On Wednesday, December 2, 2020 at 10:20:15 PM UTC-5, Hawk wrote:
On 12/2/2020 5:04 PM, Thomas wrote:
Bought a sous vide 800 watt cooker. Can I safely use in a 2 slot outlet?
15 amp service, older house, maybe from 1965 or so.

With an adapter, you can.

Not with a 3 prong to 2 prong adapter if there is no ground at the receptacle cover screw.
Even then it's iffy. Put in a GFCI receptacle in the most upstream location possible.