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How does safety earth wire works in toaster?
The metal frame of the toaster is connected to earth (ground) so that should the line (live) conductor make accidental contact with that frame, the resulting earth-fault current will be large enough to operate the protective fuse or circuit breaker, which will disconnect the toaster from its supply. The earth wire is simply an alternative route back to the supply transformer for current.
Why do you need neutral if things work with earth connection since both r at same potential?
Neutral is the common return, and it expected to be a current carrying conductor. Earth (or ground), on the other hand, is a protective conductor that is not expected to carry current. It is there to provide a path for current in the event of fault, and to trip the protective device, i.e. fuse or circuit breaker. Earth is also not usually insulated, so it is not rated to carry current other than long enough to trip the protective device.
What is earth fault?
The current of the earth fault.is appox 1.7amp please verify this with book concepts of physics by h.c. vermabecause i read it few year back and at present i don't have that bookA current that flows from phase conductors to earth or protective conductors etc from the point of an insulation breakdown.
What are the functions of each of the three wires in a 3 pronged plug?
One is connected to the line conductor (there is no 'positive' conductor in a.c. systems), and the others are connected to the neutral and protective (earth/ground) conductors. In simple terms, you can think of the line and neutral conductors as the 'supply' and 'return' conductors.In North America, the line conductor has a nominal potential of 120 V with respect to the neutral; in Europe, the line conductor has a nominal potential of 230 V with respect to the neutral.The protective (earth/ground) conductor provides a low-resistance path back to the distribution transformer, which will enable the circuit's protective device (fuse or circuit breaker), which is always connected in the supply's line conductor, to operate should the line conductor accidentally make contact with the appliance's metal enclosure. A broken neutral conductor will not cause current to drain to earth through the protective conductor; should this happen, the load will simply stop working.Some equipment does not require the earth or ground conductor to be connected. These devices have additional insulation to prevent users being exposed to the line voltage.ColorsIn North America, the line conductor is black, neutral is white and earth is green.In Europe, Live or line is brown, neutral is blue and earth is yellow and green.
What is difference between isolation transformer and earth protection relay?
An isolation transformer is a mutual transformer having a voltage ratio of 1:1, so that the secondary circuit is electrically isolated from the primary circuit, yet subject to the same voltage.An earth protection relay is a category of protective relay that responds to an earth fault monitored by a current transformer (CT). In the event of an earth fault being detected by the CT, the relay with activate the trip circuit to a circuit breaker which will then disconnect the fault.
What forms a protective boundary between earth and space and provides conditions suitable for life?
the atmosphere
What is the difference between selv and pelv transformer?
the difference between pelv and selv is that pelv can have a protective conductor(earth)and selv cant.
Why is ozone in the stratosphere protective?
It protects the earth. It acts as a protective shield.
What gases help form the earth's protective shield?
The earth's protective shield is formed by one of the molecules of the oxygen. It is ozone.
What is Earth's protective layer?
atmosphere?
What doe the Earth's protective atmosphere block out?
Earth's protective layer blocks out the harmful ultraviolet rays. The ozone layer blocks it out.
Where is the earths protective ozone layer located?
The protective layer of earth i.e. the ozone layer is present in the stratospheric region of the earth. It protects the earth from the harmful UV radiations of the sun.
What is the difference between protective and functional earth?
protective earth (PE) is a conductor, other than a main earthing conductor, connecting any portion of the earthing system to the portion of the electrical installation. functional earth (FE) is an earthing arrangement provided to ensure correct operation of electrical equipment or to permit reliable and proper functioning of an installation
A protective shell over earth is formed by?
Atmosphere
Why you use protective earth?
we need to protect our earth because we live in that earth that's why we must protect the earth from dust.
Which planet has a protective blanket of ozone layer in the atmosphere?
Earth has a protective bnaket of ozone layer. It is present in stratosphere.
How do the protective layer that surrounds planet earth provide protection?
The protective layer is ozone layer. The protection is from UV.
