Marking in electrics - designation of phase, zero, grounding in color

  1. The color of the wire will tell its purpose.
  2. Letter hints
  3. Grounding: safety green-yellow
  4. Zero conductor
  5. Phase: assorted colors
  6. Trust but check

Work with electricity is regulated by special "Rules for electrical installations" (PUE). Here The color marking of the specific wire and cable used in electrics is clearly spelled out. And because the designation of the phase and zero standards for all wiring.

The color of the wire will tell its purpose.

An electrician opens the junction box. And there - the cables are the same, white. Working with them is extremely difficult. And to determine the purpose of each, you need to measure all the indicators using indicator screwdriver or multimeter.

And to determine the purpose of each, you need to measure all the indicators using   indicator screwdriver   or multimeter

Wires need to be checked with an indicator screwdriver or multimeter

It is clear that the coloring of wires greatly facilitates the repair process. This approach ensures the safety of work, makes the process easier and more convenient. In addition, an electrician spends much less time focusing on the colors of the wires.

For arranging the electrical network in the house, three main cables are used: phase, zero, earth. At installation color marking on pu is applied.

Remember them is not difficult. Moreover, usually for the arrangement of the electrical network in the house, three main cables are used: phase, zero, earth. At installation color marking on pu is applied. So, it is impossible to confuse the purpose of a specific wire.

Marking the phases by color will help to properly hang the chandelier, connect any electrical equipment to the network. The most obvious example with a lamp. If you confuse the phase and zero, when replacing the bulb a person will receive a powerful electric shock. And vice versa. When the phase and zero, their designation is not confused, you can touch even the burning lamp. It is absolutely safe. After all, the phase goes to the switch, and the zero goes to the lamp, neutralizing the voltage.

Letter hints

In the wiring diagrams adopted not only color, but also alphabetic marking. The main thing - to remember the three notation. This is l, n, pe in electrics. These lettering are also great tips for wizards.

These lettering are also great tips for wizards

Color and symbols will help to understand the wires

The designation l and n in electrics is applied near the connection terminals . These are the first letters of English words or phrases denoting the function of a particular wire. These straightforward symbols will guide you on how to properly connect the device to the network.

It should be noted that l and n in electrics are universal notation. They are universally accepted. So, there will be no problems with connecting equipment, instruments, devices of foreign manufacturers. And the notation l, n in electrics will tell you which wire to connect to.

Grounding: safety green-yellow

Grounding or protective conductor is, above all, safety. And safety in electrics is worth a lot. This cable serves as a spare player. And it comes into play only when the isolation of the phase or neutral conductor is broken. Simply put, without grounding, a defective appliance will strike a person at the moment of contact, but with grounding it will not.

That is why now various household appliances, other devices are available with a protective cable. Grounding must necessarily have wiring at home.

Ground wires ensure the safety of electricity in the house

Grounding is indicated by the combination of pe - abbreviated from the phrase Protective Earthing. Sometimes they write the word "earth." In the diagrams, a graphically marked cable may be indicated by special symbols:

  In the diagrams, a graphically marked cable may be indicated by special symbols:

If you disassemble the color designation, then, according to GOST R50462, yellow-green colors are used for this type of cable. In a hard single core wire, the main color is green, trimmed with a yellow stripe. In the soft multicore yellow is used as the primary color. The longitudinal strip, on the contrary, is green. There are non-standard color marking options for protective compounds. In this case, the strips have a transverse view. In addition, only green colors are used.

Often, the ground cable is paired with a neutral one. Then a blue border on the ends of the cable is added to the yellow-green coloring. In this case, the letter abbreviation - pen.

Video: how to understand the color marking of prvod

One way or another, the answer to the question of what color the grounding in a three-core wire is unequivocal. You should always look for a green-yellow combination.

Grounding is not difficult to find in the switchboard. To connect it using a special bus. In other cases, the cable is attached to the body and metal door panel.

Zero conductor

Zero conductor or, as it is also called, neutral performs a simple but important function. It balances the load on the network, providing a voltage of 220 volts at the output. Eliminates the phase from jumps and distortions, neutralizing them. Not surprisingly, its symbol is the letter n - formed from the English word Neutral. A combination of symbols n, l in electrics always go together.

The color of the zero wire is always blue. Of course, there are variations - from dark blue to sky-blue. But blue is also blue in Africa.

Zero conductor always blue light

In the distribution panel, all cables of this color are grouped on one, zero bus with the corresponding letter abbreviation. Sockets also have the necessary markings.

Therefore, the master will never confuse where to attach the special zero contact.

Such marking, the principle of operation are applicable to both single-phase and three-phase networks.

Phase: assorted colors

It is through the phase that the voltage passes. So, working with this type of cable should be especially careful. This wire is denoted by the letter l in electrics, which is an abbreviation of the word Line. The three-phase network uses the following wire designation: l1, l2, l3. Sometimes English letters are used instead of numbers. Then it turns out la, lb, lc.

Then it turns out la, lb, lc

Wire color marking

About the color designation of the phases can talk a lot. One thing is clear: a phase conductor can be of any color other than yellow, green, and blue. However, Russia found its answer to the question of what color the phase is. According to GOST R 50462-2009, it is recommended to use black or brown color. However, this standard is only a recommendation. And because manufacturers do not limit themselves to certain color frames. For example, red and white are much more common brown. Bright colors - pink, turquoise, orange, purple are also often present in the set. It is believed that bright colors will protect from danger, attract the attention of the master. Still, the voltage is not joking.

Phase color marking helps in multiphase networks. Cables with several phases differ in color, which facilitates the work of an electrician. Despite this, you need to work with them carefully.

Trust but check

Despite state standards and standards, color markings may not always correspond to the intended use of a specific cable. That is why it is better to check the correctness of marking before connecting the equipment. Three-core wire is best tested with a multimeter. The device will indicate the phase wire and, accordingly, to zero.

The device will indicate the phase wire and, accordingly, to zero

Before connecting the correct labeling is better to check with special equipment.

In general, a three-core cable in electrics is used frequently. That is why it is important to learn to work with him. It is very important to observe and color symmetry. The color of the wires in phases must be strictly observed. Only conductors of the same color should be connected to each other . Otherwise, trouble can not be avoided. The equipment may break. Wizards can shock. Incorrectly connected wiring can cause a fire. In order to avoid all this, the marking of phases, cables, and terminals is used.