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The functional earth is used for interference suppression. It is a low-impedance current path between the circuitry and earth and is only used to improve the equipment's performance and not (!) for protective purposes.
I may be able to throw a dim light on clean earth. In broadcasting, technical equipment uses a clean earth which all signal circuits use as earth reference. This does not carry current and is separate from the power earth, which is the safety earth that power circuits are connected to. may be able to throw a dim light on clean earth. In broadcasting, technical equipment uses a clean earth which all signal circuits use as earth reference. This does not carry current and is separate from the power earth, which is the safety earth that power circuits are connected to.