What are the brands of heat-resistant wires and cables
In the design of electrical wiring, the main task that an engineer faces is to ensure reliable, uninterrupted operation of the system in a particular room. Amateurs find it difficult to choose a wire for a bath, sauna, boiler room - in general, in various hot rooms or electrical appliances, which are very hot during operation. In this article we will talk about what heat-resistant wires and cables exist, and also briefly consider the features of each version of the conductor.
Marking RKGM, stands for:
- RK - the insulation is made of silicone rubber;
- G - naked, copper;
- M - braid made of fiberglass impregnated with silicone varnish and enamel.
A distinctive feature of this type of heat-resistant wire is a very flexible copper core with a flexibility class of at least 4 and an allowable working temperature. RKGM It works in the temperature range from -60 to +180 degrees. It is resistant to burning. This wire is always single-core, often 2 or 3 of these wires are used for laying lighting in the steam room of baths and saunas, for electric stoves.
Decoding PAL brand wire:
- P - wire;
- A - asbestos;
- L - lacquer.
It always consists of a single copper multi-wire core in asbestos insulation, which is impregnated with silicone varnish. The flexibility class is from 3 to 4. It is resistant to abrasion, and most importantly - it is heat-resistant. PAL can withstand prolonged exposure to temperatures up to 300 degrees Celsius (up to 3000 hours), but it should be remembered that dangerous toxins begin to be released already over 200-250 degrees. Moreover, it stably tolerates the effects of gasoline, toluene and other types of fuel and lubricants.
This conductor is used for electric furnaces and other installations with high operating temperatures.
The PRKA marking tells us that it is:
- P - wire;
- RK - with isolation from silicone rubber;
- A - increased hardness.
He has one stranded copper core. The shell is impregnated with an antiseptic composition, it does not spread combustion, emits a small amount of gas and smoke, is resistant to fungus, and also does not contain halogens. Exposure to ultraviolet radiation is normal. Works wire PRKA in the temperature range from -60 to +180 degrees Celsius.
It is used for the installation of heating installations, electric motors, wiring in drying chambers, etc.
When operating electric machines, several harmful factors arise. There is an increased level of temperature and vibration. Specially for this purpose, a single-core heat-resistant PVC-wire type has been developed, its marking is deciphered as follows:
- P - wire;
- In - for the conclusions of electrical machines;
- KV - insulation is made in two layers of silicone rubber.
PVKV brand is resistant to vibration, bends well.It works in the temperature range up to 180 degrees Celsius, and its resistance to high humidity allows it to be used not only for electric machines, but also for connecting lamps in bathhouses.
The first heat-resistant cable in our list with more than 1 core. PNBS can consist of 2-5 stranded conductive conductors. Its insulation is made of organosilicon rubber, and the shell is of fluorosiloxane. The product is designed for fixed connection of electrical appliances in rooms with temperatures up to 150 degrees Celsius. Used for wiring and connecting heaters, electric furnaces and more. Heat-resistant insulation allows you to connect the wire directly to the heating elements, which is unacceptable, for example, for cable products in rubber or vinyl sheaths.
Mounting heat-resistant wire in an organosilicon shell with a copper multi-wire core - this is the abbreviation for PMTK, one of the varieties of heat-resistant conductor. By the way, the veins can be more than 1. The product is resistant to ultraviolet radiation, cold and heat. The characteristics allow the use at 100% humidity and temperatures in the range from -60 to + 200 ° C. PMTK does not spread combustion during a single installation.
The flexible PRKS copper cable in silicone insulation withstands temperatures from -60 to + 180 ° C. May contain from 2 to 5 cores. When heated or exposed to fire, it does not emit toxins and does not deform when the temperature changes. It is also worth noting that its shell stably tolerates the effects of oils and gasoline.
All this also allows the use of PRKS to connect powerful electrical appliances to the mains supply in hot rooms, as well as to power powerful heaters.
We examined the main brands of heat-resistant cables and wires, as well as their characteristics. All products can be used in the bath and other purposes for which the wiring will be operated at elevated temperatures. Nowadays, the most popular is the use of such conductors for laying backlight power in a bath, for example, for LED strip or ordinary lamps. The connection of electric furnaces with powerful heaters must also be carried out by a heat-resistant cable, the insulation of which cannot be melted from the immediate vicinity of the heating source, otherwise short circuits and other troubles are possible.
Finally, we recommend that you look at an overview of some brands that were on our list: