A wide range of different conductive systems is available on the modern instrument market. Judging by customer reviews, SIP cable is in great demand. What is it, it is very well known primarily to electricians involved in the laying of transmission lines. Today, for the installation of electrical networks, instead of the old bare wires, their insulated analogues are used. According to experts, this installation is much simpler and safer if it uses a SIP cable. What it is? What is the product intended for? What characteristics does it have? The answers to these questions are contained in the article.
What is a SIP cable?
This conductive product relates to cable products. Especially for replacing bare wires, a SIP cable was developed. What it is is indicated in the product labeling.
How the acronym stands
The letters CIP indicate that in front of us is a self-supporting insulated wire. In addition to these three letters, there may be other prefixes in the abbreviation. For example, the symbol "A" indicates that this conductive product is with one core covered with insulation. The letter “H” at the end indicates that an aluminum alloy was used in the manufacture of the current-carrying core. If “T” is present, this means that the insulation coating in this cable is resistant to temperatures above 90 degrees.
About Labeling
The designation of phase conductors is carried out by extruding longitudinal stripes and numbers on the insulating coating. They can also be printed. Zero cores usually do not contain any designations. Also, letters and numbers can be replaced by a colored strip, the width of which is slightly more than 1 mm. For additional cores, the designations are provided: "B1", "B2" and "B3". The numbers and letters on the wire are located every 500 mm. All marking elements have a standard size: width - 0.2 cm, and height - 0.5 cm. Designations are highly resistant to ultraviolet radiation.
About the merits
Customer reviews of SIP wires are extremely positive. According to them, the following advantages of the product can be distinguished:
- In case of falling or connecting wires with each other, the power supply does not stop.
- The special design of the wire prevents ice and snow from freezing on it, which positively affects the quality of the power supply.
- SIP wires are convenient for installation.
- When operating this cable product, theft of energy is practically excluded, since it is impossible to illegally connect to the wire.
- In the market of conductive systems, it is possible to purchase SIP wires of various sections.
According to the manufacturer, the insulating layer applied to the cable ensures safety even for birds sitting on it.
Classification
SIP wires of various types are presented to the attention of consumers. Their classification is made by section. For example: 4 x 16, 2 x 16 ... 4 x 35, etc. Depending on the technical characteristics and type of insulation coating, the following conductive systems are distinguished:
- SIP-1. Designed for a network of 380 V. It consists of four wires, for the manufacture of which aluminum and aluminum alloy are used. In this wire, all cores, with the exception of zero, have polyethylene insulation. The zero core contains a steel core and is considered a carrier. Also on the market there is an option with an isolated zero core. Such a wire is marked as SIP-1A.
- SIP-2. All strands are insulated in the cable. It is used when arranging highways. In addition, with this cable, it is possible to carry out branches to residential buildings. The wire is suitable for cold climates.
- SIP-3. It is a solid wire made of steel and aluminum. Light-stabilized polyethylene is used as an insulating coating. It is used in temperate tropical and cold climates.
- SIP-4. The wire is not equipped with a supporting core. All others are insulated.
- SIP-5. For this cable, as in SIP-4, a carrier core is not provided. Crosslinked polyethylene is used as an insulation coating in this product. It is used for laying highways of the high voltage line and arrangement of street lighting.
All of the above wires, except SIP-3, can be used with a rated voltage of not more than 1 kV. Technical characteristics of SIP-3 allow it to operate at voltages up to 35 kV.
About technical specifications
- The conductive product operates at a permissible load of up to 35 kV.
- The power frequency indicator is 50 Hz.
- Wires and cables are suitable for operation in temperature conditions from -50 to +50 degrees. However, installation and tensioning can only be carried out at -20 ° C.
- Many manufacturers of these products provide a 5-year warranty. According to experts, the maximum service life for which these wires and cables are designed is approximately 50 years.
About installation
Before starting installation work, you need to get the appropriate permission from the energy supplier. After it is received, it is recommended to perform the following actions:
- Choose the wire of the desired cross section. According to experts, a cross-section of 15 mm is considered optimal for domestic installation.
- The branch from the trunk is made using a special clamp, which eliminates the need to strip the cable. Using the clamp, the lugs are mounted immediately.
- If the distance between the network and the house is more than 25 meters, then you should use a special tensioner. In this case, the master will have to install additional support. Its task is to ensure a reliable wire connection.
- For the external walls of buildings to which the cable is output, special anchor clamps are provided. This device is an armature and bracket in which the number of clamps corresponds to the number of phases.
- If the wiring is carried out on a wooden building, then electricians recommend additionally insulating the cable. In other cases, the wires can be left open. Inside the house where further branching will be carried out, the cable must be inserted at least 100 mm. Work at this stage is performed using a special coupling.
In the process of laying, it is necessary to ensure that the SIP cable does not drag on the ground and does not touch the branches of trees.
About manufacturers
At the moment, there are several manufacturers whose high quality conductive products are noted by experts. These include:
- "Kama cable."
- "Rybinskkabel".
- Sevcable.
- "Moskabel Plant".
About the price of SIP cable
This wire can be purchased in almost every department of electrical goods stores. Experienced electricians who are professionally laying are trying to take the cable straight from the factory. According to consumers, the price of SIP products in each region of Russia can be different. For example, in Ufa SIP-4 can be purchased for 87 rubles. In Vladivostok for 88 rubles. The price of SIP-4 in Khabarovsk is 89 rubles. Experts explain that the farther from Moscow, the more expensive the product will cost. In addition, the current-carrying system, like any other product, at retail will cost more than in bulk or immediately from the factory.