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3 Rules for the Correct Connection to Ground of Electrical Installations

Electric shock can be received in most of the times fatal due to the tensions used in residential electrical installations. Touching a switch or an output terminal is not the only way by which a shock can be received. A damaged insulation section may cause contact between a bare conductor and the metal protective cover. In this case, if the proper precautions are not taken, the metal cover is tensioned with respect to the earth.

Any possibility of dangerous situation can be eliminated by interconnecting all metal covers of household appliances and all boxes and cabinets of the electrical installation such as:
  •     The cabinets for circuit breakers.
  •     The compartments for engines.
  •     Any other metal cover in the local electrical system.

If any conductor comes into contact with one of these metal covers, a short circuit condition will occur. The circuit breaker that protects the branch circuit will open, and the dangerous voltage will be immediately eliminated. You can not ignore the short circuit that produced the dangerous condition, because the energy can not be restored until the contact of the driver and the cover has been located and eliminated.

3 Rules for the Correct Connection to Ground of Electrical Installations

Correct Connection to Ground of Electrical Installations


This method of protection against electric shock must be used in all electrical installations. It is achieved by carefully following a few simple rules:
  • Whichever type of electrical power is being distributed, the neutral wire of the power circuit must be connected to the ground as close as possible to the electrical connection. This connection is made using a rod with steel core and copper surface submerged to a depth of not less than 2.40 m in the earth; This grounding electrode must be complemented by interconnecting it with other options such as metal water pipes, steel frames in buildings and recessed concrete rods.
  • Once the neutral conductor is grounded, it enters the main switch box without any break or interruption and must continue on its way to the load center inside the house. Both he and all his extensions must always be identified by a white or gray isolation.
  • Because this conductor is connected to all loads, it carries electric current, but is connected to a ground potential or zero potential. This conductor flows into the neutral bar inside the load center.
  • Starting from the neutral bar in the load center, and using a green conductor or a bare conductor, all the metal protective covers, all the cabinets, and all the contacts of the electrical installation must be interconnected. ground terminal. While this green wire is connected to the same ground potential as the neutral conductor, it is never used to conduct electrical current.

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