How many volts does a house run on?

Answer 1

120 volts and 240 volts. Typically 240 volts is supplied to the house electrical service entrance. It is split into it's 120 volt components via two buss bars. Hooking a circuit up to just one bar yields 120 volts. Hooking into both gives 240 volts.

Answer 2

In the United States, most residential houses run on 120 volts for standard outlets and 240 volts for larger appliances like dryers and electric stoves. However, some countries use different voltages, so it's important to check the local electrical standards when traveling or moving to a different country.