What is a box, where is it applicable?

The organization of electric wiring is a troublesome and responsible business. With electricity, people do not joke, and such work is trusted by professionals. But when a special cable box appeared, this question was simplified. Now there is no need to use special metal staples, and the laid wire is not visible.

The box, its device

What is a box? It is a universal wire holder hiding them inside. Visually, it is a straight line with possible branches at 90 degrees. Boxes are made of polymers or metal. The main requirements for these elements are:

• Non-exposure to fire;
• Aesthetic appeal;
• Convenience of installation;
• cheapness.

Any element of the box, let it be a channel, or a corner or a tap, is made of two parts: the base and the lid. The base is fixed with screws through special fastening holes to the supporting surface. In it lay the wire. The lid is fixed from above by means of a special latch, covering the wiring. The channels are produced mainly two-meter long and rectangular cross-sections of different sizes.

Convenience and scope

What is a box in operation? It provides:

• Fast and inexpensive installation;
• Safe laying of electricity in places with flammable materials;
• Convenience of access to current-carrying and signal lines;
• The possibility of installation on a finished finish without disturbing the decorative layer;
• Ease of network reorganization.

The need for boxes is often due to the installation of additional equipment in the room or equipping the entire building with it. Such equipment includes fire safety, video surveillance and security alarm systems, as well as acoustics.

Features of plastic channels

What is a polymer box? It is made of fireproof polyvinylchloride (PVC). The most common - gray and white shades, but there are also colored, painted under the structure of wood. Channels are of the following types:

• Walls for wiring on walls and ceilings;
• Floor;
• A skirting board. In the plinth there is a channel covered by a decorative panel.

Plastic channels are designed for internal use. For the convenience of cable routing in some types of boxes there are dividing sections. In each separate section it is possible to lay wires of a certain purpose. When laying the wiring, follow these rules:

• Use a minimum of electrical connections inside the channel;
• Do not allow twisting of wires and packing by rings;
• Leave space for additional communications;
• Do not occupy more than 50% of the cross-section so that the cables do not overheat;
• Arrange wiring in those places where there is quick access to the channel;
• Additionally fix the tourniquet in plastic, especially on long straight sections, at turning points and branches.

Metal current boxes

What is a metal box? This is a kind of channel that is used both indoors and outdoors. Elements are resistant to positive and negative temperatures and ultraviolet. Can serve as a screen for signal wires. The material of the box is steel or aluminum. The design represents the base and the lid. The metal box meets fire safety standards. They can easily be grounded, which creates protection against breakdowns.

In the market there are boxes of perforated and solid construction, to which there are angular joints and bends. Also there are wire metal trays, which have the lightest construction. Wires in a metal box are laid:

• In one row;
• Multilayered way;
• Harnesses;
• Packages.

When organizing wiring in a metal box in the street in winter, it must be remembered that the cables must be heated before laying if the temperature is below 15 ° C. When on the street -40 Сº, installation work can not be carried out.

Speaker box

Boxes of this type have nothing to do with cable laying. Simply put, the subwoofer box is the case where the subwoofer is installed . The size and shape of the box is calculated according to the formula according to the acoustics parameters. A properly crafted subwoofer can deliver rich deep bass. There are three types of boxes:

• Sealed construction. Easy to manufacture and reliable housing. The membrane of the dynamics in it is supported by the volume of the internal air. This makes acoustics less prone to wear.
• Bass reflex system. The box is equipped with a special ventilation channel, due to which receive stronger basses with low power of the speaker. Precisely manufactured body gives a good clean sound, but at all positive moments, such boxes have a larger volume for a particular speaker in comparison with the hermetic ones.
• Bandpass. Combining the above two systems. The device design allows you to get an excellent bass. But acoustic output is inferior to other types of cases.

Traditionally, the material used to make the box is plywood or chipboard.