Copper wire and cable brands
Advantages and disadvantages of copper
In electrical wiring in private homes and apartments, copper wires and cables are currently used. Aluminum cables section below 16 square meters. mm prohibited PUE. Let's look at the pros and cons of wires and cables with copper conductors.
- The cores withstand repeated bending, which increases the maintainability of the wiring, you can easily unwind the old twist and twist again by adding a wire there, for example. In such a situation, aluminum may not even unwind and burst.
- Copper cables of any cross-section are also made with soft flexible stranded conductors. This makes it possible to use them to connect mobile consumers, such as an iron or hairdryer, and other electrical appliances. Such cables with aluminum conductors simply do not exist.
- The copper resistance is almost 2 times less than that of aluminum. This means that with the same cross section, copper can withstand more current than aluminum.
- Copper is harder than aluminum. Therefore, it has less fluidity, and when you connect the wire to the screw terminal, you get a better contact.
- Copper does not oxidize. Rather, it oxidizes, but very slowly, unlike aluminum.
- The main disadvantage of copper is that its cost is up to two times more expensive than aluminum.
- The weight of the copper wire is twice that of aluminum. So you need to install more supports when laying the cable through the air, and their design must withstand heavier conductors.
Copper Wire Grades
PVA - copper wire in vinyl double insulation. Outside it has a rounded shape, the shell is applied with the filling of the inter-core space. The number of cores is from 2 to 5. The cross-sectional area is from 0.5 to 25 square meters. mm Rated voltage up to 660 V, at a frequency of 50 Hz. It can be used for home wiring, but it is recommended to use it as a wire for connecting mobile electrical equipment, it is flexible enough and has a thick insulation layer.
PUNP (PUGNP) - wires of these brands are prohibited for use in electrical wiring, for reasons of non-compliance with PUE standards (insulation thickness). However, it is present on the market and is sold cheaper than analogs, for not very responsible chains and temporary buildings it is quite acceptable. The maximum voltage is 450 V AC 50 Hz, 1000 V DC. PUNP has a monolithic single-wire core, and PUGNP multi-wire flexible minimum of 7 wires. The core material is copper.PVC insulation. The number of cores is from 2 to 3, and the cross-sectional area is from 0.35 to 6 square meters. mm for two-core and up to 4 square meters. mm for a three-wire wire.
RKGM - heat resistant wire. It can be used to output the ends of the windings of electric motors, connect the power to heating devices, electric stoves, irons and other things. It consists of a copper core in rubber insulation, coated with heat-resistant fiberglass, to increase resistance to temperature, it is impregnated with silicone varnish and enamel. The rated voltage is 660 V. The number of cores is 1, the cross-sectional range is from 0.75 to 120 sq. mm
Ball screw - not a wire, but a cord with two layers of vinyl insulation. The shell is flat in shape, close to rectangular. It can be used to connect electrical equipment in 220/380 V. circuits. Number of cores 2 or 3. Cross-section range from 0.35 to 2.5 sq. mm Rated voltage 220/380 V 50 Hz.
PV-1,2,3,4 - installation wire, suitable for connecting power and lighting circuits, assembling internal circuits of devices, electrical panels. PV-1 consists of a monolithic copper core and vinyl insulation. The wire is hard. PV-3 and PV-4 consist of one multi-wire core and a layer of vinyl insulation, differ in flexibility class - 3.4 and 4.5 classes, respectively. She bends easily. An option with rubber insulation is called PR.
M-10 - Copper wire without insulation, which is used in overhead lines of high voltage power lines. Consists of twisted copper wires.
Copper cable brands
VVG - one of the most common types cables for electrical wiring in apartments, in production. Used for stationary connection to the mains of any electrical equipment. Rated voltage and frequency 0.66 kV 50 Hz. It consists of a single-wire copper core coated with double vinyl insulation - individually on each core and common sheath. The number of cores can be from 1 to 5, in the range of sections from 1.5 to 300 square meters. mm Suitable for use in apartments and private houses in indoor and outdoor installation. Installed on power wiring, outlet groups and lighting circuits. This brand of cable can be used for entry into the house, as well as for street lines. In a wooden house use an improved version (non-combustible) - VVGng.
NYM - It is considered a foreign analogue of the VVG brand. The number of cores is from 2 to 5. The insulating layer is PVC, the filling of non-combustible material is unvulcanized rubber compound, the shell is also made of PVC. The cores in the cable are twisted into coils. Designed to work in networks with voltages up to 0.66 kV. Under the influence of direct sunlight, operation is not recommended, in which case it is necessary to use corrugated pipes, metal pipes, or cable channels.
KG - the cable is flexible. This brand is used to connect the electrode holder to the welding machine, due to its flexibility the welder is comfortable to work with. Also used as a flexible overhead line on cranes and beam cranes. The number of cores is from 1 to 5. It is produced in the cross-sectional range from 1 to 240 sq. mm
PvPg - a high-voltage copper cable with insulation of conductors made of cross-linked polyethylene, on top of which there is a screen, the sheath is also made of polyethylene. It can be laid underground, at the bottom of ponds. Used in networks of 6 kV and 10 kV. The number of cores is 1, its cross section is from 50 to 800 square meters. mm
DSPG, depending on the index, can be used for 6, 10 kV networks. This is a copper cable in paper insulation. Veins can be single-wire in the range of sections from 25 to 50 sq. mm, then in the name there is a note “ОЖ”. In the range of sections 25-240 square meters. mm multi-wire conductors. The paper insulation is impregnated with a viscous or non-draining composition, which allows the use of cable on vertical sections of the route. Belt insulation is also paper. There is a lead sheath, a bituminous pillow, steel wire armor.
PVVNG (A) -LS - at the end of the name there is an index of 10, 20, 35, which corresponds to the number of kW in the network for which it is intended.Copper cable with polyethylene insulation. The number of cores is 1 or 3. On top of the cores is a screen made of conductive material based on polyethylene, followed by electrically conductive paper or a conductive polymer tape, over which, twisted from copper wire. In three-core cables, the interfacial distance is filled with a PVC layer of reduced fire hazard, the sheath is made of the same material. Also suitable for laying in the ground and at the bottom of ponds. It can be used, for example, for distribution networks.
Copper wires and cables come in various brands. Each of them is designed for specific tasks. It combines their material from which they are made and its features. And the issues of choosing cable products during repair and construction should be approached responsibly. Indeed, not only the reliability of energy supply, but also the safety of life depends on this.