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Terms of trade: What is an earth?

Ground or ground wires are connected directly to ground, providing a point of comparison with the voltage in the rest of a system, and protecting devices (and people) from insulation faults by tripping circuit breakers to power outages. Excessive ground voltages can be dangerous and cause electric shock to grounded people touching them.

Ground connections also prevent static electricity from building up in some units, and in some circuits the ground can even act as a conductor, reducing costs.

Even many electronic devices without physical connection to the ground have a conductor called the ground. Also known as “regular”

;, they provide a uniform path for current to return from different locations on a circuit.

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