construction & Maintenance Electrician Massachusetts