Which wire is best to choose for quality of the electrical assembly
Elektroshchit - is the "heart" of any network, starting from the simplest household wiring to complex control node in a large enterprise. Therefore, the quality of the installation and components depends on how secure is your network. In this article, we will talk with you about what is preferable to use a wire for binding within the panel. So, let's begin.
the electrical device
First, let's briefly go over the basic elements that are typically installed in a switchboard. So, in the panel, you can see the following items:
1. Electricity meter.
2. Circuit breakers. Introductory and automatic machines of certain groups of consumers.
3. RCD and (or) the differential machines.
4. All kinds of relays. Time switch, voltage, phase control, etc.
5. Different equipment.
As you can see the electrical panel (to be grounded) has quite a rich stuffing, and all these elements must be linked to the rest of the system reliable and high-quality wire.
What should be the lead
The use of aluminum wire inside the switchboard is unacceptable.
Since during mounting have to bend the wire (because of a dense arrangement of parts), then using the aluminum is more likely to break the core. A modern aluminum wire can withstand only a few kinks.
Therefore, in the control panel it is highly desirable to use copper conductors only.
Copper wires differ by type of living, they are single-wired (monolithic core) and stranded. And both kinds is quite possible to conduct the installation, but it has its own nuances.
Single cores
Lead single wire installation is quite simple, because the stripped insulation from the ends can be directly inserted into the screw terminals. The only inconvenience monozhilu section 4-6 square is difficult to bend.
stranded wire
With a flexible conductor to work much easier, but there also has its own peculiarity. Just clean up the vein and tighten it without a special treatment is prohibited. The stripped end of the flexible conductor it is necessary to pressurize the tip, e.g. NSHVI or NSHVI-2. And the compression end of tightening in the screw clamp switching devices.
It is also allowed tinning stranded, but I personally do not recommend to use this method, because if the machine will proceed through the substantial load, when insufficient tightening of the clamping screw can be warmed up and the solder flow out, leading to a weakening of the contact and further heating connection. And this is a direct road to machine damage and possible fire.
Based on the above it can be concluded that in order to perform the installation in the distribution board fit the following brands wires:
1. MF-1 (ELs). In this wire Single PVC insulation and monozhila first-class flexibility.
2. MF-3 (PuGV). In this conductor has a single stranded structure with PVC insulation. In this case section at from 0.5 to 1.5 square meters. millimeter in wires of the second class of insulation. When the cross section of from 2.5 to 4 mm2 in conductor 4 class flexibility, and when the cross section is greater than 4 mm2 third class flexibility.
3. PV-4 A single-stranded PVC insulated. This conductor has a flexible conductors flexibility class 4 and 5.
Cross sections selected in accordance with the calculated currents that will flow through the conductor.
Note. If you can not find the wire made in accordance with GOST or you have doubts about its real section and buy wire needed, it is better to buy a stock on the section. So if you needed a cable 4 mm2, buy a 6 mm2.
Just when the installation must comply with color-coded:
A jumper between groups of machines generally perform better via the connecting bus.
Its use provides a reliable contact, and installation will look neat and aesthetic.
conclusion
By following these recommendations, the switchgear installation will be carried out reliably and quality, and compliance with the standard labeling will facilitate the continued operation of any specialist.
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