Answer for USA, Canada and countries running a 60 Hz supply service.
The NEC does not require a certain height. Place it where it is convenient for you.
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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 ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
2 ft would be the maximum.
Yes provided it is installed to code. You also might want to mark it in some way unless the plug is of a different configuration than the standard outlet.
No, it will cause the bulb to blow. A 12 volt light is DC voltage and your home outlet is AC voltage.
18 inches
There is no code ruling on this. I set mine 12" to center. If you are putting in a new outlet in an existing home I would suggest you just match it to the height of the rest of the outlets.
The standard height for a bathroom outlet is typically around 48 inches above the finished floor level.
The standard height for a refrigerator outlet is typically around 4 to 6 inches above the finished floor.
Most electrician use the height of an electrician's hammer to mark the bottom of an outlet box. That height is 18 inches.
The standard dimensions for an electrical outlet in the United States are approximately 2.75 inches in height and 1.5 inches in width.
I believe it to be about 12 inches at the minimum.
The standard dimensions for electrical sockets are typically 2.75 inches in height and 1.5 inches in width.
For a light switch in the home four foot to centre is a reasonable height. Some contractors set the outlet box at four foot to the bottom of the outlet box and other contractors set the box to four foot to the top of the outlet box. There is no code rule that stipulates the exact height that the outlet box must be set to.
There are no standard heights required for outside receptacles. Usually they are in accordance with the equipment that they are to supply voltage for. In areas that receive a high snow level they are positioned at a height so as to be accessible year round.
The standard amperage for a typical outlet is 15 or 20 amps.
The standard voltage of a wall outlet is 120 volts, and the standard amperage is 15 amps.
A standard outlet in the United States is typically rated for 15 amps.
The standard voltage requirement for a dryer outlet is 240 volts.