There are six screws holding the panel on. There are a few items required to install a new outlet, all of which are readily available at the Home Depot or any similar store. The voltage between the left and right terminals should be Details are outside the scope of this article. However, if you are wiring according to the current national electric code, then you may be required to use arc-fault-circuit-interrupter breakers.
Adding a 220 Outlet
With everything shut off, I removed the six screws holding the cover on.
The point here is that an electrician will treat the white wire as neutral and therefore safe. The voltage between the neutral and ground terminal should be 0. I wired a table saw with the v plug.