Corrugated pipe
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Content: 25 Meter (€1.19* / 1 Meter)
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Content: 50 Meter (€0.80* / 1 Meter)
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Content: 25 Meter (€1.71* / 1 Meter)
Content: 50 Meter (€0.44* / 1 Meter)
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Content: 100 Meter (€0.55* / 1 Meter)
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Flexible Corrugated Conduit M16 to M40 with Drawstring – 750N Heavy Duty for Professional Electrical Installations
Discover premium flexible corrugated conduit (also known as corrugated cable conduit or electrical protection tubing) in sizes M16 to M40. These robust, high-quality conduits provide excellent mechanical protection for electrical cables in indoor, outdoor, and underground applications. With an integrated drawstring (pull wire) and 750N compressive strength, they are the go-to solution for professional electricians, electrical contractors, construction companies, renovation specialists, industrial plants, research facilities, and van conversion projects.
Key Benefits of Flexible Corrugated Conduit
The corrugated design delivers superior flexibility combined with high impact and compression resistance. These conduits effectively protect cables from moisture, mechanical damage, abrasion, and environmental stress. The pre-installed drawstring allows quick and safe cable pulling or replacement – ideal for future-proof, low-maintenance installations. All conduits comply with DIN EN 61386 standards and are suitable for concrete encasement, screed, and direct burial.
Practical Applications of Flexible Corrugated Conduit
Flexible corrugated conduits are extremely versatile and significantly enhance safety and efficiency in modern electrical systems.
In buildings, they serve as ideal empty conduit for concealed (under plaster) and surface-mounted installations in walls, floors, and ceilings. They enable neat bundling of power, data, and control cables while making future expansions or upgrades straightforward.
For outdoor and underground use, the heavy-duty 750N versions protect buried cables from excavation damage, tree roots, frost, and moisture. Typical applications include garden lighting, outdoor power points, EV charging stations (Wallboxes), and heat pump connections.
In photovoltaic (solar PV) systems, they provide reliable protection for DC and AC cables running from panels to the inverter. They are also widely used for electric underfloor heating installations.
Further key sectors include machinery and plant engineering (flexible routing of control cables), automotive and marine applications, and research facilities. In van conversions and campervan builds, they offer vibration-resistant, space-saving, and professional cable routing in tight spaces.
Technical Specifications and Size Overview
Our flexible corrugated conduits are manufactured from high-quality PE-HD or PVC, available in grey or black, and cover the most common diameters from M16 to M40. The 750N compression strength makes them suitable for concrete encasement and underground burial.
| Size | Inner Diameter (approx.) | Outer Diameter (approx.) | Compressive Strength | Typical Applications |
|---|---|---|---|---|
| M16 | 10.7 mm | 16 mm | 750 N | Indoor, thin cables, concealed installations |
| M20 | 13.8 mm | 20 mm | 750 N | Standard electrical work, indoor & outdoor |
| M25 | 17.6 mm | 25 mm | 750 N | Multiple cables, solar PV, underground |
| M32 | 24.2 mm | 32 mm | 750 N | Heavier cables, industrial, concrete |
| M40 | 31 mm | 40 mm | 750 N | High cable volume, direct burial, machinery |
Frequently Asked Questions about Flexible Corrugated Conduit
What is the difference between light-duty and 750N heavy-duty corrugated conduit?
Light-duty versions are ideal for indoor concealed or hollow-wall installations. The 750N heavy-duty conduits are medium-weight, concrete-proof, and specifically designed for underground burial and use in screed or poured concrete, offering superior protection against mechanical loads.
Which size (M16, M20, M25, etc.) should I choose?
The right size depends on the number and cross-section of the cables you need to run. M20 and M25 are the most commonly used for standard electrical installations. Use the table above for guidance on approximate inner diameters.
Is corrugated conduit with a drawstring worth it?
Yes. The integrated drawstring (pull wire) makes cable installation much easier, especially over longer runs or with multiple cables. It saves significant time and reduces the risk of damaging the conductors.
Can flexible corrugated conduit be used underground?
Yes. The 750N versions are specifically rated for underground cable protection. They resist moisture, frost, and mechanical stress while meeting relevant European and VDE standards.
What are the advantages in solar PV systems and van conversions?
In solar installations, they protect DC and AC cables from weather and mechanical damage. In campervan and van conversion projects, they provide vibration-proof, space-efficient, and professional cable routing in confined areas.
Do these conduits meet electrical installation standards?
Yes. All flexible corrugated conduits comply with DIN EN 61386 (VDE 0605) and are suitable for low-voltage installations according to DIN VDE 0100.
How do I install corrugated conduit in concrete or screed?
Secure the conduit properly before pouring, observe the minimum bending radius, and use suitable end caps or couplers. Keep the drawstring inside until final cable pulling.
Are they suitable for industrial machinery and plant engineering?
Absolutely. Their excellent flexibility and temperature resistance make them ideal for protecting control and data cables in machines, industrial equipment, and dynamic applications.
What lengths are typically available for corrugated conduit?
We offer coils in popular lengths such as 25m, 50m, or 100m, depending on diameter and project needs. Exact stock options are shown on the individual product pages.