Junction box installation

Assembling the junction box

The junction box is the most important element of the power grid. Inside a small container, branching of wires from the supply cable is organized at individual points of consumption. Here you can order the installation of a junction box in Tallinn at the best prices.

Views

In everyday life, the junction box can be called a wiring box, connecting or mounting. She protects "stuffing" from dust, moisture and mechanical damage. Thanks to, that all contacts are hidden inside, the wiring looks neat. An electrical product is made of plastic or metal. On the case there are inputs and outputs for wires. From above it is closed with a lid, which, if necessary, can be removed to access contacts. Boxes can be round, rectangular, square. They are installed in an open or hidden way.. Maximum number of inputs - up to 20. Access is provided for repair and maintenance. But for installation under false ceilings or drywall finishing, boxes with no access are used, where the connection requirements are very serious. Boxes are produced as usual, and with dust protection, water, high temperatures. Products of German manufacturers of a new sample have filling in the form of terminal connections, which significantly speeds up the work on the installation of electrical wiring.

Where are installed

The best place to place the box is at a distance 20-30 cm from the ceiling. This area is safe, since it is only available for an adult, but not for children. In addition, the risk of damage to the structure, under the ceiling, very low. Before starting the wiring, you need to draw up a detailed drawing. Desirable, so that the connection points are as close as possible to the place of distribution of wires.

Nuances of junction box assembly

Modern wiring is carried out with a three-core wire. The veins are different colors:

white - phase;
blue - zero working conductor;
yellow-green - ground.

The lead wire is fed to the box from the shield. To make it more convenient to connect, each conductor is marked during installation. Before connection, the outer and inner cable insulation is removed, a few cm of wiring stock is left for future possible changes. To connect outlets and power lines, leading to home appliances, wires are connected according to color. For lighting fixtures and switches, the situation is somewhat different.:

neutral wires from luminaires are connected to blue, suitable from the flap;
a white phase wire is supplied to the switches;
the blue and yellow-green veins outgoing from it are connected to the phase, coming from the lamps.

Thus, the circuit breaker is always built into the phase and can trip it., and on luminaires in a de-energized state there is no phase. If there are many outlets in the room, lighting fixtures and stationary household appliances, it is advisable to install 2 and more junction boxes. This issue is resolved at the design stage of electrical wiring..

Connection methods

A well-made connection is safe, does not heat up and rarely requires maintenance. It provides the transmission of current, almost equal to one piece undamaged cable. The most common ways:

soldering - stripped contacts are welded to each other using solder;
welding - the twisting of wires in the box is scalded with an inverter welding machine;
crimping with sleeves - conductors are placed in a metal sheath, which is crimped with a special tool;
twisting - bare contacts are carefully insulated with electrical tape, heat shrink tubing, connecting insulating clamps (YOU);
on terminals - conductors are connected mechanically in sleeves made of insulating material.

Unsoldering wires is a responsible operation, which must be carried out strictly according to technology. Don't trust your life and property to unverified performers, not having permission and work experience. If you do not have the necessary knowledge and skills, in case of improper assembly, any troubles are possible, including short circuit and electric shock.