NYY underground cables | without PU by the metre from stock

Underground cable NYY – specifically for installation underground

The underground cable NYY is used when electrical wiring is necessary underground. This is why it is also called an underground cable. The NYY cable has an especially robust insulation on the outside, which protects against, for example, chemical influences or damage from insects and small animals living underground. Apart from protecting against the weather, installation underground has the advantage that the landscape and environment are not visually affected. Safe protection against mechanical damage is used both in the private area of domestic installations and in industry and power station technology. Wherever it is necessary to connect electronics, the robust NYY underground cable is the reliable choice.

Impressive qualities for the installation of the NYY underground cable

The cable of type NYY-J underground cable is available in different variants in respect of the core number and the conductor cross-section. The cable structure consists of stranded wires made of bare copper-clad steel, whose solid copper conductors are surrounded by a filling compound. The single-wire round conductor structure complies with the standard DIN VDE 0295, Class 1. For the optimal magnetic shielding, the cores are layered concentrically. The coloured cores comply with VDE 0293-308, The core insulation and outer sheath are made of robust polyvinyl chloride (PVC). The minimum bending radius when permanently installed of 12.0 x outer diameter allows flexible installation under the earth. The environmental characteristics of the weather-resistant construction cable allow use in hot and cold water and guarantee a safe installation outdoors thanks to the UV resistance. The cable is designed for a temperature range from -5°C to 50°C. In case of fire, the cable has self-extinguishing and flame-retardant properties in accordance with IEC 60332-1-2. The outer sheath in deep black complies with RAL 9005, whilst the cores on the inside are coloured in accordance with VDE 0293-308. With a permissible nominal voltage of 600 V between the phase conductor and the earth potential and 1000 V between the phase conductors, the cable is a reliable energy supplier in a wide variety of applications.

Definition of the product name NYY-J

The letters NYY-J in the product name provide detailed information about the precise type of cable, its construction and the optimal purpose. The abbreviations are listed in a particular order that provides information about the structure of the interior of the cable, from the conductor (cores) outwards. The individual letters stand for the properties that are assigned to the cable and the materials that are used.

The cable NYY-J can be translated as follows:

N – standard cable
Y – insulation of the cores made of PVC (solid plastic insulation)
Y – insulation of the cable bundle made of PVC (solid plastic insulation)
J – with an internationally identified yellow and green protective conductor
O – the cable has no yellow and green protective conductor

Challenging areas of application of the cable NYY-J

Thanks to its resilience and durability, the NYY-J construction cable from Lapp is the top choice for installation outdoors, in the ground and also in cable ducts. It can also be used indoors or in concrete. An installation in the water is only permissible if mechanical damage to the installed cable is ruled out. The cable’s primary application is as a power distribution cable in industrial plants and switchgears and in local networks.

What is the difference between NYY and NYM?

The NYM cable e.g. NYM-J 3x1.5 is a very frequently used cable that is predominantly used for surface-mounted or in-wall installation in buildings. An NYY cable, e.g. NYY-J 3x1.5, can be installed outdoors and also in the ground. Therefore, we can say that an NYM cable is used indoors and an NYY cable outdoors.