A circuit is electrically grounded when charges are able to flow directly from the circuit into Earth in the event of a short circuit.
AnswerYou are probably thinking about what is called a 'chassis ground' or 'chassis earth'. Cars' electrical systems are examples chassis ground systems.
Using a car as an example, one terminal of the battery (usually the negative terminal) is connected directly to the metal body (the 'chassis') of the vehicle. The other terminal then supplies the various electrical loads in the car. An individual circuit consists of a single insulated cable running, via a switch, to, say, a headlamp; the return part of the circuit is then through the metal bodywork of the car. So the car's bodywork acts as the return conductor to the battery. Using a chassis earth dramatically reduces the number of conductors required by all the various loads within a car, as the chassis of the vehicle acts as the return conductor for each circuit.
A chassis ground may, or may not, be itself connected to the general mass of the earth itself. In the case of a car, the chassis earth is not connected to the earth itself.
In most other cases, ground or earth connections are made between the metal housing of an electrical appliance and the general mass of the earth itself. In the event of a line conductor accidentally making contact with the housing of an appliance, an earth fault is applied to that circuit, causing the fuse or circuit breaker supplying that circuit, to trip. In other words, the purpose of this type of earth connection is to protect against a shock hazard. The reason this sort of protection is necessary is because the supply transformer's neutral is grounded at the substation, and offers an alternative route for a fault current to return to the source.
Electric circuits need an earth wire for safety. The earth or ground wire connects the external surfaces of all appliances together, and to the gas and water pipes, and to ground. The only exception is for low-power doubled insulated portable devices like table-lamps or hair dryers.
because of its covering.
Electricity is a flow of current (moving charges) and has to flow into and out of a circuit or other object. In automotive applications, the metal body of the car is often used as part of the negative conduit. In grounded circuits for alternating current, any connection to the ground can provide a path (short circuit, electric shock). In lightning, any object in the path of current flow, either upward or downward, may carry the flow of high-voltage charges.
Rubber-soled shoes don't prevent the wearer from being electrocuted. They do, however, prevent the electric charge being grounded to earth, which reduces the damage done to the human body.
An electrical load center, also known as a circuit breaker panel or distribution board, is a central point where incoming electrical power is divided and distributed to multiple circuits within a building. It typically contains circuit breakers or fuses to protect the circuits from overloading and short circuits.
Colin D. Simpson has written: 'Principles of DC/AC circuits' -- subject(s): Electronic circuits 'Introduction to Electric Circuits and Machines' -- subject(s): Electric circuit analysis, Electric circuits, Electric machinery 'Industrial electronics' -- subject(s): Industrial electronics
In electrical circuits, the flow of electric current is common.
J. Richard Johnson has written: 'Electric circuits' -- subject(s): Electric circuits
Edward Nicholas Pink has written: 'The electric and magnetic circuits' -- subject(s): Electric circuits, Electric currents, Magnetism
Electrical circuits are grounded to the earth.
Battery
Sadly no...
They can, but not required.
yes
Roland E. Thomas has written: 'The analysis and design of linear circuits' -- subject(s): Linear Electric circuits, Electric circuit analysis, TECHNOLOGY & ENGINEERING / Electronics / Circuits / General, Design and construction 'Solutions manual to accompany Circuits and Signals' 'Circuits and signals' -- subject(s): Interface circuits, Linear integrated circuits
Impressionist paintings are a non-example of electric circuits.
Thomas S. Kubala has written: 'Electricity One' 'Electricity' 'Electricity 1' -- subject(s): Electrical engineering, Direct current, Electric circuits, Electric machinery 'Electricity 2' -- subject(s): Electrical engineering, Electric circuits, Alternating current 'Electricity One Devices Circuits, Materials' 'Circuit concepts' -- subject(s): Electric circuits