In electricity supply systems, an earthing (grounding) system defines the electrical potential of the conductors relative to that of the Earth's conductive surface. In electricity supply systems, an earthing (grounding) system defines the electrical potential of the conductors relative to that of the Earth's conductive surface.
In electrical engineering, ground or earth is the reference point in an electrical circuit from which voltages are measured, a common return path for electric current, or a direct physical connection to the Earth. For measurement purposes, the Earth serves as a (reasonably) constant potential reference against which other potentials can be measured. An electrical ground system should have an appropriate current-carrying capability to serve as an adequate zero-voltage reference level. The earth wire usually carries no electricity. The earth wire is connected to the inside of an appliance that has a metal case. When the appliance is working correctly, the live wire supplies the electricity which flows through all of the components. The neutral wire completes the circuit.  Report Abuse. It is not permitted to use a water pipe as a means of earthing in the uk. However the consumers earth terminal in the consumers unit should have an Earthing conductor which should connect to earth via the supply cable earth terminal or earth rod. This is not an expensive fix. You need an electrician to come in and bond to your water pipe. They will take a grounding strap to your supply pipe, and run a ground wire to your grounding buss in your meter. This should not cost more than $200 dollars for professional help. Rating Newest Oldest. Best Answer: It literally means electrically connecting it, or some parts of it, to earth or ground. There are often (in fact usually) parts of electrical appliances which are not under voltage and play no part in the electrical functioning of the appliance. Inside the appliance the earth wire is connected to the body of the appliance. It provides safety. So if there is a short circuit or some current leaks intot he body of the appliance the same is transmitted tot he ground thru the earth wire. Earth in an electrical installation usually refers to ground. An equipment or electrical appliance has to have a ground wire to protect users from electrocution in case of electrical leakage. Most things on the surface of the earth are at the same electrical potential as the earth itself-if something (or someone) was not, an electrical current would flow to or from it to the earth until tthe potentials were equal. This can sometimes happen if you are insulated from the earth by, say, rubber shoes. Earth means literally a connection to the earth. Electrical voltages are all relative measurements of differences in electrical potential. Most things on the surface of the earth are at the same electrical potential as the earth itself-if something (or someone) was not, an electrical current would flow to or from it to the earth until tthe potentials were equal. This can sometimes happen if you are insulated from the earth by, say, rubber shoes. Where a real ground connection has a significant resistance, the approximation of zero potential is no longer valid. Stray voltages or earth potential rise effects will occur, which may create noise in signals or if large enough will produce an electric shock hazard. For measurement purposes, the Earth serves as a (reasonably) constant potential reference against which other potentials can be measured. An electrical ground system should have an appropriate current-carrying capability to serve as an adequate zero-voltage reference level. Electrical circuits may be connected to ground (earth) for several reasons. In mains powered equipment, exposed metal parts are connected to ground to prevent user contact with dangerous voltage if electrical insulation fails. For measurement purposes, the Earth serves as a (reasonably) constant potential reference against which other potentials can be measured. An electrical ground system should have an appropriate current-carrying capability to serve as an adequate zero-voltage reference level. In electricity supply systems, an earthing (grounding) system defines the electrical potential of the conductors relative to that of the Earth's conductive surface. The choice of earthing system has implications for the safety and electromagnetic compatibility of the power supply. For measurement purposes, the Earth serves as a (reasonably) constant potential reference against which other potentials can be measured. An electrical ground system should have an appropriate current-carrying capability to serve as an adequate zero-voltage reference level. Earthing means connecting the metal casing of the electrical appliance so that if the appliance develops a fault the electrical current will flow to earth through the earthing wire and not through you which could prove fatal. Most things on the surface of the earth are at the same electrical potential as the earth itself-if something (or someone) was not, an electrical current would flow to or from it to the earth until tthe potentials were equal. This can sometimes happen if you are insulated from the earth by, say, rubber shoes.
https://en.wikipedia.org/wiki/Ground_%28electricity%29 http://www.gcsescience.com/pe39.htm https://uk.answers.yahoo.com/question/index?qid=20060920075217AALNQ61 https://answers.yahoo.com/question/index?qid=20110915024523AAQusB4 https://uk.answers.yahoo.com/question/index?qid=20071130023651AACHcMz https://uk.answers.yahoo.com/question/index?qid=20071130023651AACHcMz https://en.wikipedia.org/wiki/Ground_%28electricity%29 https://en.wikipedia.org/wiki/Ground_%28electricity%29 https://en.wikipedia.org/wiki/Ground_%28electricity%29 https://uk.answers.yahoo.com/question/index?qid=20071130023651AACHcMz
what does earthed mean in electricity