Yes. It is best to run a line from main breaker box to a separate 220V box with it's own breaker. You will need a licensed electrician to install if you are'NT comfortable doing this type of installation yourself.
True, 220 volt appliances consume less energy than 110 volt ones, but in order to use them in the US, you would need to convert them to 110 voltage. This is a less efficient use of energy. Plus, 220 volt appliances are a more risky because people can get seriously injured if they get shocked from them.
No. The 1-phase 240 setting on your computer's power supply is for the 240V wall outlets in other countries. The 240 outlets in your home are 2-phase 240.
In North American homes, new homes are prewired to use a 40 amp circuit. A 40 amp two pole breaker in the distribution panel protects a #8 three wire cable. This cable connects the 240 volt supply to the range and oven.
You can find a 120-volt outlet to charge your electronic devices in most homes, offices, airports, and public places. Look for wall outlets with two vertical slots and a round hole for grounding.
The vast majority of homes are supplied with 120/240 volt or 110/208 volt.
Install a 3 volt battery and forget any modifications. It will not operate on 12 volts.
You could but is it a total waste of money and is overkill. Use 12/2 with ground on all 120 volt outlets and light switches.
ya but ain't try it
To install a 220-volt appliance at home, you will need to ensure you have the correct outlet and circuit in place. Hire a qualified electrician to install the appropriate outlet, usually a NEMA 6-15 or 6-20 for 220-volt appliances. Make sure the circuit can handle the load of the appliance to prevent any electrical hazards.
If you never plug anything into them, there is no limit. If the total current drawn from all outlets exceeds 20 amps, the breaker will trip.
Most outlets in Cuba are 110 Volts and you can use the U.S. thin blade plugs. You may find some 220 volt outlets but they are normally marked as such.
No. To prevent this sort of thing from happening, the 277 volt device and receptacle is physically larger that a 240 volt receptacle and will not fit in a regular receptacle junction box. For a 277 volt system the proper size junction boxes have to be purchased.