Perforated box: purpose, assembly

There are many ways to organize the posting. It is not necessary for this to carry out labor-intensive measures, such as, for example, wall slashing. The modern industry of plastic products offers affordable and convenient electrical installation boxes.

Box perforated

Boxes of plastic with a perforated surface, usually used as organizers for cables. This is convenient for wiring in control boxes, hanging type ceilings, in all places hidden from attention, when there is a need to adjust the electrical wiring routes or signal wires similar in type or appearance. This task is easily achieved due to the fact that the perforated baffle box has special flat holes for branching the wires along its entire length. These holes are at a certain distance from each other, called the step. The pitch is 1 cm, 1.2 cm and 2 cm.

The form in which the perforated box is made has a rectangular configuration and, by analogy with conventional plastic boxes, contains a lid on the latches. However, there are no additional connection elements, such as corners and jumpers. There is only an element of fixing the cable inside the box. Also, there is a version of a box with a circular section without a cover. This is a series of flexible plastic perforated trays.

Although the color gamut of products is rather poor and is limited only by gray and blue tones, the price of a box of this type is higher than the usual continuous one. This is due to the more complex manufacturing process, as well as the fact that the perforated box has several advantages:

• Is made of plastic, the viscosity of which allows it to be bent and subjected to mechanical stresses during the assembly phase without the risk of deformation of the mold;
• A convenient rounded shape of the teeth on the side surface makes it easy to insert wires between them;
• Extra teeth easily break out thanks to a special treatment of the sidewall with a laser;
• PVC plastic material includes components that contribute to attenuation in case of a fire box.

When the height of the box is equal to or greater than 8 cm, the teeth are complemented by special restrictors, which allow the wires to be taken out by two sections. Often a perforated box is made with a base, the width of which is much smaller than the height of the side wall. This must be taken into account when calculating the highway.

Installation of a box

Since the perforated gray box is an element that performs the carrier function of the power system and in fact secures the cable, that is, some requirements for its installation:

• The installation is only permissible for threaded fasteners;
• Height of laying the channel relative to the floor is not less than 2 meters;
• At the intersection of the tray and the pipeline, the distance between them should not be less than 5.0 cm, with a parallel passage of 10.0 cm;
• Distance to the gas pipeline, heating main not less than 25.0 cm.

Conclusion

Laying of all current-carrying elements and their channels should be carried out by professionals with the appropriate admission to work. It must be remembered that plastic boxes under the cable can be laid for current-carrying elements, whose voltage does not exceed 1000 V.