During the home circuit installation process, you should have heard of the grounding wire. So what is the role of the grounding wire? Generally speaking, the electrical equipment in the home is live. If an accidental contact occurs, it is easy to If an accident occurs, the grounding wire can lead the electricity outside the equipment to the ground to prevent accidents. So how to judge whether the socket is grounded? Let's take a look.
1. The role of the ground wire
1. One is that it can reduce the electric shock voltage in case of electric shock due to leakage
2. The switchgear currently used is generally Leakage protector, when there is leakage, the current passes through the ground circuit and does not pass through the zero-sequence current transformer in the protector. In this way, the leakage current is detected, and the protector automatically cuts off the power.
3. If Using an air switch can increase the short-circuit current, causing the circuit breaker to cut off power. Simply put, it is to prevent the danger of electric shock from expanding.
2. How to judge whether the socket is grounded
Tools: Electrical test pen
1. Press the metal part of the head and the last part of the electric pen with your hand When pressing the button, a small light will light up on the pen, but there will be nothing on the LCD screen. With this method, you can determine whether the electric pen is in good condition.
2. Test the live wire (phase wire). The small light will be very bright and there will be corresponding numbers on the LCD screen.
3. Test the neutral line. The small lamp will be much dimmer than before, and the LCD screen will have no numbers.
4. Test the ground wire. The effect is the same as testing the zero line. If the ground wire is not wired according to regulations, the small light will not light up.
What is the function of the ground wire? How to judge whether the socket is grounded. The relevant content is introduced here. I hope it will be helpful to everyone in decoration. If you want to know more about home decoration, please pay attention to the home decoration network. .
Article source: /news_14311/