Earth tester equipment is used to find the earth resistance and took current readings n times for a fixed voltage. Which of the following is considered as the earth resistance?

Earth tester equipment is used to find the earth resistance and took current readings n times for a fixed voltage. Which of the following is considered as the earth resistance?

Right Answer is:

Lowest resistance in n readings

SOLUTION

For a fixed voltage, when current readings are taken n times, the lowest value of resistance in ‘n’ readings is considered to be the value of earth resistance.

  1. Purpose of Earthing: Earthing is a safety measure in electrical systems designed to provide a path for fault currents to flow safely to the ground. This helps prevent electric shocks and reduces the risk of damage to equipment in the event of a fault.
  2. Minimum Resistance Path: Fault currents will indeed follow the path of least resistance. The lower the resistance of the earth connection, the easier it is for fault currents to dissipate harmlessly into the ground.
      • This is crucial for the efficient operation of protective devices, such as fuses and circuit breakers, which rely on detecting abnormal currents to disconnect faulty equipment.

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