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In physics and electrical engineering, a conductor is an object or type of material that allows the flow of electrical current in one or more directions. For people, a wire is an electrical conductor that can carry electricity along its length.In metals such as copper or aluminum, the movable charged particles are electrons.Positive charges may also be mobile, such as the cationic electrolyte (s) of a battery, or the mobile protons of the proton conductor of a fuel cell.n metals such as copper or aluminum, the movable charged particles are electrons. Positive charges may also be mobile, such as the cationic electrolyte (s) of a battery, or the mobile protons of the proton conductor of a fuel cell.
A grounded system is a system in which one of the current-carrying conductors is grounded. An  equipment grounding conductor  is a conductor that does not normally carry current (except under fault conditions) and is also connected to earth.n some areas, the term earthing is used instead of grounding. A  grounded conductor  is a current-carrying conductor that normally carries current and is also connected to earth. Examples are the neutral conductor in AC wiring and the negative conductor in many DC systems.