110 vs 220 outlet. You asked what the difference is between 110 and 220 volts but i think what you really want to know is why a home is typically supplied with two difference voltages. Most 110v outlets can survive 220v across them and are sometimes expected to in normal operation ie. The short answer is. When the two outlets are on opposite legs of a multi wire or edison branch circuit and certainly a 220v outlet will survive having a paltry 110v across it but they are configured differently to keep dunderheads from plugging the wrong thing into the wrong outlet and having it fry due to.
The answer is just that. Theres a big difference in 110v vs. How much power work you can get from an outlet is limited by two things. It was used almost exclusively for powering public street lights.
The issue is when you plug a 110 volt appliance into a 220 volt outlet or vica verca you are either under powering or over. The voltage in the usa started out at 100v. The public wanted them brighter so the power company turned up t. Nothing they are the same.