LSZH cable
The LSZH cable (Low Smoke Zero Halogen) is a halogen-free, low-smoke cable, designed to limit the risks linked to smoke and corrosive gases in the event of fire. It is favored in projects where the safety of people and the protection of equipment are priorities..
ZMS Cable offers a range of LSZH cables, of the low voltage power cables (N2j, N2XCH) to flexible cables (H05Z1Z1-F, H07zz-f), suitable for public buildings, to hospitals, to data centers and tunnels.
Qu'est-ce qu'un câble LSZH ?
LSZH signifie Low Smoke Zero Halogen, or “low smoke emission, zero halogen ». It designates cables using halogen-free insulation and sheath materials, generally based on polyolefin compounds, replacing halogenated materials like PVC. In case of fire, these materials notably limit emissions of smoke and corrosive acid gases.
Quelles sont les caractéristiques d'un câble LSZH ?
An LSZH cable is distinguished in particular by three characteristics linked to its behavior in the event of a fire :
- Low smoke — reduced smoke improves visibility and facilitates evacuation.
- Free of halogens — LSZH materials do not contain halogens such as chlorine, bromine or fluorine.
- Reduction of corrosive gases — the absence of halogens limits the formation of corrosive acid gases that can damage equipment.
What types of cables LSZH offers ZMS ?
Low Voltage LSZH Power Cables
Halogen-free N2XH cable 0,6/1 kV
The N2XH cable is a rigid low voltage power cable, halogen-free and low-smoke. It is designed for fixed installations up to 0,6/1 kV, particularly in buildings subject to high fire safety requirements. Its cross-linked polyethylene insulation (XLPE) offers better thermal resistance than traditional polyvinyl chloride insulation (PVC).
The halogen-free N2XH cable particularly suitable for fixed electrical installations in public buildings, hospitals, data centers, shopping centers and other infrastructure. According to the installation conditions and project specifications, it can be installed on cable tray, in conduits or directly.
ZMS Consulting : N2XH constitutes a preferred solution for the low voltage power supply of buildings with high occupancy density or housing sensitive equipment. On the other hand, its rigid construction is less suitable for applications requiring repeated bending. In this case, and flexible LSZH cable may be more appropriate (see below : LSZH flexible cables).
| Characteristic | N2j |
| Tension nominale | 0,6/1 kV |
| Driver | Copper receipt |
| Isolation | Halogen-free XLPE |
| Sheath | LSZH (low smoke, halogen-free) |
| Flame spread standard | IEC 60332-1 |
N2XCH halogen-free cable 0,6/1 kV
The N2XCH cable is a halogen-free, low-smoke low-voltage power cable, designed for fixed installations up to 0,6/1 kV. It has XLPE insulation and a concentric copper conductor, which notably ensures a protection and grounding function.
The N2XCH LSZH cable suitable for fixed electrical installations in public buildings, hospitals, data centers, shopping centers and other infrastructure. Its construction with concentric conductor makes it particularly suitable for installations requiring additional protection and good earthing continuity.
ZMS Consulting : choose the N2XCH when the project requires a concentric copper conductor to provide grounding and additional circuit protection. For fixed installation without this specific requirement, the N2XH may be a simpler solution.
| Characteristic | N2XCH |
| Tension nominale | 0,6/1 kV |
| Driver | Copper receipt |
| Isolation | Halogen-free XLPE |
| Screen | Concentric copper conductor |
| Sheath | LSZH (low smoke, halogen-free) |
| Flame spread standard | IEC 60332-1 |
LSZH flexible cables
LSZH flexible cables combine flexibility, low smoke emission and absence of halogens. Their flexible construction facilitates connection and implementation when the wiring requires changes of direction or a certain ease of handling. They are used in different types of electrical installations, according to nominal voltage, construction and project requirements.
The ZMS range includes several types of LSZH flexible cables, with different voltage ratings and constructions. The choice of model depends in particular on the required voltage, of the shape of the cable, of the section and type of installation.
H03Z1Z1-F / H03Z1Z1H2-F — LSZH flexible cables 300/300 V
Les H03Z1Z1-F et H03Z1Z1H2-F are halogen-free, low-smoke flexible electrical cables (LSZH), with a nominal voltage of 300/300 V. They are intended for low voltage electrical installations and are particularly suitable for lighting applications and the power supply of small equipment.. Their flexible construction facilitates connection and installation.
ZMS Consulting : choose it H03Z1Z1-F when you are looking for a round LSZH flexible cable for installation without any particular space constraints. The H03Z1Z1H2-F is more suitable when available space is limited or a construction plate facilitates installation. In both cases, check the rated voltage, the conductor section and installation conditions before making your choice.
| Characteristic | H03Z1Z1-F | H03Z1Z1H2-F |
| Tension nominale | 300/300 V | |
| Driver | Classy soft copper 5 | |
| Isolation | Halogen-free LSZH | |
| Sheath | Halogen-free LSZH | Halogen-free LSZH (flat) |
| Shape | Ronde | Plate (flat) |
| Usual section | 0,5 – 0,75 mm² | |
| Flame spread standard | IEC 60332-1 | IEC 60332-1 |
H05Z1Z1-F / H05Z1Z1H2-F — LSZH flexible cable 300/500 V
The H05Z1Z1-F is a flexible multi-conductor electrical cable (2 has 5 drivers), halogen-free and low-smoke (LSZH), designed for low voltage installations up to 300/500 V. It covers general power cords and light to medium power appliance connections, indoors. It is also available in plate version — le H05Z1Z1H2-F, generally in 2 has 3 conductors — for installations where the size or aesthetics of installation is a constraint, especially under plinth, molding or fine channel.
ZMS Consulting : the H05Z1Z1-F (round shape) is the default choice for a versatile flexible cord. Opt for le H05Z1Z1H2-F (flat shape) only if the installation imposes a constraint of space or discretion.
| Characteristic | H05Z1Z1-F | H05Z1Z1H2-F |
| Tension nominale | 300/500 V | |
| Driver | Flexible copper, class 5 | |
| Isolation | Halogen-free LSZH | |
| Sheath | Halogen-free LSZH | Halogen-free LSZH (flat) |
| Shape | Ronde | Plate (flat) |
| Usual section | 0,5 – 2,5 mm² | |
| Usage type | General soft cord | Lighting, flat devices |
| Flame spread standard | IEC 60332-1 | |
H07ZZ-F — LSZH flexible cable 450/750 V
No. H07ZZ-F is a halogen-free, low-smoke flexible electrical cable (LSZH), with a nominal voltage of 450/750 V. It is designed for installations requiring both a high voltage rating, good flexibility and resistance to moderate mechanical stress. It is suitable for installations interior and exterior.
The H07ZZ-F is particularly used for powering mobile power groups, installations UPS, stage lighting and audiovisual equipment. Its LSZH construction limits smoke and halogenated gas emissions in the event of a fire.
ZMS Consulting : choose no H07ZZ-F for applications requiring flexible LSZH cable 450/750 V. It is particularly suitable for mobile equipment and applications requiring flexible connections. For the tensions of 300/300 V you 300/500 V, the series H03Z1Z1-F or H05Z1Z1-F may be more suitable.
| Characteristic | Value |
| Tension nominale | U₀/U : 450/750 V |
| Driver | Classy soft copper 5 |
| Isolation | Cross-linked LSZH compound |
| Sheath | Cross-linked LSZH compound |
| Section | Depending on configuration, until 630 mm² |
| Driver temperature | Until +90 °C |
| Installation | Indoor and outdoor |
| Mechanical resistance | Moderate mechanical constraints |
| Reaction to fire | IEC/EN 60332-3-10 |
| Main standards | IN 50525-3-21, HD 22-13, IN 60228 |
H05Z1-K — LSZH flexible wire 300/500 V
The H05Z1-K is a halogen-free, low-smoke flexible electrical wire (LSZH), with a nominal voltage of 300/500 V. It is intended for fixed wiring of low voltage electrical installations, especially in electrical panels, distribution equipment and systems. Its flexible construction facilitates connection and wiring in spaces where driver maneuverability is important. Unlike the H03/H05Z1Z1-F cable, it has no external sheath and can only be installed sous protection, for example in boxes or distribution cabinets ; it must in no case be placed directly in the open.
ZMS Consulting : choose the H05Z1-K for the fixed wiring under protection when the required nominal voltage is 300/500 V. It is particularly suitable where flexibility of the conductor is required to facilitate wiring in electrical installations. For a voltage of 450/750 V, le H07Z1-K is more suitable. If the cable must be used with an outer sheath or for an installation requiring mechanical protection specific to the cable, rather choose a LSZH sheathed flexible cable, such as the H05Z1Z1-F or the H07zz-f.
| Characteristic | Value |
| Tension nominale (Uo/U) | 300/500 V |
| Driver | Flexible copper, class 5 (IN 60228) |
| Isolation | Halogen-free LSZH (Hffr) |
| Sheath | — (single-conductor, Without outdoor sheath) |
| Usual section | 0,5 – 2,5 mm² |
| Radius of curvature upon installation | 4 × D |
| Service temperature | 0° C at 70 ° C |
| Fire classification | Dca-s2,d2,a2 |
| Product standards | IN 50525-3-31 ; IN 60228 |
| Usage type | Internal cabling of cabinets/panels |
H07Z1-K — File souple LSZH 450/750 V
Le H07Z1-K is a halogen-free, low-smoke flexible single-core electrical wire (LSZH), with a nominal voltage of 450/750 V. It is intended for fixed wiring under protection in low voltage electrical installations, especially for distribution, lighting and control circuits. Without outer sheath, it is designed to be installed in conduits, sheaths or other suitable protection systems.
ZMS Consulting : choose le H07Z1-K when fixed wiring under protection requires a nominal voltage of 450/750 V. For installation limited to 300/500 V, the H05Z1-K may be enough.
| Characteristic | Value |
| Tension nominale (Uo/U) | 450/750 V |
| Driver | Flexible copper, class 5 (IEC 60228) |
| Isolation | Halogen-free LSZH (low fire hazard thermoplastic compound) |
| Sheath | — (single-conductor, Without outdoor sheath) |
| Usual section | 1,5 – 95 mm² |
| Radius of curvature upon installation | 4 × D |
| Service temperature | -5° C at 70 ° C |
| Max temperature in short circuit | 160°C |
| Fire classification | Approx-s1,d1,a1 |
| Product standards | IN 50525-3-31 ; IEC 60228 |
| Fire test standards | IEC 60332-1-2 ; IEC 61034-2 ; IN 60754-2 ; NF C32-070/C2 |
| Usage type | Wiring of electrical panels and cabinets |
LSZH, LSOH or PVC : what differences ?
LSZH and LSOH : what a difference ?
LSZH and LSOH (Low Smoke Zero Halogen et Low Smoke Halogen-Free ou Low Smoke Zero Halogen) actually refer to the same cable technology. LSOH is an older name, still used in some countries (especially in the United Kingdom), while LSZH has established itself as the most common designation internationally. There is no technical difference between the two : an LSOH cable and an LSZH cable meet the same requirements of low smoke emission and absence of halogen.
Not to be confused with LSF (Low Smoke Fume), a similar name but which does not guarantee the total absence of halogens - checking the technical sheet remains recommended in case of doubt about a less common abbreviation.
LSZH and PVC : what a difference ?
PVC remains the most common insulation material for electrical cables, but it releases chlorine when it burns – causing the dense smoke and corrosive acid gases mentioned above. LSZH was developed as a direct alternative for environments where this risk is unacceptable.
| Characteristic | LSZH / LSOH | PVC |
| Signification | Low Smoke Zero Halogen (LSOH : equivalent name depending on the region) | Vinyl polychloride |
| Smoke broadcast | Weak | Generally higher |
| Presence of halogens | Halogen-free | Possible presence |
| Corrosive gases in case of fire | Very weak | Most important |
| Confined Space Safety | Very good | More limited |
| Typical applications | Buildings, hospitals, data centers, transports | General electrical installations |
| Cost | Generally higher | Generally more economical |
How to choose LSZH cable ?
The choice of a suitable LSZH cable is based on four successive checks, in this order :
Check the nominal voltage
The nominal voltage (U₀/U) allows you to determine the cable family suitable for the installation. Depending on the application, LSZH cables can be available in different voltage ratings, For example 300/300 V, 300/500 V, 450/750 V you 0,6/1 kV. The cable tension must be compatible with the network voltage and installation requirements.
Déterminer le type d'installation
A fixed installation (cable tray, conduit, embedding) and a mobile installation or one subject to repeated bending do not orient towards the same type of construction. A rigid low voltage cable and a flexible cable do not respond to the same mechanical constraints. This distinction directly determines the family of products to be retained..
Check security requirements
Depending on the nature of the building or infrastructure, the specifications may require specific performances in terms of reaction to fire, particularly regarding flame propagation, the emission of smoke or the corrosiveness of gases. These requirements can be defined in the specifications, project specifications or applicable regulations. So it is better to check them before selecting the cable.
Choose the appropriate construction and section
Once the nominal voltage, the type of installation and safety requirements defined, it is necessary to determine the number of conductors. The drivers section, expressed in mm², is then chosen according to the admissible current and the installation method, taking into account if necessary the voltage drop. Finally, depending on the installation environment and the risk of mechanical damage, it should be determined whether additional protection, like armor, is necessary.
ZMS Consulting — our technical teams can validate this combination directly from your specifications, to avoid going back and forth on an order.
LSZH Cable FAQ
Quelles normes s'appliquent aux câbles LSZH ?
The applicable standards are divided into three categories :
Fire behavior standards — they define the performances measured during a fire :
- IEC 60332 : flame propagation along the cable
- IEC 60754 : absence of halogenated gases and acidity of the fumes
- IEC 61034 : density of smoke emitted
Product standards — they define the construction of the cable according to its type : IEC 60502-1 for rigid low voltage cables (N2j, N2XCH), IN 50525-3-31 for flexible cables and wiring wires (H05Z1-K, H07Z1-K), and IEC 60228 for driver characteristics.
Regulatory classification (CPR) — for projects in France and Europe, the regulations Construction Products (CPR) imposes a fire reaction class (for example Cca-s1,d1,a1 or Dca-s2,d2,a2 depending on the model). This classification varies from one model to another within the same LSZH range : it must be checked individually on the technical sheet of each reference, and not deducted from the type of cable alone.
Are LSZH cables suitable for outdoor installations ?
Non, not by default. The standard LSZH formulation is optimized for fire safety in indoor environments and does not necessarily offer UV or prolonged moisture resistance. For outdoor installation, it is necessary to check the presence of specific UV protection or to opt for a sheath adapted to climatic exposure.
Why are LSZH cables more expensive than PVC cables ?
The additional cost is explained by two factors : the halogen-free polyolefin compound used for insulation and sheathing costs more to produce than standard PVC, and LSZH cables must be tested and certified according to specific standards (IEC 60332, IEC 60754, IEC 61034), which adds a compliance cost that classic PVC does not have to bear. This additional cost is generally offset by the reduction in the risk of fire and damage to equipment..
Un câble LSZH a-t-il une durée de vie différente d'un câble PVC ?
An usage normal, the lifespan of an LSZH cable is comparable to that of a PVC cable equivalent, generally estimated between 20 et 30 years depending on installation conditions. The difference is not in the lifespan in normal operation, but in the behavior in case of fire — this is the criterion, not longevity, which motivates the choice of LSZH on a project.
Our professional services
By choosing high quality overhead cables, you offer your teams and facilities a higher level of security — and this is precisely what ZMS services aim to guarantee.
ZMS designs and produces tailor-made cables according to your technical specifications, with customization of the marking, Colors and packaging. Our products can be adapted to meet international standards (GB, IEC, BS, NFC, ASTM, FROM, etc.) and the specific requirements of each project.
All cables are tested before shipment and comply with CE certifications, IEC and ISO. Detailed test reports can be provided upon request to ensure the reliability and safety of your installations.
ZMS cables are carefully packaged on wooden spools, corrugated cardboard boxes or metal drums. Ends are tightly sealed with plastic wrap or BOPP to prevent moisture. Exterior marking can be personalized with waterproof materials.
We offer flexible and fast logistics solutions to more than 130 pays :
- Maritime : 20ft or 40ft containers depending on volume.
- Land : Local or regional delivery.
- Air : Option available for rush orders.
We also provide all necessary export documents : commercial invoice, packing list, certificate of origin and customs documents.
Our engineers and advisors support you in choosing the cables best suited to your installations. We offer comprehensive consulting services, including technical assistance and project management, to ensure every step of your order is covered professionally.
ZMS offers two options for your electrical projects :
- Option A (led by ZMS) : Sending engineers and a supervision team to site to provide technical advice, installers and final tests. Travel expenses, accommodation, per diem and translation are to be expected.
- Option B (local subcontracting) : Collaboration with qualified local companies for installation, with technical training, On-site supervision and compliance verification provided by ZMS.
