Originally posted by Russell W. Barnes Oh? Interesting, that... I thought there was a 220V single-phase supply available for larger domestic appliances (washing machines, cookers, etc...) and was centre-tapped to get the 110V (or is it 240 / 120V?) for regular sockets and lighting? Or maybe this isn't a universal option? But it's just what I've read.
We do get 220 V for the big stuff (where I am it's the air conditioners and the clothes dryer, most of the other things that heat in my house use natural gas). That's three receptacles for me. If I ever get an electric car, that will likely be four...
In the electrical panel (with the circuit breakers, located inside the house, generally), the receptacles are split off on circuits as they need to be, but it is uncommon to have a 110 V receptacle on a 220 V circuit, even though the wires are there (and it is probably illegal). So everything else in the house is 110 V.
My house is 100 years old, with the electrical service having evolved with codes as it went, so I have basically four styles of electrical wiring in my house. The 1920s-vintage and 1940s-vintage are missing the now-obligatory ground wire. I've basically isolated those circuits as best I can to reduce the chance they will do something bad... though those outlets are ideal for charging phones
It makes doing anything electrical in the house an adventure...
-Eric