I just moved into a townhome and found one of the outlets had a 2 prong receptacle. I used to be an electrical apprentice and figured the swap would be easy, no sir! I get to the wiring and theres 2 hots and 3 reds (I dont want to call them neutral) and no ground w/ romex coming up thru the back bottom. Its an older home from the 50-60s. Im wondering how to wire up the new 15v 125a receptacle, if possible. Or would it be easier to get adapters, or call an electrician?
If you indeed have no ground in the box, the correct and code compliant action is to install a GFCI outlet, marked "no ground attached" (there should be stick-on labels in the box with the GFCI).
You could also replace it with a new 2-prong outlet. Under no condition should you use a normal 3-prong without connecting the ground or connecting the ground to neutral ("bootleg ground").