The neutral wire and the ground wire is connected opposite, why does the circuit breaker trip when using electrical appliances?

- Dec 27, 2020-

The neutral wire and the ground wire is connected opposite, why does the circuit breaker trip when using electrical appliances?

The neutral wire and the ground wire is connected oppsite, why does the circuit breaker trip when using electrical appliances 1


If the neutral wire and the ground wire are reversed during decoration, the circuit breaker will trip when using the electrical appliance; if there is no trip, and then the earth leakage circuit breaker in the home is broken.

 

The neutral wire and the ground wire is connected opposite, why does the circuit breaker trip when using electrical appliances?

 

The switch configuration in the distribution box at home is generally that the lighting circuit uses miniature circuit breaker, and all the other circuits are used for earth leakage circuit breaker. The principle of the leakage protection switch is to detect whether the vector sum of the current between the live wire and the neutral wire is zero, that is, to detect whether the current through the live wire and the current through the neutral wire are equal, if the current of the live wire and the neutral wire are not equal, the earth leakage circuit breaker will trip and protect the line.

The neutral wire and the ground wire is connected oppsite, why does the circuit breaker trip when using electrical appliances 2


When the home is renovated and the neutral wire and the ground wire are reversed, the current will flow out from the live wire, and then flow back to the distribution box through the ground wire, and finally flow from the earth copper bar in the distribution box to the ground. At this time, the leakage circuit breaker will detect that the current of the live wire and the current of the neutral wire are inconsistent, and then judge it as a leakage, so that the trip has achieved the purpose of protecting the circuit.

 

Therefore, as long as the power distribution in the home is configured in accordance with the requirements of the standard, when the neutral wire and the ground wire are connected reversely, as long as the electrical appliances are working, there will be a trip. If circuit breaker not trip, it means there is a problem with the layout of the home circuit.