yes
If it does not come with a plug on it, no. If it is made for direct wire, then 99.9% chance is that it is a 240 volt unit. If you plug it into a 120 volt outlet your water will barely get warm.
Take the plug in your hand, and insert the plug into the wall outlet.
No conversion needed. These are nominal voltages which range from 110 to 120 volts. It will operate fine on the outlet.
yes but it will not be as good eg if it is a phone charger it will take longer to charge
If the plug fits you are good to go. The typical range of residential voltage is from 110 to 125 VAC. You are fine within this range.
Because it is a 220 volt outlet instead of a 120 volt outlet. Now, if this is a standard 120 volt outlet that is reading 209 volts then someone has made a mistake in the wiring. You need to call an electrician to straighten this out.
Use a volt meter Plug a 120 volt accessory into it
Nominally 110 to 120 volt power strip is okay to connect to a standard outlet.
Answer for USA, Canada and countries running a 60 Hertz supply service.Need to know the voltage of the outlet plug. On a 120 volts outlet there is one hot terminal and on a 240 volt outlet there are two hot terminals.
A 120 volt duplex outlet is the main type of outlet for residential outlet system. The wires are typically white and black, and there should only be two of them.
Yes, normally, assuming it's 60 cycle (hertz) AC. In the USA, 110 volts as such is no longer used, it's really 120 plus or minus about 5 volts everywhere.
Someone has wired 240 volts into your 120 volt outlet. If you have 240 volts you need a specially configured outlet so that a standard 120 volt plug cannot be inserted. If you have this situation you would see 120 volts to ground and not neutral. Sometimes if you don't look carefully an outlet will look like the standard 120 volt variety but it isn't. One of the slots is horizontal and not vertical although there may be a small vertical split. 240 volts doesn't just magically appear. What you are describing is on purpose. If it really is 120 volt receptacle you need an electrician to put in the proper receptacle or re-wire the circuit.