Why POWERFLEX® RV-K is a better cable choice than standard N2XY cables 

For years, N2XY cables have been a reliable, fixed-installation standard all over Europe. But what if you could have the same electric performance with unparalleled flexibility and faster deployment? Discover why RV-K class 5 conductors are becoming the preferred choice for industrial installations across Europe.

While N2XY cables have their place, the RV-K cables are redefining efficiency and performance on the job site. We are increasingly seeing this cable specified in the UK as well as across Europe. Let’s break down why making the switch to RV-K is a cost-effective game-changer for your industrial installations.

DECODING THE CABLE DESIGNATION: N2XY vs RV-K 

Understanding the cable designations reveals their core purpose and construction, so you can specify with confidence.

What does N2XY cable mean?

N2XY refers to a low-voltage power cable used for electricity supply with a voltage rating of 600/1000V (0,6/1kV). The cable construction is the following:

• Conductor: solid or stranded, plain copper
• Insulation: XLPE
• Outer sheath: PVC

N2XY cables are German Standard Industrial cables designed according to European (HD) for fixed installations such as: buildings, industrial sites, and underground networks. Available as N2XY-J with an earthing conductor, or as N2XY-O without earthing, these cables are offered in single core or multicore versions (2, 3, 4, or 5 cores, cross-sections offered up to 630 mm²).

What does RV-K cable mean?

RV-K refers to a flexible, low-voltage 0,6/1kV power cable used In Europe -and many other international markets following IEC standards- for electricity supply. It is used in indoor and outdoor installations, and it is well known for its high flexibility, durability, and moisture resistance. The cable construction is the following:

• Conductor: class 5 (flexible) copper.
• Insulation: XLPE.
• Outer sheath: PVC.

The high flexibility of the RV-K cable with its class 5 copper conductors makes cable routing for installation process substantially easier and, as a result, is particularly suitable for use in difficult layouts including connection within industrial applications. RV-K cable is designed according to IEC 60502-1 and AENOR UNE 21123-2 standard.

In short: N2XY= A standardized, fixed-installation cable with XLPE  insulation and a PVC sheath.

Are N2XY, N2XY-J and N2XY-O the same?

While N2XY, N2XY-J and N2XY-O may look similar, this simple letter code prevents confusion and ensures the correct cable is selected for the electrical and safety requirements of the installation. Misunderstanding them can lead to ordering the wrong cable, causing project delays, safety hazards, and unexpected costs.

• N2XY: The base cable type. By itself, it has no dedicated earth conductor.
• N2XY-J: “J” = With a bare earth conductor. This is the most common version for grounded power applications.
• N2XY-O: “O” = Without any earth conductor.

In short: N2XY= A standardized, fixed-installation cable with XLPE  insulation and a PVC sheath.

N2XY, N2XY-J and N2XY-O may look similar, but the suffixes make a critical difference. Read this blog post and understand the distinction between them.

Other closely related cables: N2XH, NYY

Within the range of low voltage industrial power cables, N2XH cable should also be considered. It is closely related to the N2XY, but stands out for its enhanced flexibility -in its “flex” version- and superior LSZH fire performance. The “H” in the cable designation stands for Halogen-Free. This cable outer sheath is Low Smoke (it does not emit dense, corrosive smoke or acidic gases) Zero Halogen when exposed to fire.

NYY cables also have their place to be installed indoors where there is little chance of mechanical damage. This cable is not suitable for direct burial.

In short: N2XH = A standardized, fixed-installation (highly flexible cable in the -flex version) with XLPE insulation and a LSZH outer sheath for enhanced fire safety in public places.

In short: NYY = A standardized, fixed-installation with PVC insulation and a PVC outer sheath.

N2XY AND RV-K CABLE APPLICATIONS

Both power cables are perfect and equal cost-effective for:

• Energy distribution in industrial and commercial buildings.
• Connection of electrical equipment and tables.
• False floors or technical channels installations.
• Motor power lines, lighting, production machines.
• Tertiary facilities (hotels, offices, warehouses).
• Suitable for installation on cable paths, in conduits, In chute or full walls.

THE DIFFERENCE BETWEEN COPPER CLASS 2 (RIGID) VS. CLASS 5 (FLEXIBLE)

The most critical difference between Standard N2XY and RV-K lies in the conductor:

• Standard N2XY (copper class 2): class 2 conductors are common in European countries because they offer sufficient performance on fixed installations. The cable is robust but its relatively rigidness can make handling, pulling through conduits, and terminating a more labor-intensive process, especially with larger cross-sections.
• POWERFLEX® RV-K (copper class 5 flexible): Uses a class 5 flexible conductor. This design gives the cable high flexibility, making it incredibly easy to maneuver around tight corners and in complex routing scenarios.

Class 5 conductors are becoming the preferred choice for industrial installations across Europe due to their cost effectiveness, flexibility and ease of installation.

When RV-K cable is preferred?

• For easy and fast Installation: it means less physical effort and time required for your team. 
• For easier and safer cable termination: flexible strands are simpler to fit into terminals and connectors securely.
• To reduce damage risk: Less strain on the cable during installation means a lower risk of internal conductor damage, enhancing the long-term reliability.
• High-density cabling environments: In dynamic environments like modern data centers, Class 5’s flexibility allows for easier updates and scalability, making it a more suitable choice for high-density cabling. 

POWERFLEX® RV-K vs STANDARD N2XY CABLES 

Here’s a quick comparison table to highlight the key advantages:

INDUSTRY INSIGHT: THE GLOBAL PUSH FOR EFFICIENCY

Worldwide, the industrial cable market is prioritizing solutions that reduce total project costs. A recent study highlighted that labor can account for up to 60-70% of total installation costs. Choosing cables that enable faster installation, like RV-K designs, is no longer a luxury but a strategic necessity to stay competitive on a global scale. 

Planning your next cable project?

When specifying cables for your next tender or project, defaulting to “N2XY” cable can lead to receiving the less flexible class 2 option. Always specify “POWERFLEX® RV-K” or “N2XY flex” in your documentation to ensure you get the performance, ease of installation, and cost-saving benefits you’re counting on, and ask your cable distributor for a quote on POWERFLEX RV-K.

And if your project needs an extra fire safety performance (or is subjected to CPR C_ca or B2_ca public places requirements) ask for TOXFREE® N2XH flex option.

POWERFLEX® RV-K stock & logistics 

A superior product is only as good as its availability. We understand that project timelines are non-negotiable. Furthermore, POWERFLEX RV-K is a standard cable within our Top Cable manufacturing program. To provide the fastest possible delivery, we maintain a comprehensive stock of POWERFLEX® RV-K cables in the most popular cross-sections, ready for immediate dispatch in our central European warehouse.

For the complete and detailed datasheet with full mechanical and electrical characteristics, please request POWERFLEX® RV-K cable specification.

Get to know a bit more about Top Cable sustainable manufacturing, quality laboratories and European logistics here.

Typical cross-sections of POWERFLEX® RV-K in Stock

We consistently stock a wide range, including (but not limited to):

Single core or multi-core cables:

• RV-K 1, 2, 3, 4, 5 x 1.5 mm² to 10 mm² (for standard lighting and power).
• RV-K 1, 2, 3, 4, 5 x 16 mm² to  95 mm²  (for industrial circuits and distribution).
• RV-K 1, 2, 3, 4, 5 x 120 mm² to 185 mm² (for heavy power applications).
• RV-K 1, 2, 3, 4, 5 x 240 mm² to 630 mm² (for main distribution and high-load circuits).

Thanks to our strategic logistics network, we guarantee fast and reliable delivery all across Europe. Whether your site is in the UK, Ireland, Germany, France, Spain, Portugal, the Netherlands, Italy, Eastern European countries or Scandinavia, you can count on getting the high-quality POWERFLEX® RV-K cables you need, when you need them.

EXPERIENCE THE POWERFLEX® RV-K DIFFERENCE

Want to learn more about why POWERFLEX® RV-K is becoming the preferred choice for industrial installations across Europe? Read our dedicated blog post about POWERFLEX® RV-K.

Upgrade to the flexibility, durability, and efficiency of POWERFLEX® RV-K. Get a competitive quote today and see how we can power your project forward. Our team is ready to advise on the perfect cable solution for your specific needs.