You’re at the final stage of locking in your cable specs, and now you have to choose between armored and unarmored MV cables. On the surface, they don’t seem that different but this decision has real consequences.

The MV cables you select, and the MV cable suppliers in the UAE you decide to work with, will influence how easy the installation is, how much protection your system has on-site, and how reliable it remains over time. It’s one of those choices that can quietly affect your budget and timeline if not thought through properly.

Understanding the Structural Difference

Armored MV cables has a built-in shield. Beneath the outer jacket, there’s a layer of metal, usually steel or sometimes aluminum, that’s wrapped around the core to protect it from knocks, pressure, or accidental damage on site.

Unarmored MV cables don’t have that extra layer. What you see on the outside is essentially what’s protecting the inside. They’re lighter and easier to handle, but they don’t offer the same level of physical protection if conditions are rough.

The armor adds mechanical strength. It protects against physical damage during installation and service life. Direct burial applications and areas with impact risks benefit from this protection.

Unarmored cables work well in controlled environments. Cable trays and conduits provide the mechanical protection these cables need. The absence of armor makes them lighter and more flexible.

Where Each Cable Type Excels

Armored cables are built for tougher conditions. You can bury them directly in the ground without adding extra protection because the metal armor helps resist crushing and shields the cable from accidental impact.

They’re typically the safer choice for outdoor substations, underground distribution lines, or any route where vehicles, heavy equipment, or ongoing site activity could put stress on the cable.

Unarmored cables shine in indoor installations. Cable ladder systems and vertical risers suit these well. Reduced weight makes them easier to pull through conduits.

MV cable suppliers in the UAE stock both types because project conditions vary significantly.

Installation Factors That Drive Your Decision

Bending radius matters more with armored cables. The metal armor reduces flexibility, so you need larger bending radii. Tight corners might push you toward unarmored cables.

Termination and jointing require different techniques. Armored cables need proper earthing of the armor layer. If you’re going with armored cables, make sure your installation crews understand proper bonding and grounding requirements. The armor has to be handled correctly, or you lose the protection it’s meant to provide.

Unarmored cables make terminations simpler, but they require more care during installation. Without the metal layer, crews have to be more careful during installation. Sharp bends or pulling too hard can easily damage the cable.

Weight also matters. Armored cables are much heavier per meter, which affects drum size, transport arrangements, and the equipment you’ll need on site to lay them properly.

Selecting for UAE Environmental Conditions

The UAE presents specific challenges for MV cable installations. High temperatures, sandy soil, and coastal salt exposure all factor into cable selection.

Armored cables with proper sheath materials resist sand abrasion during direct burial. The armor provides protection against damage from rocks.

Coastal projects require careful consideration. Salt water can corrode certain armor materials. When working with MV cable suppliers in the UAE, specify corrosion-resistant armor.

Indoor installations in air-conditioned environments face fewer stresses. Unarmored cables often provide the economical solution.

Making the Right Choice

Your cable selection comes down to installation environment and mechanical protection requirements. Direct burial routes need armored cables. Protected indoor routes work with unarmored cables.

Consider the complete installation cost. Armored cables cost more per meter but might eliminate additional protection needs. Unarmored cables cost less but require protective infrastructure.

Work with MV cable suppliers in the UAE who understand local practices and conditions. They can help verify that your selection meets requirements.

Review your installation drawings. Start by looking at the route itself. Where is there a real risk of impact, pressure, or mechanical damage? And where do you need flexibility for bends or tighter spaces?

Answering those questions usually makes the choice clearer and helps you select the cable type that will perform reliably in the conditions it’s actually going to face.

FAQs

Can you mix armored and unarmored MV cables in the same project?

Yes, a lot of projects end up using both. You protect the sections that are exposed or at risk with armored cable, and use unarmored cable where the route is already well protected.

How does cable armor affect short-circuit performance?

Steel wire armor can carry fault currents and must be properly sized and bonded. The armor provides an additional fault current path, which can be beneficial but requires proper engineering analysis and earthing design to ensure safe operation during fault conditions.

What's the typical cost difference between armored and unarmored MV cables?

Armored cables typically cost 20-40% more than equivalent unarmored cables, depending on armor type and cable size. However, total installed cost includes trenching, ducting, and protection measures, which can narrow or reverse this difference based on installation method.