Projects involving international installations now demand cables that are halogen-free and Low Smoke Zero Halogen (LSZH), where fire safety, equipment protection and compliance with regulations are all important. When planning projects overseas, knowing how to identify halogen-free cables is not just a matter of labels; it’s a matter of knowing that these cables ensure a lower release of toxic gas, smoke density and corrosion during fire, which affects the safety of the occupants and security of the assets in data centers, transportation centres, high-rises and industrial centres.
With more than 15 years of global manufacturing experience in high performance industrial cables, some even using Halogen free material, we can assist our clients in getting specifications to match across different borders and to prevent rework expenses and assure excellent performance.
What “Halogen-Free” and “LSZH” Mean in Standards Terms
LSZH cables are designed to comply with high standards: halogen free (usually HCl<0.5%), low smoke (high light transmittance in IEC 61034 test) and low toxicity. Some of the most important verification tests are:
- For IEC/EN 60754-1/2 it determines the amount of halogen acid gas, the pH and conductivity.
- Smoke density (IEC/EN 61034-1/2) in a 3m cube.
- Flame propagation resistance for single and bunched cables, IEEE standard IEC 60332 series.
These IEC/EN tests are the technical backbone, beyond marketing claims, for cross-border specifications.
Europe – LSZH as a Regulatory Baseline in Buildings and Transport
CPR and EN Fire-Classification for Construction Cables
Cables in the EU are rated as Euroclasses (such as B2ca, Cca) according to the Construction Products Regulation (CPR) EN 50575 and EN 13501-6. These classes are often desired, particularly in public buildings, evacuation routes and high risk areas, and are frequently required by the use of LSZH compounds. In some countries, such as Germany, the Netherlands and Ireland, there is a requirement to achieve greater performance in high-rise buildings and transport infrastructure.
National Practices and PVC Phase-Out Trends
Standard PVC has been successfully replaced in certain applications in Europe because of its smoke and toxicity issues. For projects in rail, airports and commercial developments, LSZH becomes the default as it is expected complied to regulatory and insurance requirements.
North America and Other Regions – Owner-Driven Rather Than Universal Mandate
U.S. and Canada – NEC, UL/CSA, and Project Specifications
Not every NEC has specified that LSZH is required; however, UL/CSA listings and owner specifications often call for LSZH in data centers, mission-critical facilities, enclosed spaces and transit projects to safeguard sensitive electronics and personnel.
Asia and Emerging Markets
The pace of adoption is increasing, such as the adoption of standards like the Chinese subway standard GB 50217, hospitals, and data centers, and the increasing demand on the international projects. Even when local codes permit halogenated alternatives, IEC/EN codes are used to harmonize multinational ownership.
Owner and OEM Requirements – The Hidden Drivers of Halogen-Free Specs
Operators of large data centers, transit systems, hospitals and global OEMs have their own internal standards based on IEC tests, and will often prohibit PVC in areas where there are no local minimums, even in occupied spaces. Demand for recyclable, halogen free solutions increases with sustainability measures and ESG targets.
Building a Halogen-Free Cable Spec That Travels Across Regions
Start with a Common Technical Backbone
Rely on IEC/EN 60754, 61034 and 60332 tests for consistency across the board globally.
Add Region-Specific Layers
- EU: CPR Euroclass + national requirements.
- North America: UL/CSA listings and project LSZH clauses.
- Asia: Local standards with IEC references.
Document Owner-Specific Requirements Clearly
Make clear zones (server rooms, Emergency exits) and acceptance criteria, to avoid misunderstandings among teams.
Practical Steps for Engineers and Project Managers
- Identify areas of risk on all project sites.
- Determine LSZH requirements based on IEC/EN tests.
- Add regional codes and owner standards.
- Provide clear criteria in RFQs and look at supplier test reports.
- Implement “local adaptation to a global standard” strategy.
This ensures less compliance gaps and aids in smoother procurement and installation.
The cables used in our company, Hulk Electric (Dongguan) Co., Ltd. are specially developed for use in challenging applications such as industrial automation, robotics, and infrastructure. We offer everything from detailed certifications (UL, CE, TÜV, RoHS, REACH) to custom features to ensure that international projects perform in the same manner. Share your parameters and our team will provide customized solutions, addressing both global and local needs.
