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Ground is more common in North American English, and earth is more common in British English.) Under normal conditions, a grounding conductor does not carry current. Neutral is a circuit conductor that normally carries current back to the source, and is connected to ground (earth) at the main electrical panel. In the electrical trade, the conductor of a 2-wire circuit connected to the supply neutral point and earth ground is referred to as the neutral.
Best Answer: The black is hot, the white is neutral. the white is common the black isn't. also if you have a bare ground, it is a common ground, The reason it's called common is the breaker box end of all the white wires goes to a common neutral bar in the box. The black wires go to specific breakers.