What is earthing? What is a circuit breaker?

5 pts.
Tags:
Electrical
Could somebody tell me what is earthing and circuit breakers (in terms of electricity technology)?

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Welcome to ITKE, KAMUGiSHA! Earthing pertains to the circuitry that connects different parts of the electrical circuit to the ground.

For a circuit breaker, it’s an electrical switch that’s designed to protect the circuit from damage (either by an overload or short circuit).

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  • piyushchavda
    EARTHING IS REQUIRED TO PROTECT THE ELECTRICAL EQUIPMENT AND PERSON AGAINST SHORT CIRCUIT OR UNHEALTHY CONDITION.
    DURING ANY UNHEALTHY CONDITION THE FAULT CURRENT WHICH IS FLOW FROM BODY TO EARTH THROUGH EARTH WIRE TO PROTECT THE EQUIPMENT AND PERSON.

    CIRCUIT BREAKER IS ELECTRICAL DEVICE WHICH OPERATE MANUALLY IN HEALTHY CONDITION AND AUTOMATICALLY IN FAULTY CONDITION.
    IT HAS TWO MAN PARTS FIX CONTACT AND MOVING CONTACT . WHENEVER THE FAULT OCCUR THESE MOVING PART IS SEPARATE THE CIRCUIT FROM THE LINE TO PROTECT THEM.
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  • ToddN2000
    In layman terms "earthing" refers to grounding an electrical circuit. For most electrical devices that have a 3-prong power cord the round pin is the ground. For things wired directly, like ceiling fans, overhead lights, outlets and light switches there is a green "ground" wire. This works to channel an electrical problem into the ground safely. 

    Circuit breakers are used to "break" the current flow in case of a power surge. It trips the switch to an "off" position and stops the flow of electricity to that circuit. It has to be manually reset to  "ON" after it has been tripped. Circuit breaker have replaced the old screw type fuses (15 and 20 amp if I remember)  that were used in many older homes. Circuits are usually tripped if too many devices are drawing electricity on the same circuit.
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