What happens if live wire touches metal case?
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What happens if live wire touches metal case?
If the live wire touches the metal casing accidentally, current will flow through the casing and the user touching the casing will get an electrical shock. The earth wire has a resistance much lower than the human body. This will allow the current to flow through it to the ground instead of through the user’s body.
What happens when a hot wire touches metal?
A ground fault occurs in residential circuitry when a hot wire contacts the ground wire or a grounded element, such as a metal box, and electricity then flows immediately to ground. The danger of electrocution occurs if a person is in contact with that ground path through which the current flows.
Will a fuse protect you if you touch a live wire?
The fuse or circuit breaker must be connected in the live wire side of a domestic circuit to ensure that it keeps high voltage from reaching the user, or surroundings, if a fault develops. A fuse protects the appliance but does not protect the person using it.
What happens when an exposed live wire touches a neutral wire directly?
The path from the live to the neutral wire has very low resistance and will create a short circuit if the large current exceeds the fuse rating. There will be a blow.
Why fuse is connected with live wire?
The fuse wire is always connected in the live wire of the circuit because if the fuse is put in the neutral wire, then due to excessive flow of current when the fuse burns, current stops flowing in the circuit, but the appliance remains connected to the high potential point of the supply through the live wire.
Why the fuse and switch must be on live wire?
Once the fuse has melted, the circuit is broken and no more current flows through the device. The fuse or circuit breaker must be connected in the live wire side of a domestic circuit to ensure that it keeps high voltage from reaching the user, or surroundings, if a fault develops.
What happens when 2 Live wires touch?
You will receive a shock if you touch two wires at different voltages at the same time. You will receive a shock if you touch a live wire and are grounded at the same time. When a circuit, electrical component, or equipment is energized, a potential shock hazard is present.
What happens when two hot wires touch?
A short circuit happens when a “hot” wire (black) touches another hot wire or touches a “neutral” wire (white) in one of your outlets. When these two wires touch, a large amount of current flows, creating more heat than the circuit can handle, so it shuts off.
Does fuse prevent electric shock?
The normal home fuse (fuse and line circuit breaker) offers no protection against electric shock as it reacts too slowly and protects only the cables against overload and thus prevents extensive damage. Real protection against electrocution is provided only by “RCD” circuit breakers.
What happens if a ground wire touches a live wire?
If you touch it, you may complete a circuit between the live wire and the earth (because you’ll be standing on the floor), so you get a shock. The flow of charge (current) in a circuit can travel in one direction around the circuit only. This is due to a direct supply of potential difference, also known as dc.