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In the home, two wires (live and neutral) carry the current and the third wire is the earth, which is for safety.
The earth (ground) wire connects together the external metal surfaces of all appliances, so that even in most fault conditions you will not get a shock by touching two at one time, e.g. the cooker and the toaster, because the surfaces are already connected together.
If a fault occurs and a live wire touches the metal surface, the earth wire is there to conduct the fault-current and trip the circuit-breaker to make it safe.
The house earth wire is also connected to the gas and water pipes to reduce the risk of electric shock, particularly in the kitchen and bathroom. In UK houses the connections must be made as close as possible to where the services enter from outside, using a continuous copper wire of at least 10 sq. mm. cross section.
Finally the house earth wire is also connected physically to the ground via an earth-rod, which prevents the buildup of static electricity in the house during storms.
In Europe, live is brown, neutral is blue, earth is yellow/green stripes. Other places might have different codes.
What else can I help you with?
What is the purpose of the third wire?
By "third wire" I believe you are speaking of the ground wire. Its only purpose is to ensure that the over-current device, which is the breaker or fuse, operates property when a fault exists in the circuit. Without the ground wire you increase your risk of injury, death, or property damage. It is there for your protection. Do not remove it. Always choose to use it when it exists.
What is the purpose of the third wire on the electrical cord of a power tool?
The third wire is the ground wire, designed to protect the user from electrical shock by providing a path for current to safely flow in the event of a malfunction or short circuit. It helps to prevent electric shock and reduces the risk of electrical fires.
What is the third green wire on an electric drill is the wire?
it is the earth wire
What is The third green wire on an electric drill is the?
It is earth wire
What do you do with third wire when changing light switch?
If the third wire (usually a ground wire) is present, connect it to the green or bare copper wire in the electrical box to properly ground the switch. If the third wire is a neutral wire, it should be capped off with a wire nut and not used for a standard single-pole switch. Make sure to follow proper wiring procedures and consult a licensed electrician if you are unsure.
What is the purpose of the third wire?
By "third wire" I believe you are speaking of the ground wire. Its only purpose is to ensure that the over-current device, which is the breaker or fuse, operates property when a fault exists in the circuit. Without the ground wire you increase your risk of injury, death, or property damage. It is there for your protection. Do not remove it. Always choose to use it when it exists.
When was Third Wire created?
Third Wire was created in 1999.
What is the purpose of the third wire on the electrical cord of a power tool?
The third wire is the ground wire, designed to protect the user from electrical shock by providing a path for current to safely flow in the event of a malfunction or short circuit. It helps to prevent electric shock and reduces the risk of electrical fires.
What is the third green wire on an electric drill is the wire?
it is the earth wire
What is the purpose of the RH wire on a thermostat?
The purpose of the RH wire on a thermostat is to provide power to the heating system.
What is the purpose of a wire?
it is the brown wire in a three pin plug
What is The third green wire on an electric drill is the?
It is earth wire
What is the third (green) wire on a electric drill is the?
It is earth wire
What is the purpose of the blue wire in a thermostat?
The purpose of the blue wire in a thermostat is to connect the thermostat to the air conditioning system.
What is the purpose of the brown wire on a thermostat?
The purpose of the brown wire on a thermostat is to connect to the C terminal, which provides power to the thermostat.
What is the purpose of a white wire with a black stripe in electrical wiring?
The purpose of a white wire with a black stripe in electrical wiring is to indicate that the wire is being used as a hot wire, carrying current to power a device or appliance.
What do you do with third wire when changing light switch?
If the third wire (usually a ground wire) is present, connect it to the green or bare copper wire in the electrical box to properly ground the switch. If the third wire is a neutral wire, it should be capped off with a wire nut and not used for a standard single-pole switch. Make sure to follow proper wiring procedures and consult a licensed electrician if you are unsure.
