A lot of people call an electrical receptacle a "plug". If that is what is meant in this question, the answer is:
First make sure that you have the power turned off at the main breaker panel. One socket of the receptacle will needs a white wire and the other side needs a black wire. The center (ground) socket needs a green wire.
However, if this question may be asking about the connector at the end of an electrical cord which has projecting prongs (also called blades or pins) that "plug into" a matching receptacle. In that case the answer is: people have been replacing electrical plugs for years. You don't need an expensive professional electrician just to replace a plug on your radio or a lamp! The power will be off if you just unplug it from the receptacle. One prong or blade of the plug will need a white wire and the one on the other side needs a black wire. The center (ground) prong or blade needs a green wire.
<><><>
As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.
Before you do any work yourself,
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized
IF YOU ARE NOT REALLY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
Yes. Your 120 volt outlet can actually be anywhere from 110 volts to 127 volts.
If you're traveling, pay attention to the "Hz" number. In the USA and places that bought their very first power plants from Westinghouse its 60Hz. Europe and those who got their first power plants from AEG (in Germany) use 50Hz. Asia is mixed by country, but Japan is split down the middle.
can you plug a 115 volt into a 110 volt
White.
A 220 volt treadmill will not run on 110 volt power. if you would wire it to plug in, the low voltage would causes the treadmill to burn up. You will need to install a 220 volt receptacle for it to plug into and work properly. <<>> In the above answer the treadmill will not burn up but at these amperages it will make a very big flash if it shorted out. Also it must be some treadmill to draw 220 amps and I have never seen a 110 amp wall socket.
white. Screws on that side (neutral) should be silver. "Brass" side gets the Black (hot) wire.
No, it won't get enough power and won't work.
can you plug a 115 volt into a 110 volt
NO
White.
Yes.
no
no
There is a direct short after the switch.
115 Volt and a 110 Volt can be treated as the same thing. The electrical voltage supplied from your electric company is not exact and can be 120 Volt + or - 10%.
No, the applied 110 volt is too high for a 3 volt appliance. The appliance would burn out right away.
A 220 volt treadmill will not run on 110 volt power. if you would wire it to plug in, the low voltage would causes the treadmill to burn up. You will need to install a 220 volt receptacle for it to plug into and work properly. <<>> In the above answer the treadmill will not burn up but at these amperages it will make a very big flash if it shorted out. Also it must be some treadmill to draw 220 amps and I have never seen a 110 amp wall socket.
The bulb will be about half as bright.
white. Screws on that side (neutral) should be silver. "Brass" side gets the Black (hot) wire.