Yes you can, it was manufactured before the new European standards were brought out.
I have no trouble with my 220 volt appliances.
A 15 amp 125 volt outlet is a household outlet.
Yes.
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.
A 210 volt outlet is an outlet that can provide power for an appliance that is up to 210 volts. Some examples of these could be dishwashers, washing machines, and dryers.
no
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No a 208 volt outlet does not need a neutral. 208 volts is the line voltage between any two legs of a three phase 208 volt system.
Yes, you can always have heavier wire than code requires.
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
Yes
No, it will cause the bulb to blow. A 12 volt light is DC voltage and your home outlet is AC voltage.