I am assuming you are trying to find all outlets that are connected together in a circuit. The easiest way is to have a tone generator. They make a few different kinds. In one you plug in a tone generator that is built into a standard AC plug and you can put the receiver at the electric panel to locate the breaker that controls that outlet and you would do this for all outlets by "Toning Out" each outlet in question.
In another method you connect a tone generator to any outlet and then use the receiver to see which other outlets have the tone present. In this method you should turn off the power to the outlet you are using as the starting point.
If you have no tone generator you can turn off breaker for the outlet where you will start and use a volt meter to find all other outlets that are off.
You can get a good toner for $20 to $30.
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