TPPep cable: decoding, technical characteristics, design

TPPep cable decoding:

• T - Telephone
• P - Polyethylene insulation
• P - Polyethylene shell
• ep - Screen made of aluminum polymer tape

TPPep cable design elements:

1. The conductor is made of soft round copper wire. 2. Insulation: in cables of the TPPep brand - solid polyethylene; in cables of the TPpP brand, film-porous-film polyethylene, consisting of three layers: - a layer of solid polyethylene, - a layer of porous polyethylene, - a layer of solid polyethylene. 3. Twisted pair. 4. Elementary five- or ten-pair bundles. 5. Main 50- or 100-pair bundles. 6. Twisted core. 7. Belt insulation - polyvinyl chloride tapes. 8. Screen - aluminum polymer tape, tinned copper contact wire is laid under the screen. 9. Shell made of polyethylene.

Explanation of the TPPep marking

To determine the main parameters of the TPPep cable, consider its markings. The marking includes alphabetic and numerical designations indicating the scope of application and other characteristics, namely:

• T - indicates that this is a telephone cable designed to transmit communication signals;
• P – cable cores are insulated with polyethylene;
• P – denotes the material of the outer shell of the insulating layer – polyethylene;
• ep - indicates the presence of a film-type screen; in cases where this letter designation is absent, the cable is equipped with a foil screen, but such models are no longer produced, but are in use.

In addition to the above standard markings for TPPep, additional ones can be used. For example, if there is the letter “Z” - TPPepZ, such marking will mean that it has a hydrophobic filling, oil or other based on fatty compounds, which prevents the accumulation of moisture. The letter “B” - TPPepB indicates the presence of armor around the main cable sheath, usually made of tin tape. The presence of the letter “M” in front of the TPP - MTPP indicates that the model has few pairs - the number of pairs in it is from 1 to 5, and the prefix “ep” may also be absent - then the wire does not contain a screen.

Consider an example of decoding the cable marking TPPepZB - 100 × 2 × 0.64. Accordingly, here is a telephone cable with polyethylene core insulation and polyethylene sheath insulation, a film screen, filled with a hydrophobic substance with an armor coating. 100×2 - indicates that the cable uses 100 working pairs, but in practice there are slightly more of them - 102, 103 or 105, the rest are used as spare ones. Spare conductors are included in models of 50 pairs or more. 0.64 is the diameter of the conductor, in this case it is 0.64 mm.

Sections

Cable VBBShv

Serial cable TPP is produced with cores with a diameter (mm): 0.32; 0.4; 0.5; 0.64; 0.7 and 0.9. If necessary, using the well-known geometric formula (S= (π*d2)/4), you can calculate the cross-sectional area. For d=0.64, the value is S = (3.14+0.642)/4 = 0.8874 mm2. When multiplied by the number of conductors, the total cable cross-section is specified.

The following parameters are encrypted in the digital part of the type designation (50 x 2 x 0.64):

• 50 – number of pairs;
• 2 – pair arrangement of conductors;
• 0.64 – diameter of the conductor in mm.

Using these values ​​in the reference table, you can determine the corresponding outer diameter of the product - 22.8 mm.

Design

The TPPep cable is a device for transmitting low-power electrical signals and structurally includes such elements.

Rice. 1.: TPPep cable design

As shown in the figure, structurally it consists of:

• 1 - the main rod of current-carrying conductors, consisting of conductors connected in pairs. Copper is used as a conductor material. The diameter of such a core can be from 0.32 to 0.9 mm, and their number and type of twist determine the numbering order and method of connection in the cable. In total, there are two types of twisting for TPPep - ply and bunch.
• 2 - core insulation made of polyethylene. It has different colors, allowing you to easily distinguish between wires in pairs. This difference helps to quickly navigate when routing wires in the coupling.
• 3 – a screen made of aluminum-polyethylene tape, designed to remove electromagnetic interference induced from outside. Additionally, a conductor is installed with it to remove the induced potential.
• 4 – bare tinned copper wire, intended for connecting the screen, allows you to remove the induced potential from the shielding surface.
• 5 – outer shell – designed to protect the main core of the TPPep from external factors. Made from light-stabilized polyethylene.

Stranding type

As stated above, the TPPep cable can have two types of twisting - twisted and bunched. At the moment, the beam type TPPep is being produced, but both are still widely used in operation. Therefore, take a closer look at the differences between both types.

Stranded TPPep - implies an arrangement of pairs in the cable in which the wires in it form several layers. These layers are called layers, which is where the name of the type of twist comes from.

Rice. 2. Strand design

A distinctive feature of this TPPep cable design is the bright markings of the first and second pairs - red and blue, respectively. The direction of counting - clockwise or counterclockwise - depends on their location. The remaining strands are not distinguished by their bright color, but each layer is separated from the previous one by a thread twist that holds each of them separately. Therefore, by unraveling one of the layers, the rest remain assembled and do not create confusion when connecting.

But, due to the lack of color marking of the cores, the process of identifying the required pairs when connecting becomes much more complicated, so they have to be called. A significant advantage over TPPep bundle twisting is its much smaller outer dimensions.

Bundle twisting is an arrangement of cores in a cable when several pairs (5 or 10, depending on the total number in the rod) are combined into one common bundle.

Rice. 3. Bundle twist design

A distinctive feature of the bundle-type TPPep cable is that each bundle is separated using a wound thread, which secures the pairs in it and prevents them from breaking up. This braid includes a colored thread or tape indicator, which allows you to highlight a specific group of conductors. But it should be noted that there are TPPep brands that contain several bundles with the same color. In such situations, you cannot navigate by color marking when connecting; you should definitely call the wires.

TPPep cable - price and terms of wholesale delivery.

When forming transactions for a range of services for the shipment of such types of products as telephone cable TPPep, the price depends on a wide range of factors. First of all, this is a seasonality factor, which is formed from the dynamics of the cost of raw materials (including copper wire rod) and fluctuations in current customer requests. The latter have a direct relationship with the moment of the seasonal cycle of construction work. Similarly, TPPep telephone cable, like any other cable and wire products, significantly changes its price when the total volume and required delivery time per application changes. So, for example, if you need to buy a TPPep telephone cable in bulk (or as part of an order that includes a large wholesale volume of any other product), the price will always be lower than for small wholesale supplies. Therefore, there is simply no single answer to the question of what the price of TPPep cable is. In each specific case, for each application, the cost will be different. Our company’s specialists have many years of successful supply experience in electrical markets, so at any time they will offer you the most favorable terms for the supply of the products you need. From us you can buy TPPep communication cable wholesale from stock at the lowest possible prices!

Depending on the conditions of your project, you can buy TPPep cable GOST R 51311-99, GOST 31943-2012, or TPPep TU 3572-088-21059747-2012 from our company.

In order to reduce the final transaction price, delivery is carried out from the warehouse closest to your region.

How to buy a TPPep cable with a guarantee and at the best prices.

TPPep brand cable will be an excellent purchase if you purchase from a reliable company that will control the origin of the product, collect the entire package of necessary documentation and GOST certificates of compliance, and also ensure proper storage and delivery. Only in this case can you be sure that the cable will last the entire required period. Subject to the installation and use of this equipment described above, the customer receives a quality result that meets the highest standards.

See also: TPPepZ cable

Specifications

If connected to any circuits, it is important to ensure that the characteristics of the TPPep cable correspond to the operating parameters of the device or its networks.

The main technical characteristics include:

• The rated operating voltage is 225 and 145 V for AC lines, and 315 or 200 V for DC sections.
• The permissible operating temperature limit ranges from -50 to +60°C for the TPPep brand.
• Resistance to electric current - determines the ability of the cable to conduct electricity; for TPPep it varies from 216 to 27.4 Ohm/km when direct current flows.
• Capacitance is especially important in determining the impedance in alternating voltage circuits and is 45 nF/km.
• Insulation resistance is measured with a megohmmeter and is at least 6500 MOhm.
• The minimum bending radius must be at least 10 outer diameters of the TPPep. Determined depending on the number of pairs in a particular model, this value can be taken from the table.

Table: Estimated outer diameter of cable, mm

Analogue substitutes for telephone cable TPPep

Products with a relatively small number of pairs (1-5) are marked with the letter “M” in the abbreviation – MTTPep. Modifications of KAPZ are created according to a similar standard design, but some products in this series are created with the diameter of conductors increased to 1.2 mm (corresponding to an increase in cross-section). The combination “KA” means “subscriber cable”.

Experts suggest using the following replacements if necessary:

• PKSV - cable with single-wire copper conductors, designed for a constant voltage of no more than 120V and a signal frequency of 100 MHz maximum;
• TSV, TPV, TRV - analogues with copper conductors with different types of shells;
• TZASHP - improved multi-layer protective covers, 4-19 twisted “fours”;
• MKEKSHV is an effective screen made of thin copper wires.

For your information. Modifications with low smoke emission and non-combustion are designated LS and NG, respectively. In some situations, the installation of such products is required by the mandatory requirements of fire safety regulations.

Advantages and disadvantages

In comparison with other models of cable and wire products used in communication lines, this brand has a number of advantages and disadvantages. The advantages of the TPPep cable include:

• The presence of bundles or layers fastened together that do not fall apart during installation.
• Using the TPPep color marking system, which greatly simplifies the process of connecting cable leads to a coupling or terminal block.

  
  Figure 4. Example of connecting cable pairs

• The presence of a shielding coating that significantly reduces the amount of interference from external electromagnetic waves.
• A wide range of models allows you to transmit signals for any number of subscribers or signal transmission points.
• Resistance to moisture, in comparison with communication cables with a vinyl sheath, are much less susceptible to the accumulation of moisture from the environment. Due to this, the scope of their application is significantly expanded.

Among the disadvantages of the TPPep cable, one should highlight its greater susceptibility to combustion when exposed to flame. As practice has shown, the polyethylene shell ignites easily and supports the development of fire. Another disadvantage of TPPep is that some models with a large number of beams have the same color marking. This negates the ability to connect based only on coloring.

Scope of use.

Telephone cable TPPep is very common and is actively used in Russia and the CIS countries for conducting communication systems in local primary networks:

• With a rated voltage of up to 225, 145 Volts alternating current with a frequency of 50 Hertz.
• With voltage ratings up to 315.200 Volts DC 50 Hertz.

This type of cable is actively used for installing cable systems underground in sewer structures, sewers, mines, as well as above ground, along the walls of buildings and on overhead communication lines.

During the installation process, under no circumstances should moisture or soil samples with electrical conductor properties be allowed to enter under the TPPep shell. For this reason, it is recommended to carefully monitor the cable ends during installation. Also, you should not use this type of cable in places where there is a risk of contact with its sheath of substances that negatively affect the integrity of the product.

Application

The TPPep cable is used to form communication lines or to transmit any control signals. This brand of cable is laid in telephone sewerage devices, on walls, in shafts, trays, overhead lines and in cable ducts. It should be noted that at the initial stages of production of TPPep it was also used for underground installation in the ground, but the cable very quickly failed due to the active influence of the environment. Since its placement in open ground is not currently used, any other negative effects on the insulation during operation should also be avoided.

The TPPep cable can only be used in areas and places where there is no significant electromagnetic influence. Otherwise, the level of interference will affect the transmitted signals.

Areas of use

Cable ААШВ

Cable products of this category were previously used to create underground communication lines in the ground. Currently, such solutions are not used due to the relatively short service life of TPPep in difficult conditions. Acceptable installation:

• using specialized sewerage protected by concrete walls;
• in metal mounting trays;
• in grooves and channels;
• in an open version for fastening to walls;
• with hanging systems indoors and outdoors.

Main manufacturers

When choosing a specific TPPep brand, you should pay special attention to the leading manufacturers of this type of product. Since they are the ones who ensure proper quality and compliance with all declared characteristics. Among these companies, the following have proven themselves well:

• Samara Cable;
• "TD RT-Cable";
• "TD Voronezhtelekabel"

The above companies produce TPPep in a wide variety of sizes and modifications. Therefore, before purchasing a specific model, you should decide on the parameters you need and choose the most suitable one from those offered in the catalog.

Lifetime

Under the conditions stipulated by the design calculations, the tppep cable retains good technical characteristics for 20 years and more (25-armored modifications). Compliance with the actual operating conditions of a particular design is essential. Thus, when installing outdoors, it is recommended to choose shells that are resistant to ultraviolet radiation. Steel tapes will prevent mechanical damage. These observations explain the economic feasibility of increasing the initial investment to extend the life of wired information transmission channels.

Purchasing TPPEP wires wholesale in St. Petersburg

RosBelKabel LLC sells TPPEP cables in small and large wholesale at prices that are very favorable to customers. You can get advice on all items in our catalog and quickly place an order either by phone (listed at the top of this page) or through the website - using the online consultant form. We will deliver your TPPEP wires to any point in St. Petersburg. In addition, delivery to other regions is possible - please check with our managers for details and costs. LLC "RosBelKabel" - when high-quality cables are sold at competitive prices!