A, what is equipotential?
In our home electricity, electrical appliances, a wide range of types of metal conductors can be found everywhere, such as faucets, heaters, stainless steel shower, and some electric fitness equipment shell, etc., if one of the appliances shouldn't be electrically charged, such as has been ground off the insulating paint oven's metal casing, oven casing relative to the ground presents a high voltage, the other appliances Shell relative to the low voltage, if the hand touched the shell of the two appliances, between the two hands will form a potential difference, if the potential difference exceeds the human body can withstand the safety voltage, there will be a risk of electric shock.
In order to avoid this situation, in the permissible range, the exposed conductive part of all electrical appliances, with the conductor connected together, so that all the electrical appliances outside the equal potential, that is, equipotential connection. It is divided into total equipotential connection and auxiliary equipotential connection, auxiliary equipotential connection is equivalent to a range of small equipotential box, the range of electrical appliances are connected to the small box, that is, the auxiliary equipotential connection; other areas of the same connected to other areas of the small box, are connected, and then a small box are connected to the total box, that is, the total equipotential connection. Home is generally only a bathroom auxiliary equipotential connection, unless your home has a villa, may set up more auxiliary potential box.
Two, the role of the bathroom equipotential
Why the bathroom to install equipotential it? It is because the bathroom is a frequent area of electric shock accidents, due to the humid conditions, people in the bath electrocution chances will skyrocket. Bathroom appeared potential difference, even though but a dozen volts, can cause electric shock fatal accident. So in the whole equivalent of the leakage accident, the probability of death in the bathroom to greatly increase. The state has long been stipulated: the bathroom must be installed equipotential.
Like the bathroom shower, toilet, plumbing, bathtub, sink and so on as long as the metal surface is exposed. Easy to leakage parts are required to be connected to the equipotential, which can play a good role in preventing electric shock, lightning. When the potential is equivalent, there is no voltage, there is no current.
Some people say that the existence of equipotential, as opposed to being a "grounding wire". Used to achieve zero potential difference between the charged conductor and the human body, to protect people from accidental electric shock. But in fact they are fundamental differences, although they are electrical safety measures, equipotential is the conductive part of the equipment device for electrical connection, so that the potential difference is zero. And grounding is the shell of electrical equipment and ground connection, when the equipment failure to reduce the potential difference to ground.
Three, which facilities need to be linked to the equipotential?
1, metal enamel tub and metal piping should be local equipotential connection;
2, shower for the metal piping should be local equipotential connection;
3, washbasin under the metal elbow and metal drain pipe connected to the local equipotential connection;
4, washbasin metal bracket embedded parts and concrete Wall reinforcement connected to the metal bracket should be equipotential connection;
5, metal drainage riser should be local equipotential connection.
Four, if there is no equipotential, how to do?
1, before taking a bath, unplug all the electrical appliances in the bathroom, to be restored after the bathroom is dry.
2, the bathroom less installed less use of household appliances.
3, the choice of electric heaters with water storage, do not use instant electric heaters. Bath unplugged.
4, in the process of bathing, such as the need to contact the bathroom metal faucet and pipeline, you can first use the back of the hand slightly touch, such as electric shock and numbness, you should leave the bathroom as soon as possible.
5, such as the occurrence of electrocution, the rescuer can not enter the bathroom and the struck contact, should immediately cut off the main power supply of the residence, before rescue.
After reading the above introduction, do you think the installation of equipotential is necessary? I think it is necessary, equipotential installation is completely responsible for their lives! Never remove it for aesthetic reasons or discard it to save money! All in all, it is definitely not advisable to remove the equipotential bonding terminal box. For our safety, in the renovation of the bathroom, must supervise the decoration workers, never let them speak equipotential interconnecting terminal box to demolition, it is best to connect the bathroom can be connected to the metal objects are connected.