SIP-4 wire is a self-supporting insulated conductor equipped with high quality aluminum conductive conductors. Light-stabilized cross-linked polyethylene is used as the main insulating layer.
The cross-section of the conductive conductors of this wire can be from 10 to 240 square mm, their number can be in the range from 1 to 4. It is allowed to use auxiliary conductive conductors of a smaller section together with the main ones, the so-called “four plus” wires, for example SIP-4 4×25 + 1×16; 4×35 + 1×25; 4×50 + 1×25; 4×50 + 1×35; 4×70 + 1×25; 4×70 + 1×35; 4×70 + 1×50; 4×95 + 1×50; 4×95 + 1×70; 4×120 + 1×70; 4×120 + 1×95; 4×150 + 1×95; 4×150 + 1×120; 4×185 + 1×120; 4×185 + 1×150; 4×240 + 1×150; 4×240 + 1×185.
More demanded nomenclatures in the SIP-4 wire, with a section of 2×16, 2×25, 4×16, 4×25, 4×35, 4×50, 4×70, 4×95, 4×120, the price of an SIP wire depends on two parameters – the section and the number of cores, since this is the main costly part in the production of conductor products.
What is SIP for? The main purpose of this conductor is the installation of power lines. The high popularity of the product is due to its excellent technical characteristics. Most often it is used when connecting individual consumers, premises and construction sites. In the process of building main energy-carrying lines, as well as branches from them.
Self-supporting insulated wires are especially popular among designers and installers, since they are more reliable, less susceptible to snow adhesion and ice formation, are characterized by lower transport losses of electricity, simplicity and ease of installation, the ability to connect overhead lines without disconnecting the power plant from the voltage and minimize the possibility of illegal connections.
This wire is decoded as follows:
S – self-supporting
I – isolated
P – wire
4 – type of design
SIP-4 is made of compacted aluminum wire with a twist pitch of up to 45 cm. The wire, as a rule, has 2-3-4 conductive stranded conductors of the same nominal cross-section, and also, in some cases (as mentioned above), an additional smaller conductor is added section.
The wire is mainly produced with a cross section of 16-120 mm2. In this case, if the nominal cross-section does not exceed 25 mm2, a right-sided twisting is used, for large sizes – a left-sided one.
All cores of the wire are insulated with thermoplastic light-stabilized black cross-linked polyethylene, resistant to ultraviolet radiation throughout the entire service life.
This insulation provides the cable with resistance to all types of atmospheric precipitation, as well as to significant and sharp changes in ambient temperature.
Application and installation of self-supporting insulated wire:
Power supply of end consumers (facility, living quarters), as well as lighting of various areas can be carried out using self-supporting insulated wires. One of the types of SIP, which is used for these purposes, is the SIP-4 wire in question. A feature of this type is the absence of a carrier zero core. This type of cable is used to equip branches from overhead power lines to transformer units. They can be used for the construction of lighting power grids or for laying on the walls of construction sites. The main technical properties of insulated electric wires provide the ability to operate in alternating current networks at 1000 Volts and 50 Hz.
How to choose a macro-sized wire cross-section for connecting to a house? If one phase is enough for a house, then a 2-wire SIP-4 wire is used, if three phases are needed then a 4-wire one. As for the cross-section, they usually choose a cable for the SIP street of 16 sq mm, since less is impossible, and more is not necessary, because the current strength of 60 A of the load for an average private house is quite enough. Thus, connecting 1 phase, you already know the answer to the question of what kind of SIP-4 2×16 wire is – this is exactly the brand that you need in this situation.
Despite the insulating coating, the self-supporting insulated wire is lightweight and can be independently connected to the input of the house without any problems. However, all actions must be coordinated with the relevant authorities.
Self-supporting insulated wire SIP-4 is laid vertically or horizontally along the walls of buildings and structures either in an open form or inside a corrugated pipe or box made of non-combustible plastic. In spans up to 25 m, the wire can be left hanging freely, for long distances it is necessary to install intermediate supports.
The procedure for connecting the wire input is as follows:
Before starting work, you need to calculate the length of the cable from the nearest support to the building. By calculating the total power consumption of all household appliances, the optimal cross-section of the conductors is selected. Usually 16 mm2 is enough for your own home.
If the distance between the building and the nearest support is more than 25 m, you will have to install an intermediate post at a distance of 10 m from the building and a tensioner. To connect the bushing to a common line, piercing clamps must be prepared. They will provide a tight, reliable contact without removing the insulation from the conductors.
The cable is fixed with anchor fasteners along the facade of the building, and a clamp is installed on the extreme hook. If the wall of the house is built of combustible materials, for example, wood, the self-supporting insulated wire must be additionally insulated with a corrugated sleeve. The self-supporting insulated wire is brought to a distribution board installed on the street. A copper cable will already go from the shield to the house.
When all the installation work in the house is completed, the cable is pulled onto the support, where it is fixed with fasteners. After that, it remains to connect the conductors of the input with the central line with piercing clamps.
Advantages and disadvantages of self-supporting insulated wires
– maintenance of cables in the process of use will always be cheaper;
– when transferring energy, SIP conductors provide stable parameters;
– thanks to the continuous insulating layer, reliability against short circuits with phases is ensured;
– when laying, you can use supports with a smaller diameter;
– ease of use in dense building conditions, is ensured by reducing the standard distances from cables to structures;
– fire safety for electricity consumers and employees of power grids;
– the technical features of the products make it possible to reduce the likelihood of losses during energy transmission;
– long service life of products;
– ease of installation on building facades;
– low costs for the arrangement of the power line.
Main technical characteristics:
Rated voltage: 0.6 / 1.0 kV;
Test voltage: 4 kV;
Ambient temperature during operation: -50 °C to + 50 °C;
Ambient temperature during installation: -20 °C;
Maximum wire temperature in operating mode: + 90 °C;
– in case of overload up to 8 hours a day: + 130 °C;
– with a short circuit lasting up to 5 seconds: + 250 °C;
– Bending radius during installation and installed on the wire supports – not less than 10 maximum outer diameters of the wire;
|Number and nominal cross-section of conductors, mm2||Outer wire diameter, mm||Estimated weight of 1 km of wire / 1kg||Nominal insulation thickness|
You can buy an aluminum self-supporting insulated wire SIP-4 by sending an application from the website of the Zaporozhye cable plant MPKA. Or call back for contact phone numbers. Also, if necessary, we carry out the production of a vulture wire, on order, of a special design that is not included in the usual list of the nomenclature.