Misunderstanding of bathroom decoration: no need to do local equipotential bonding in any bathroom
Many people think that the electrical appliances for the bathroom have been grounded through the PE wire and protected by a leakage protector, so the metal appliance does not need to be locally equipotential bonding.
Correct explanation: Local equipotential bonding and leakage protectors are two different safety protection measures and cannot be replaced by each other. The role of equipotential is to ensure that a certain potential is substantially equal and does not cause a large voltage to harm the human body. The function of the ground wire is to ensure that the resistance between the leakage portion and the earth is relatively small, thereby ensuring that the current flowing through the human body is small. One is to ensure that the voltage is small, and the other is to ensure that the current is small.
Misunderstanding of bathroom decoration 2:: Local equipotential can cause electric shock accident
The local equipotential will introduce the external high voltage into the room, causing an electric shock accident. It is better to introduce this potential from the grounding wire into the grounding device for safety.
Correct explanation: As long as the potentials are equal and no potential difference is generated, there is no electric shock accident, and it is not necessary to introduce the potential into the grounding device. The local equipotential requirement requires that the resistance in the local area is not more than 3 Ω. As long as the bathroom can be connected into an equipotential body, even if there is a high voltage outside, the person can not touch the external high-voltage conductor in the bathroom, which is safe. .
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