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Lapp Limited News

A Flexible Approach to Power

The current UK standards and regulations for electrical wiring are no longer substantially different from the rest of Europe. The regulations have updated to further fit with International standards.

The process of European harmonization has started with the amendments to the 16th Edition. One of the areas under review is the need to use armored cables, mostly in areas where protective containment is used which is in line with European and International regulations.

The Lapp Group takes pride in leading the market with the best quality and in our commitment to customers, supplying the right products for the right applications.


Both VDE approved, Lapp NYCY cables & NYY cables are black PVC jacketed, power and control cables with single and multi-wire conductors. These power cables are designed for energy supply in cable ducts, power stations, distribution boards, industrial applications and subscriber networks. They may also be used in brickwork and in concrete. NYY cables can be installed in open air, underground, in water and indoors. Available in single and multi core variants.


NYY and NYCY are loosely referred to as general mains power cables in the industry. SWA (Steel Wire Armored) cables are the armored equivalent of this range.

The UK market is slightly different to other markets in the world as SWA cables have become part of almost all specifications for commercial and industrial applications.

While SWA cables provide increased mechanical protection, it is in many cases viewed as not necessary and over specified. At Lapp Group we believe we can provide some good justification, in offering better and more cost effective solutions for most applications where SWA may not be required.

There are many advantages of using NNY over SWA, the cost of the cable installation is less (labour time), it’s lighter in weight than SWA, the overall cost of the cable is between 4%-10% cheaper than that of SWA, Lapp Power cables are not affected by steel prices.

Main factors for specifying the right power cable

Modern power cables come in a range of sizes, materials and types. Each is adapted to its uses. When choosing the right cable for an application there are three main factors.

1. Environmental conditions (temperature, water, chemical or sunlight exposure) as well as any other conditions that may affect the characteristics of the cable determining the form and composition of the outer cable jacket.

2. Working voltage, determining the thickness of the insulation.

3. Current-carrying capacity, determining the cross-sectional size of the conductors.

Insulation materials, resistance to environmental conditions


Polyvinyl chloride is now the most usual low voltage cable insulation. It’s clean to handle and sufficiently resistant to chemicals and oils. The physical characteristics change with temperature; if the cable is cold it becomes hard and difficult to strip and is not recommended for applications with extreme temperature variations. For indoor and outdoor applications the Lapp NYY/NYCY and OLFEX 110 black are ideal. They are more flexible and much easier to handle than SWA.


Some rubber compounds like EPR (Ethylene Propylene Rubber) insulation and PCP (Polychloroprene) are used in some power cables, specifically designed to operate in tough weather conditions and under high mechanical and thermal stresses. Cables like the Lapp H07RN-F and H07BN4-F are heavy wearing cables that are suitable to be used in a wide range of applications, including handling equipment, mobile power supplies and stage and audio visual equipment.

Halogen Free

Some halogen free compounds are being used on applications where fire safety is important. The three main reasons for using Halogen Free cables are Fire Safety, Fire Damage Prevention and Higher Application Temperatures.

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