Experienced electricians know that conventional power cables cannot be connected to the output ends of electrical equipment with a voltage not exceeding 0.66 kV, otherwise an overload in the power supply network may occur. To avoid this, it is recommended to use cables and wires for special purposes. Today, a special product known as the RKGM wire is presented to the attention of professional electricians and amateurs. The article contains information about its technical characteristics and scope.
Meaning of the abbreviation RKGM
The wire is designated by an abbreviation, which stands for the following:
- The presence of the letter "P" indicates that the wire is equipped with rubber insulation.
- "K" - the insulation is of the organosilicon type.
- "G" - the product is unarmored and is characterized by high flexibility.
- "M" - in the manufacture of the outer braid for the wire, fiberglass impregnated with a mixture of heat-resistantsilicone varnish and enamel.
Since there is no letter “A” at the beginning of the abbreviation, indicating the presence of aluminum in the product, we can conclude that RKGM is a wire consisting entirely of copper conductors. Since this special-purpose product is represented by a wide range of modifications that have their own section, when buying, you should pay attention to both letter and digital markings. For example, the RKGM 2 5 wire is a cable with a cross section of 25 mm2. If necessary, you can choose a cable of almost any section. Their range varies from 0.75 to 120 mm2
Structure
The RKGM wire consists of the following elements:
- Outer braid containing fiberglass threads.
- Silicone rubber that acts as the main insulating layer. This rubber is the main feature of RKGM wires. The high popularity among consumers of special-purpose cables is explained by the fact that in ordinary wires at a temperature of already 120 degrees, rubber loses its insulating properties and becomes a conductor, which can be dangerous to humans. RKGM cables in this regard are very favorably distinguished, since their organosilicon rubber does not pass current even at 200 degrees.
- A stranded copper core that acts as a current-carrying part. It belongs to the fifth class of flexibility. There are six classes in total. The higher it is, the more flexible the cable has. This indicates thatthe current-carrying part is not a single whole, but is a bundle of individual wires twisted together. This design allows the cable to be kinked repeatedly. Mechanical and electrical properties are not lost at all.
Characteristics of the RKGM wire
- Cables are indispensable in a variety of situations. The great demand for them is explained by their ability to work effectively at temperatures from -60 to +180.
- Cables are flame retardant. If the RKGM wires are used in rooms with a very high temperature, which led to the melting of the insulation, toxic substances are not released at all. If the insulating layer is still burned out, the special-purpose cable will still perform its task for some time due to the silicon dioxide remaining on it. Please note that the dioxide layer is very fragile and breaks at the slightest touch.
- The maximum voltage that the RKGM wires can withstand is 660 volts.
Where is the cable used?
Special purpose wires apply:
- To install the electrical network on the street (in a temperate climate).
- In the chemical industry. This is possible due to the special rubber insulation, which is not affected by chemicals and ultraviolet radiation. Also, these cables are immune to mold and mildew.
- With the help of RKGM it is possible to produce special windings for variable machines andpowerful electrical installations.
The characteristics of the special-purpose wire RKGM allow it to be widely used in the arrangement of electrical networks in sunnahs and baths.
