What Is The Purpose Of A Ground Wire?

When the equipment shell leakage, the current will quickly flow into the earth, even if the PE wire opens the circuit and from the nearby grounding body into the soil. Usually, a neutral wire and an earth wire are confused with people. Some people think that a neutral wire is a grounding cable.

Neutral wire and ground wire are not the same concept. The neutral wire is the neutral line’s common name, which is the working line provided by the power department, which is the two-wire lighting line used by every household in our house. The ground wire is the abbreviation of a grounding device, and the ground wire is divided into working grounding and safety earthing. Safety grounding can be divided into protective grounding, lightning grounding, and electromagnetic radiation grounding.

1. Work grounding is used to complete the circuit using equipment to achieve the ground wire’s performance requirements. Work grounding is the metal conductor block buried in the industrial soil. A point of it with a wire lead out of the ground, built a grounding system, grounding wire requirements grounding resistance is less than or equal to 4 ohms.

2. Protection grounding prevents people from using home appliances, office, and other electronic equipment when an electric shock accident and takes Protection measures. Household appliances and office equipment metal shells have grounding wire, such as its insulation damage shell charged, the current along with the installation of the grounding wire into the earth, to achieve the purpose of safety. Otherwise, it will cause harm to personal safety; with electricity regulations providing protection, grounding resistance should be less than or equal to 4 ohms. Insulation damage through the human body current is only one-fifth of the total current, thus playing a protective role.

3. protection grounding, currently are for special electronic equipment, the general family only two-wire socket, no ground, a variety of electrical appliances are not safe to use, some families even the grounding cable of the appliance casing to the tap water pipe or heating pipe, when a tap water pipe or heating appliances in an accident. May make the whole building water pipe or heating pipe fair, which is quite unsafe.