Difficult temperature conditions in the room impose conditions on all devices and electrical networks. At high temperatures and a high level of humidity, the risk of destruction of wires and cables increases. For work in saunas, baths, pools, heat-resistant conductors of special purpose are used, among which is RKGM.
Abbreviation and Specifications
Heat-resistant cable is a type of cable product that is characterized by a high degree of resistance to negative factors. A feature of products of this type is the presence of additional insulation from non-combustible material. They are single-wire and multi-wire. The former are more rigid, inflexible. They should be laid with the least number of fasteners. The resistance is reduced when working at low frequencies. Stranded are suitable for installation with a large number of bends and turns. A variety of such cables with a multiwire structure is the conductor of the RKGM.
Heat-resistant wire RKGM is designed for networks with voltage up to 660 V. The main characteristics can be found in the description of the name. The marking is decoded in the traditional way for wires:
- The core material is copper, since the letter A is missing at the beginning of the marking.
- RK - silicone rubber insulation.
- G - flexible.
- M - fiberglass outer braid. It is in addition impregnated with heat-resistant varnish and enamel.
The letter code is followed by a number. It shows what sectional area a given conductor has. Depending on this indicator, the cable can pass a current of different magnitude.
The wire is unarmored. Technical characteristics of RKGM:
- The working alternating voltage is 180, 220, 380 and 660 Volts.
- 4 class of flexibility.
- Stranded wire.
- Cross section - from 0.75 sq. Mm. up to 120 sq. mm.
- The minimum bending radius is 2 diameters.
- It works at 100% humidity. The temperature in this case should not be higher than 35 ° C.
- Operating frequency up to 400 Hz.
- It can operate at a pressure of 130 Pa (1 mmHg) to 294 kPa.
- Operating temperature range from -60 ° С to + 180 ° С.
- The minimum gasket temperature is 15 ° C.
- It has been operating for 8 years subject to operating conditions.
- Resistance to burning.
- Possibility of installation in conditions of the formation of fungi, mold.
- Resistance to vibrations.
Available in different diameters and weights. Sold in bays 100 and 200 meters long.
During installation, allow multiple bending of the conductor (about 15 times) without damaging it.
What is RKGM
Mandatory elements of the cable RKGM are:
- Insulation. This layer is located above the vein. Made of silicone rubber. The thickness of the insulating layer depends on the operating voltage for which the conductor is designed. Increases with increasing load.
- Outer shell. It is a braid made of fiberglass threads with special impregnation with KO-921 varnish. Gives increased strength and flexibility to the product.
The use of insulation and an outer sheath makes the RKGM cable reliable and allows its use in difficult climatic conditions.
Application area
In everyday life and industry work machines based on electromagnetic induction. During switching, the contact points become very hot, which can damage the normal wire. RKGM cables are designed so that destruction does not occur even at large temperature differences.
Since the wire is heat-resistant, it is usually used in places with high temperature. Due to its characteristics, the conductor is used in the following conditions:
- Installation of electrical circuits in rooms and on the street in a temperate climate.
- Creating windings in powerful equipment.
- Use in the chemical industry.
- Housing construction. Creating a lighting group, connecting household appliances and outlets in rooms with high temperatures and humidity.
- Installation in areas with a high risk of mold and mildew.
In everyday life, RKGM is used in baths, saunas, and rooms with high temperatures. It is actively used in bathrooms and basements. Using the heat-resistant wire RKGM 2.5, you can also connect electric stoves, ovens and other powerful equipment in the kitchen or in the bathroom.
The conductor is not suitable for operation in low temperatures. The casing has low resistance to cold conditions, so you should choose other cable products.
RKGM wire manufacturers
RKGM cable production is carried out by many factories of electromechanical products. The following enterprises produce the highest quality in accordance with GOST and common products:
- Uralcable.
- Camcable.
- Rybinskkabel.
Manufacturers are required to produce cable in accordance with TU16.K80-09-90 specifications.
Varieties of conductors
The RKGM cable is available for different operating frequencies, with different cross-sections and, accordingly, different parameters. The main varieties of the conductor:
- RKGM-0.5. 0.5 sq. Mm. Is a section of a wire. It operates at a frequency of up to 400 Hz.
- RKGM-16. Section 16 sq. Mm. Application conditions - from -70 ° С to + 190 ° С with a frequency of up to 400 Hz. Do not use in an aggressive environment.
- RKGM-50. The cross-section is 50 sq. Mm., The main use is electrical units with a pressure of 1.4 kPa to 295 kPa. Temperature range from + 60 ° С to + 180 ° С.
- RKGM-95. Designed for use only at a voltage of 660V and a frequency of 400Hz. Average temperatures of use are 25-35 ° С.
- RKGM-150. The largest product used at a voltage of 380-660 V and frequencies of 100-400 Hz. It can be installed at temperatures from + 15 ° С to + 30 ° С. Operating pressure from 1 kPa to 300 kPa.
Flexibility class and properties are also determined by the number of conductive cores.
Installation Recommendations
In order for the conductor to operate efficiently and reliably during the declared period, the operating requirements must be observed. When laying, take into account the following rules:
- Turn the cable line only at right angles.
- Vertical and horizontal installation possible.
- It is undesirable to allow cables to cross.
- The optimum distance between the cable and the heating pipe is 3 cm or more.
- The distance to windows or doors is at least 10 cm.
Installation is possible both open and hidden. With an open installation, the wires can be laid in channels, corrugated pipes, rigid frame pipes, metal sleeves with a braid. Closed wiring is more complex. The master is obliged to comply with all requirements and recommendations that are regulated by technical conditions. Air laying of conductors is also possible. It is suitable for false ceilings and under floor coverings.
Before installation, the wires must be checked. There should not be kinks, violation of isolation, bare sections. Using the indicator, cables are tested before and after installation.
