55be9034d4 To avoid accidental shock by electrical appliances/ equipment earth leakage relay/sensor are utilized at the source to isolate the power when leakage exceed certain limit. In this method, all earth conductors connected to a common (one or more) connecting points and then, earthing lead is used to connect earth electrode (earth plat) to the connecting point. To protect the joints from corrosion, put grease around it. The combined PEN conductor typically occurs between the substation and the entry point into the building, and separated in the service head. Earthing and Grounding is the same terms used for earthing.
In India as per Central Electricity Authority Regulations, CEAR, 2010, rule 41, there is provision of earthing, neutral wire of a 3-phase, 4-wire system and the additional third wire of a 2- phase, 3-wire system. For an LV customer, it is a TN-C system from the transformer in the street to the premises, (the neutral is earthed multiple times along this segment), and a TN-S system inside the installation, from the Main Switchboard downwards. While the national wiring regulations for buildings of many countries follow the IEC 60364 terminology, in North America (United States and Canada), the term "equipment grounding conductor" refers to equipment grounds and ground wires on branch circuits, and "grounding electrode conductor" is used for conductors bonding an earth ground rod (or similar) to a service panel. Earthing Lead: The conductor wire or conductive strip connected between Earth electrode and Electrical installation system and devices in called Earthing lead. Current sensing breaker are called RCB/ RCCB. Earthing through the Waterman5). The earthing electrode should always be placed in a vertical position inside the earth or pit so that it may be in contact with all the different earth layers.
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446 weeks ago