Electricity / Electricidade: Earthing System / Terra

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Electricity / Electricidade: Earthing System / Terra

Post by SteelInferno on Fri Aug 29, 2014 11:17 pm

Earthing System



Earthing System
In electricity supply systems, an earthing system or grounding system is circuitry which connects parts of the electric circuit with the ground, thus defining the electric potential of the conductors relative to the Earth's conductive surface. The choice of earthing system can affect the safety and electromagnetic compatibility of the power supply. In particular, it affects the magnitude and distribution of short circuit currents through the system, and the effects it creates on equipment and people in the proximity of the circuit. If a fault within an electrical device connects a live supply conductor to an exposed conductive surface, anyone touching it while electrically connected to the earth will complete a circuit back to the earthed supply conductor and receive an electric shock.

É o condutor elétrico (fio) cuja função é conectar à Terra - ou seja, ao Terra Elétrico - todos os dispositivos que precisarem utilizar seu potencial como referência ou valer-se de suas propriedades elétricas.

O fio terra, uma vez que encontra-se sempre neutro e (teoricamente) presente em todo circuito elétrico, é sempre tomado como ponto de referência para a medida de potenciais, sendo a ele atribuído, então, o potencial de zero volts.

Fontes/Sources: Wikipedia Wikipedia


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