Where should earth wire be placed?

The grounding is a connection between the earth (called here "grounding" at 0 volt potential) and metal casings of electrical appliances that are faulty. This connection is made with a conducting wire. The electrical insulation fault is then closed; the electrical installation is therefore no longer dangerous for humans.

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The electrical appliance can also be switched off by means of a differential circuit breaker: this device automatically cuts off the power supply in the event of leakage current; the latter then passes immediately into the earth. Electric shocks are thus avoided.

Earthing is therefore a matter of safety first and foremost (home, professional premises...) and helps avoid any risk of electrocution. It also allows to protect electrical appliances (washing machine, dishwasher for example) to avoid that they are damaged too quickly.

The earth is connected to the armature of light points, sockets and boxes of class 1 electrical appliances only.

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Why Does Wiring Need to be Grounded?

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Install grounding wire to provide a current with alternate paths to avoid electrical shocks in case of power surges. Run ground wires parallel to hot and neutral wires in a branch circuit. Connect electrical service boxes to grounding rods.

Electrical wire is designed to conduct current from a breaker box, transformer or electrical supply to provide power to an appliance, outlet or other destination (also called the &#;load&#;). 

The path that the current takes from the source and back is called a circuit. Circuits that extend from the breaker box to the device are called branch circuits. Copper wires have low electrical resistance and carry current efficiently through circuits.

A short circuit occurs when a high electrical current finds a low-resistance path not designed to carry electricity, such as a hot wire contacting a metal plate or other conductive object. Lightning strikes, static charges or other electrical surges can cause short circuits that lead to sparks or shocks. 

Electrical systems need grounding wire to prevent short circuits. During a short circuit, a ground wire connection provides current with a safe, low-resistance path, usually through a conductive material such as metal pipe, to prevent harmful discharges. Ground wires do not normally carry electrical current.

These are the major types of electrical wiring in a circuit:

• Hot wires carry the negative current from the supply to the appliance or other load. Black wires indicate negative current according to the National Electric Code (NEC).
• Neutral wires carry the positive current from the load back to the supply. White wires indicate positive current.
• Ground wire runs parallel to the hot and neutral wire and provides a safe pathway for the current to flow in case of a ground fault. Green or bare copper wires indicate ground wires.

Ground wires can be connected to anything that could cause electricity to leave its circuit. This can include metal pipes, metal plates, light switches and more.

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