Designation in electrical L and N: types of wires, their characteristics

World manufacturers of household appliances use the color marking of mounting wires when assembling their equipment. It is a designation in the electrician for L and N. Due to the strictly defined color, the master can quickly determine which of the wires is phase, zero or grounding. This is important when connecting or disconnecting the equipment from the power supply.

Types of wires

When connecting electrical equipment, installing a variety of systems can not do without special conductors. They are made of aluminum or copper. These materials perfectly conduct electric current.

Important! Aluminum wires must be connected only with aluminum. They are chemically active. If they are connected to copper, the current transfer circuit will quickly collapse. Aluminum wires are usually connected with nuts and bolts. Copper - by means of a terminal. It should be taken into account that the latter type of conductors has a significant drawback - it is rapidly oxidized under the influence of air.

Advice in case that the current stops flowing at the point of oxidation: in order to restore the supply of electricity, the wire must be isolated from external influences with the help of an insulating tape.

Classification of wires

A conductor is one uninsulated or one or more insulated conductors. The second type of conductors is covered with a special non-metallic sheath. This can be a winding with an insulating tape or a braid of fibrous raw materials. Non-insulated wires do not have any protective coatings. They are used in the construction of power lines.

Proceeding from the above, we conclude that the wires are:

• Protected;
• Unprotected;
• Power;
• Mounting.

They should be used strictly for their intended purpose. The slightest deviation from the operation requirements leads to a breakdown in the power supply network. As a result of the closure, fires occur.

Designations for phase, neutral and grounding conductors

When carrying out the installation of electrical networks for domestic and industrial use isolated cables. They consist of many conductive veins. Each of them is painted in the appropriate color. The designation LO, L, N in the electric make it possible to shorten the time of installation, and if necessary, repair work.

The designation described below in the electrician L and N fully complies with the requirements of GOST R 50462 and is used in electrical installations in which the voltage reaches 1000 V. They have a deaf earthed neutral. This group includes electrical equipment of all residential, administrative buildings, economic facilities. What color designations of phase L, zero, N and grounding must be observed when installing electrical networks? Let's figure it out.

Phase conductors

In the AC network, there are conductors that are live. They are called phase wires. In English, the term "phase" means "line", "active wire", or "live wire".

The touch of a person to an insulated phase conductor can result in severe burns or even death. What does the designation in electrical L and N mean? On the electrical circuits, the phase wires are marked with the Latin letter "L", and in multi-core cables the insulation of the phase wire will be painted in one of the following colors:

• white;
• the black;
• brown;
• red.

Recommendations! If for any reason the electrician doubts the truthfulness of the information displaying the color marking of the cable conductors, a low -voltage voltage indicator should be used to determine the live wire .

Zero conductors

These electric wires are divided into three categories:

• Zero working conductors.
• Zero protective (ground) conductors.
• Zero conductors, combining a protective and operational function.

What is the designation of wires in an electrician L and N? The neutral of the network or the zero working conductor in the circuits of electrical circuits is denoted by the Latin letter "N". The zero conductors of the cables have the following color:

• Blue color throughout the entire length without additional impregnations;
• Blue color along the entire length of the veins without additional impregnations.

What does L, N and PE mean in an electrician? PE (N-RE) is a zero protective conductor, which is colored along the entire length of the incoming wire by alternating lines of yellow and green.

The third category of zero conductors (REN-wires), which combine the working and protective functions, has a color designation in the electrician (L and N). The wires are painted blue, with ends and junctions with yellow-green stripes.

Necessity of verification of marking

The designation LO, L, N in an electrician for the installation of electrical networks is an important detail. How to check the correctness of the color marking? To do this, use a test screwdriver.

To determine which of the conductors is phased and which is zero with the help of an indicator screwdriver, you must touch it with a sting to the bare part of the wire. If the LED lights up, then a contact has occurred with the phase conductor. After touching a screwdriver to the zero wire, there will be no glowing effect.

The importance of color marking of conductors and strict adherence to the rules for its use will significantly reduce the time of installation and troubleshooting of electrical equipment, while ignoring these elementary requirements will result in a health risk.