240 VOLT HOUSE WIRING
Understanding 220 or 240 volt Electrical Circuits
This is why 240 volt circuits connect to double pole breakers that are essentially two single pole breakers tied together. In the main panel, every other breaker is out of phase with the adjoining breakers. So, in essence 240 volt wiring is powered by 2 - 120 volt hot wires that are 180 degrees out of phase.
Wiring a new 240 volt circuit - YouTube
Click to view on Bing5:43Running a wire from a new breaker in the breaker panel to a workshop area in the basement for a 240 volt circuit for my table saw and bandsawAuthor: Matthias WandelViews: 519K
How to Install a 240-Volt Circuit Breaker
A 3-wire, 240-volt circuit has two hot wires—each supplying 120 volts for a total of 240—and an equipment ground wire. A 120-volt circuit has only one hot wire connected to the breaker plus a neutral wire connected to the neutral bus bar in the service panel.Author: Bob Formisano
Understanding the Difference Between 120 and 240 Volt
A 240 volt outlet, on the other hand, is larger, with room for three individual plugs or four plugs of varying size. You may think that the safe route, then, is to simply go with 120 volt outlets throughout your home. But as it turns out, both the 120 volt and 240 volt alternatives can be beneficial, depending on your needs (and appliances).
Household Electric Circuits
Household Wiring. The standard U.S. household wiring design has two 120 volt "hot" wires and a neutral which is at ground potential. The two 120 volt wires are obtained by grounding the centertap of the transformer supplying the house so that when one hot wire is swinging positive with respect to ground, the other is swinging negative.