TD28 equipotential connection terminal box
An overview of the
Equipotential terminal box is the main buildings protection, water gas metal pipes, heating and refrigeration, cooling system, building hardware parts such as joint, in order to meet the specification requirements of the protection against electric shock electrical contact voltage less than 50 v. Is an important part of modern building electrical, widely application of high-rise buildings.
role
1. The total effects of equipotential connection, is to reduce the building indirect contact the contact voltage of electric shocks and the potential difference between different metal parts, and eliminate the foreign economical electrical wiring all kinds of metal ducts introduced the harm of dangerous breakdown voltage, building each power supply into line should do total equipotential connection, the connection terminal board should be interlocking is same.
2. Assist effects of equipotential connection: the two conductive parts make equipotential connection with wire directly, make fault contact voltage drop to the contact voltage limit. Power network impedance, make automatic cut off power supply time is too long, cannot satisfy the requirement of electric shock; In order to meet the bathroom, swimming pool, hospital operating room and so on the special requirements of protection against electric shock; Since the TN system the same distributor supply stationary and mobile two kinds of electrical equipment, and stationary equipment protection appliances to cut off the power of time can't meet the requirement of electric shock.
3. Partial equipotential: when should be within the scope of a local places do various auxiliary equipotential tends to implement, can through the local equipotential connection terminal board unicom each other of the following part, easy to realize the local scope of multiple auxiliary equipotential connection, referred to as local equipotential connection, etc.
Application Suggestions
1. Can't seal inside the walls;
2. Can't use ceramics block;
3. Do not give up
The specific practices
Inside the toilet will be all kinds of metal pipes, structure (including in reinforced concrete floor) and came to the attention of inside toilet, with no less than 4 was the copper wire, through the equipotential connection terminal box connected with each other. As shown in figure 3. Equipotential connection wire going to wear on the floor or wall dark apply plastic pipe protection, its purpose is to replace the conductor is convenient. Equipotential connection within the scope of the metal pipe and other metal body and equipotential connection box resistance between terminal row should not be greater than 5. Inside toilet metal pipe joints are generally do not need to add a jumper, if discover the conduction, it should be a jumper. When the water pipe is plastic tube inside toilet or plastic coated metal, such as potential jumper can pick up on the water taps; Use a metal pipe, the jumper directly on the pipe. Between the sewage pipe in the bathroom with the inlet pipe is blocked, so the sewage pipe will be equipotential connection, etc, and also can pick up on the floor drain pipe.
Product name: equipotential connection terminal box
Product model: TD - 28
size
Product model
Product model
Body size
Overall dimensions
The potential of small
TD28 -i
155 x 75 x 50
Medium voltage
TD28 - D
180 * 100 * 100
Big equipotential
TD28 - III
300 * 200 * 200
Total equipotential
TD28-1 b
260 * 360 * 360
The characteristics of description:
Bottom box is made of high quality manufacture materials, and through six phosphating process, the surface coating, has good resistance to oxidation and corrosion function.
Bottom case chewing double flanged edges is greater than or equal to 7 mm, significantly improve the strength of casing, durable, compressive strength.
Panel is made of high quality manufacture materials, and through six phosphating process, the surface coating, has good resistance to oxidation and corrosion function.
Equipotential terminal board for 20 * 2.5 mm brass material, nickel plated surface, the ground effect is good.
Equipotential terminal board is equipped with a 2 mm thick steel clamp, spinning the screws on the clamp to roof pressure pressed flat.
Grounding flat steel access box by the maximum width can be up to 25 to 30 mm
Grounding flat steel from bottom box up and down or so either side access equipotential terminal board.
Bottom case material: 0.4, 0.5, 0.6, 0.7, 08., 1.0 mm high quality manufacture
Panel material: 0.4, 0.5, 0.6, 0.7, 08., 1.0 mm high quality manufacture
Appearance: gray white (optional)
Installation method: embedded in the wall.
Open the door way: remove the screw open.
Protection grade: IP40.
Conform to the standard: GB17466.24 GB17466.1-2008-2008.
Join the scope: single core cables) less than or equal to 6 mm square; (multicore cable) less than or equal to 35 mm square; (grounding flat steel) less than or equal to 25 to 30 * 4 mm square.
Special note: special requirements and unconventional size can be customized according to customer requirements.