Insights
Advantages of protection plates over traditional systems in underground electrical conduits
As experts in insulation and protection solutions for medium- and high-voltage electrical networks, we explain why protection plates have become the new industry standard.
Reading time:3 minPublished:Last updated:
For decades, underground electrical conduits have been protected with traditional systems such as bricks, slabs, or concrete blocks. Although functional, these methods are heavy, expensive, and slow to install. Today, advances in technical materials allow for a more modern and efficient alternative: high-density polyethylene (PE-HD) protection plates, which combine safety, cost-efficiency, and sustainability.
1. Easier to use
Underground cable protection plates are quick and easy to install.
They are lightweight, require no mortars or additional construction materials, and can be placed directly over the conduit thanks to their male-female interlocking system, which fits perfectly between pieces.
Result: a cleaner, safer installation with reduced work time.
2. Better information and signage
Unlike traditional systems, PE-HD plates do more than protect — they inform and warn.
Their bright yellow color and permanent black print — such as “Caution: Electrical Cables” — ensure that any operator can immediately identify the presence of an underground line.
Additionally, the text and logos can be customized to indicate the type of service, line direction, or owner company, providing clear and professional signage.
3. More economical
Replacing bricks or slabs with protection plates leads to a reduction in both direct and indirect costs.
No need for mortar or masonry materials
Savings in transport and handling time
Significantly shorter installation times
All of this translates into lower cost per linear meter and greater overall efficiency in the execution of underground electrical conduits.
4. Total continuity and safety
The male-female interlocking system of Dismaplast plates ensures perfect continuity of protection and signage along the entire line.
This avoids gaps or misalignments between pieces, minimizing the risk of accidents or damage from future excavations.
Continuous protection means a safe and long-lasting installation.
5. More resistant and durable
PE-HD (high-density polyethylene) offers superior mechanical properties compared to traditional systems:
High resistance to impacts and pressure
UV and chemical agent stability
Long-term durability, even in humid or aggressive environments
Made with recycled, halogen-free, heavy-metal-free material
This ensures a longer lifespan and greater environmental sustainability.
Comparison: PE-HD Plates vs. Traditional Bricks
FeaturePE-HD Protection PlatesTraditional Bricks / SlabsWeightLight (3–5 kg/m²)Heavy (40–60 kg/m²)InstallationFast, no mortarSlow and laboriousSignageYellow color + printed textNoneContinuityMale-female systemOpen jointsDurabilityHigh, UV stableLow, cracks or degradesTotal cost30–40% reductionHigh cost
Conclusion: the future of electrical network protection
Underground cable protection plates represent a natural evolution from traditional systems.
They offer safer, faster, and more economical installations, ensuring clear signage and superior durability.
They are the ideal choice for electrical networks, civil works, and energy infrastructure projects seeking to combine technical performance, efficiency, and sustainability.
Want more information?
Implement this system in your projects and prevent damage or risks in your installations.
Contact Dismaplast for technical advice, product sheets, or a customized quote.
