- How is it decrypted?
- Design Features
- General Parameters
- Scope of Application
- Main Advantages of
- Best Manufacturers of
How is it deciphered?
The abbreviation of NYM stands for:
N - Normenleitung standard( German cable classification standard);
Y - insulation is represented by polyvinyl chloride( PVC);
M - installation in different conditions is allowed;
In addition, it should be noted that the NYM cable marking can have varieties with the "-J" or "-O" prefix, which accordingly means the presence of a yellow-green or blue wire( ground or zero).
The VDE( Veiband Deutscher Electrotechniker) abbreviation can also be indicated on the cable, which means that the product meets all standards and can be used in fire hazardous areas.
Design Features
Considering the technical characteristics of the NYM cable, the first thing I would like to talk about is product design. So, the conductor is arranged as follows:
- copper conductors, can be single-wire or multiwire depending on the cross-section;
- number of cores from 1 to 5;
- insulation of live conductors made of polyvinyl chloride;
- between the cores and the outer shell is an intermediate layer of non-flammable sealing( melon-filled rubber);
- outer shell is represented by PVC plastic;
- color marking conforms to international standards.
Basic parameters of
Speaking about the NYM cable, one can not but consider its main technical characteristics, namely:
- Rated voltage( maximum permissible load): 660 Volts( 0.66 kV);
- Frequency - 50 Hz;
- Cross-section of copper conductors from 1.5 to 35 mm2;
- Operating temperature -50 ° C to + 50 ° C;
- Minimum laying temperature - not lower than -5 ° С;
- The minimum permissible bending radius is 4 outer diameters;
- Service life - from 30 years;
- Warranty period - 5 years;
As for the other technical characteristics of NYM( permissible current, external diameter, weight), they can be different, depending on the size of the conductor. All basic parameters we provided in the tables with the description below: 
Scope of application
As already indicated in the marking, the NYM cable can be used in any electrical work( both industrial and household).Due to the fact that the construction of the power conductor is included in the intermediate non-combustible layer, the electrical cable is most often used for the installation of electrical wiring in a wooden house, as well as for outdoor installation( outdoors), provided that it does not receive direct sunlight.
At home, the stranded NYM can be used for outdoor and buried wiring. The cable is used both for connecting the lighting line and for the outlets. It is not forbidden to use a conductor for laying in the ground, only the only thing - experts recommend that it be additionally passed into the corrugation.
The main advantages of
You have familiarized yourself with the technical characteristics of the conductor, now I would like to tell you about the main advantages of the NYM cable. Among the main advantages are:
- Elasticity of the product. Thanks to the intermediate rubber layer, the cable is quite flexible. This advantage is rational to use when installing electrical wiring in hard-to-reach places, as well as in the ground, if you need to conduct an electrical line for a long distance.
- High quality products. Since the conductor passes a lot of foreign surveys before entering the market, when purchasing a NYM cable, you can be sure that the cross section of the conductors and the thickness of the insulation correspond to the marking, which can not be said about the dangerous wire of the PNPP.
- Due to the same intermediate layer, the cable is non-combustible, therefore it can be used in fire-hazardous areas.
- NYM has a lot of positive feedback from experts in the field of electrical work. On most forums, this type of conductor is strongly recommended for use in lighting and power circuits.
As you can see, the advantages of this electrical cable speak for themselves. The only drawback is the cost of production. In comparison with domestic analogues, for example, cable VVGng, for such a conductor will have to give more money.
guide The best manufacturers of
Well, the last thing I would like to tell you is which manufacturer of NYM is better to choose. From foreign factories of manufacturers, the leaders are Helukabel, Lapp Kabel and TKD Kabel( Germany).Also, the products from the producers DENIZLI CABLE LTD( Turkey) and Nexans( France) are of high quality.
From domestic producers of NYM cable it is possible to advise such plants as Sevkabel, Kamkabel and Pskovkabel, whose products have passed all the certificates of conformity and meets all standards of TU and GOST.
We draw your attention to the fact that for the last years in the market of electrical products fakes have started to appear more and more. In your case, it is strongly advised to bypass products marked "NUM" and "HUM", as in the photo below!
That's all I wanted to tell you about the technical characteristics of the NYM cable. Having studied the marking of the conductor, the scope and purpose, now you can decide exactly whether to buy such version of the product for your own electrical work!
It will be interesting to read:
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- How to determine the cross-section of the cable
