Explanation of wire and cable marking

Purpose

Purpose cipher - Displays the main features, namely:

• living material;
• appointment;
• type of insulation;
• design feature;
• cross-section of the product;
• rated voltage.

main varieties

Today for electrical works used cords, cables and wires.you must deal with the fact that are these products and what are their differences before decoding marking.

Wires

wire is the electrical product, consisting of one or more wires twisted together, without insulation or insulated.Shell core, usually mild, not of metal (although the winding wire as found).

Bare conductor insulated wire

Such products can be used in electrical work (for example, the wiring in wooden houses), as well as in the manufacture of motor windings.To date, there are wires with copper and aluminum conductors.Copper variant oxidized rapidly in the open space and has a high price, but it is able to pass through itself higher current loads.Moreover, copper is more elastic and therefore does not break so quickly.Aluminium more fragile and are not connected with copper (except that only the terminals), but for that are low in cost.Today, aluminum wiring is used less and less.

It should also be noted that the contacts can be insulated and bare.The latter option is used to power lines.The insulated wire can be protected and unprotected.Protection is another insulation layer (plastic or rubber) which closes the sheath strands.

latter classification is made depending on the purpose: mounting, power and installation.Equipment wire must be copper, is generally used to connect components in the electric circuit board, as well as to connect in radio circuit.The power (and installation), better known to us asIt used outdoors and indoors.

Cables

electrical cable is a product of several wires that are under the same insulating sheath (PVC, rubber, plastic).In addition to this shell can be present additional protection - armored shell of wire or steel tape, which must be indicated on the labeling.

Aluminium wire Copper contacts

There are 5 main types of electric cables:

• power;
• control;
• management;
• for communication;
• RF.

briefly examine the conditions for the application of each of the products.

power used for the transmission of electricity in power and lighting appliances.There are products of various types and purposes.Basically, the power cables are used for external wiring (both air and underground methods) and domestic (residential and non-residential premises).Power cables may have both aluminum and copper conductors.Preference is recommended to give the latest version.An insulating layer can be PVC, paper, rubber, polyethylene, etc.

control is used to operate electrical devices, which transmit information signal to control any devices.This type is also available with aluminum and copper conductors.

cable management is a copper electrical conductors with a shield.It is used in various automation systems.The protective shield serves to remove noise, as well as protection from mechanical damage.

cable connection used to transmit information using different frequency currents.Transfer local communication lines carried by low-frequency conductors, and long-distance lines - high frequency.

RF cable is used in electronic devices.The main purpose - to send video and radio.

Cords

cord consists of several (at least two) of flexible lived a small cross-section (1.5 mm.kv.).Cores cord composed of a plurality of interwoven wires, the insulation of which the non-metallic coating.Stranded cords usually presented items, but there are two wire, which are used when the appliance needs no special body grounding.To date, the cords used to connect home appliances to the network (for example, a refrigerator or microwave oven).

cord for electrical appliances

So we figured out the basic differences between the three types of electrical products.We hope that the information was available to you.We recommend also see the video in which this information is provided to more clearly:

General differences

All conductors can be differences on the following grounds:

1. cross-section.There are wires with section from 0.35 mm.kv.240 mm.kv.
2. Material production: copper, aluminum, alyumomed (special composite of two metals).
3. Rated voltage (for example, able to withstand 220 or 380).
4. Number of cores (solid or stranded).
5. insulation material (PVC, rubber, paper).
6. containment material (rubber, plastics, metal).

Marking

General

basic standards for marking wires, cables and cords according to GOST same, so first look at the transcript of an alphabetic cipher.in electrical engineering.

Example cipher

letter №1 characterizes core material.Aluminium is assigned the letter "A", Cu letter is not assigned.

letter №2 labeling characterizes the type of wire or cable jacket material.To wire the second letter refers to "P" - flat, "M" - mounting, "K" - control, "MG" - mounting with flexible living, "P (Y) or W" - the installation.

№3 The letter describes a material for conductor insulation.The letter "B" or "BP" means that the isolation of PVC, "P" - rubber, "H" or "HP" - nayritovaya (rubber, which does not burn), "P" - polyethylene, "K" - Kapron, "F"- a metal (faltsonovaya)" ME "- enamel," L "- patent," W "- polyamide silk," O "- polyamide silk as braiding," C "-steklovolokno," E "- shielded isolation"T "- with suspension cable insulation," D "- with flexible insulation core.

addition, it should be noted that the rubber insulated wire can be further protected in the following shell view, "N" - nayritovaya, "B" - PVC.Please note that the letters are placed in the data labeling after the insulation material will be listed very core.

letter №4 characterizes design feature.If the written letter "A", it means the product is paved, "B" - armored ribbons, "G" - without a protective cover (if the cable) and flexible (if held), "K" - an armored round wires, "T" - isfor installation in pipes, "O" - protected braiding.

Decoding digital signage:

Digital №1 always indicates the number of veins, if the marking of wire or cable number before the letters missing, then solid conductor.

Digital №2 characterizes cross-sectional area in mm.kv.

№3 figure shows the nominal voltage.

Marking strings represented by the letter "W".

readers to "electrician himself" to understand the essence, give this example:

Explanation marking VVG 4 * 2,5-380 cable.So:

• letters "P" and "A" is not, therefore, live copper;
• second letter "B" indicates that the PVC insulation;
• also contains the second letter "B", which means one more protection sheath made of PVC;
• last letter - "D" indicates that the protective cover is absent;
• first digit "4" - four cores;
• «2,5» - cross section mm.kv .;
• 380 - Nominal voltage of 380 V.

We hope that now you became clear labeling.If you have any questions, ask them immediately to the "Q & A" category!

Russian products

Marking Russian Cables:

Designation domestic wires and cords:

foreign products

tables of foreign cable marking:

tables marking foreign conductors:

Tables

Stamps and destination popular wire:

Stamps and purpose of popular cable:

Stamps and popular destination cords:

Using the data tables and information you will easily be able to determine the characteristics and purpose of any conductor when installing in your own home or apartment!
Also read:

• Wire Colors
• Methods wiring in the junction box
• How to find a short circuit in the wiring?