Wires and cables refer to conductors of electric current, enclosed in a sheath made of dielectric polymer materials. A large assortment of conductors is supplied to the consumer market, the type and type of which are determined by the purpose, operating conditions, design, cross-section and number of cores. One of the products in demand is a heat-resistant cable designed for use in places with increased temperature load.
Content
- Power wire design
- Scope of the cable
- Bath wire
- Stranded cable MVV
Power wire design
The insulation jacket for the electrical wiring harness is made of dielectric heat-resistant components. The positive qualities of a heat-resistant wire or cable include the following indicators:
- preservation of properties at high temperatures;
- mechanical strength;
- rust resistance;
- the ability to operate in an aggressive environment;
- incombustibility;
- safety during operation.
Due to the environmental safety of the polymer, heat-resistant wiring can be used to supply power to equipment and premises for medical and food purposes.
The silicone elastic shell ensures the functionality of the wiring for 10 years, even in an area with sharp changes in ambient temperature. In places where there is a threat of mechanical stress, it is recommended to use a cable in a metal sheath or hidden in a metal-plastic pipe.
Scope of the cable
The heat-resistant cable is available on the market in several varieties, the technical characteristics of which are determined by the state standard. The area of operation of the product has an expanded scope:
- industrial and production facilities;
- saunas;
- electric furnaces;
- baths;
- infrared installations;
- drying cabinets;
- hot shops;
- infrared soldering cabinets;
- heating equipment.
It is recommended to select a specific cable model in accordance with the operating conditions, installation method and workload.
Different types of product differ in power, number of cores, cross-section and frost resistance. The product is manufactured according to TU or GOST.
Before giving preference to one of the cable models, it is recommended to calculate the power for all points that consume electricity. For example, for a lighting system device, a wire power of up to 2 kW is sufficient; for a sauna stove operating on electric current, a 10 kW cable is required. All power lines must be equipped with emergency shutdown devices.
It is best to buy electrical appliances, switches, sockets or heat-resistant cables in a specialized store. All goods sold through a licensed outlet are checked for quality and safety, and are equipped with a certificate of compliance with the requirements of the state standard. Managers will help you choose a product and choose an installation scheme, but it is recommended to invite professional electrician.
Heat-resistant cable can be laid open or closed (under protective structures). According to the conditions of GOST, electrical wiring must not be laid in corrugated or metal tubes that are prone to rusting from moisture.
In order to avoid short circuits, switches and sockets are recommended to be located outside a room with high air humidity.
Bath wire
When equipping a private bath, it is recommended to use heat-resistant RKGM wire with silicone insulation and fiberglass braid. The design can withstand temperatures up to +1850C and air humidity up to 100%. The unique qualities of the wire include:
- long service life (up to 8 years);
- operating voltage 660 V;
- bending radius - 2.
In the process of arranging the lighting system in the steam room, experts recommend using a cable of the RKGM 1 * 2.5 brand, capable of withstanding high temperature and humidity. The product performance of the domestic industry is ensured by silicon rubber insulated copper conductor. The main purpose of the wire is a power supply outlet device in conditions that do not allow contact with industrial oils, acids, salts and alkalis.
The important factors of working material with insulation impregnation with heat-resistant varnish include resistance to exposure to ultraviolet radiation, open flame, mold, weather conditions, mechanical and dynamic loads. Markingpopular heat-resistant wire reflects the following indicators:
- Р - rubber insulation;
- K - organosilicon (silicone) material;
- Г - unarmored flexible wire;
- M - fiberglass winding.
The main structural element is a copper multi-wire conductor of the 5th class of flexibility, hidden in a polymer sheath.
Fiberglass and silicone do not absorb moisture, are not destroyed by temperature changes, do not burn, do not smoke or melt on contact with an open fire. Insulation is not subject to bacterial, mechanical, radiation and chemical destruction, wire operation at low temperatures can lead to cracking of the protective coating and a short circuit in the electrical chains.
Stranded cable MVV
A single-core heat-resistant wire up to 500 degrees for cartridge and clamp elements of the heating type contains in the structure nickel conductor, mica winding and several layers of insulating materials made of PVC compound with heat resistant impregnation.
Distinctive qualities of a heat-resistant wire is the ability to operate at ambient temperatures ranging from -600From up to +5000C at rated supply voltage up to 500 V. Due to its high technical characteristics, MVV wire (or ship cable) is recommended for the line device power transmissions on sea and river vessels, laying of signaling systems, lighting and control of floating means.
Electrical wiring can withstand operating loads up to 690 V with an operating voltage of 1200 V and a frequency of 400 Hz in an electromagnetic environment. When installing the wiring, bends are allowed, the protective sheath does not react to UFOs, acids, industrial oils, condensate of alkalis and sea water. The average service life of the wire is 25 years.
