Electrical Cables for Saudi Projects: Copper vs. Aluminum, XLPE vs. PVC, and What to Specify

Buying cable by a short description such as “4×25 mm² copper” or by brand name alone leaves important engineering fields undefined. The same nominal size can differ in conductor construction, voltage rating, insulation and sheath system, armor, fire performance, installation basis, and the standard it was designed and tested to.

Cable sizing is an engineering calculation. Design current, voltage drop, short-circuit withstand, installation method, grouping, ambient or soil conditions, thermal insulation, and conductor temperature rating can all affect the required cable. Procurement should preserve those requirements and make supplier deviations visible.

Copper or Aluminum?

IEC 60228 covers copper, aluminum, and aluminum-alloy conductors in insulated cables and specifies nominal cross-sectional areas, conductor resistance requirements, and conductor classes. That means conductor material should be assessed together with the cable design, cross-section, resistance, and conductor class—not as a standalone label.

Copper has higher electrical conductivity than aluminum, so the same electrical requirement can often be met with a smaller copper conductor. Aluminum is lighter and can be economical in some larger sizes, but terminations, lugs, connected equipment, and installation details must be suitable for the conductor material.

Do not substitute aluminum for copper, or copper for aluminum, from price per metre alone. The change can affect conductor size, outside diameter, cable routes, lugs, terminations, voltage drop, short-circuit performance, and connected equipment. Any alternative needs engineering review and approval.

XLPE vs. PVC Insulation

XLPE and PVC are common insulation systems, but the choice is not made from climate alone. Each material has different cable constructions and operating limits, and the applicable cable standard and manufacturer determine conductor temperature limits, insulation thickness, testing, and installation requirements.

IEC 60502-1 covers extruded-insulation power cables for rated voltages of 1 kV and 3 kV within its scope and specifies construction, dimensions, and test requirements. If the design calls for XLPE, PVC, or a specific sheath system, the supplier's offer should state the complete cable designation rather than only “LV cable.”

Nominal Cross-Section Is Not a Diameter Check

A value such as 2.5, 25, or 240 mm² is a nominal conductor cross-section, not a number that can be verified by measuring one outside diameter with a caliper. Conductors can be solid or stranded and can use different conductor classes. IEC 60228 controls conductor resistance and construction requirements for the applicable cable type.

If cable quality is in doubt, do not rely on drum weight or a single strand diameter as the acceptance test. Use manufacturer documentation, required test reports, conductor resistance and dimensional checks from the applicable standard, and formal receiving or laboratory testing where the project quality plan requires it.

Voltage Rating and Number of Cores

State the cable's rated voltage, number of cores, neutral arrangement, and earthing requirements from the design. A single-core cable is not a direct substitute for a multicore cable, or vice versa; installation, armor, electromagnetic effects, and termination arrangements differ.

When Is Armor Required?

Armor can provide mechanical protection in selected buried, exposed, or industrial routes, but it is not a universal requirement for every buried or outdoor cable. Armor material and construction follow the cable design, installation method, and mechanical-risk assessment.

Single-core AC cables need particular attention to metallic armor and screens because induced currents and heating can become relevant. Do not change armor or metallic-screen construction without the cable designer's requirement.

Fire Performance: “Fire-Rated Cable” Is Too Vague

Flame propagation, smoke, halogen emissions, and circuit integrity during fire are different performance questions covered by different tests. The fire strategy and circuit function should identify which performance is required instead of relying on a generic commercial label.

IEC 60331 tests circuit integrity under specified fire conditions. Passing a flame-spread test does not automatically mean a cable keeps a circuit operating during fire, and the reverse is also true. Life-safety circuits should use the exact test and performance specified by the approved fire design.

Saudi Conformity Requirements

Saudi conformity requirements depend on the exact product category and the applicable technical regulation. SASO applies the Gulf Technical Regulation for Low Voltage Electrical Equipment and Appliances, and some products may also fall under routes such as the Saudi Quality Mark. A generic “SASO approved” statement is not sufficient evidence by itself.

Ask for the cable standard and edition, manufacturer data, the conformity evidence required for that product, and the test reports required by the project. Large projects may also require routine, type, or factory test documentation as part of submittal approval.

What Every Supplier Offer Should State

For a like-for-like comparison, require each offer to state:

• Conductor material, conductor class, and nominal cross-section.
• Number of cores and rated voltage.
• Insulation, sheath, and complete cable construction.
• Armor or metallic screen where required, including the material and construction.
• Specified fire-performance tests.
• Product standard and applicable edition.
• Required length and packaging: drum, coil, or another defined format with allowed tolerances.
• Lead time, warranty, conformity documents, and required test reports.

How to Compare Price Correctly

Cable pricing is affected by conductor metals, cable construction, quantity, market conditions, and delivery terms. A fixed “Saudi market price” should not be published without a current source. For live quotations, align the technical construction first and then compare price per metre or required length on the same delivery basis.

A cheaper offer is not equivalent if it changes copper to aluminum, XLPE to PVC, removes armor, uses a different standard, or drops the required fire performance. Those are specification differences, not discounts.

Bennahub can keep conductor material, size, voltage, insulation, armor, fire performance, and standards tied to the same cable line item so technical exceptions appear next to price and lead time during supplier comparison.

FAQs

Is copper always better than aluminum?

No universal answer. Copper has higher conductivity, while aluminum can be lighter and suitable in some designs. The correct choice comes from the electrical calculation, conductor size, terminations, route, connected equipment, and approved total cost.

Is XLPE always better than PVC in Saudi Arabia?

No. XLPE has different thermal properties and is widely used in power cables, but insulation selection follows the cable design, installation method, project requirements, and standard. Do not choose insulation from city temperature alone.

How do I verify conductor size?

Cross-section is nominal and is verified through the conductor and cable standard, including resistance, construction, and dimensional requirements. A single outside-diameter measurement or drum weight is not a complete acceptance test.

Does every flame-resistant cable maintain circuit operation during fire?

No. Flame propagation and circuit integrity are different performance properties. If a circuit must remain operational during fire, the fire specification should state the required circuit-integrity test.

The right cable is not a brand name or the lowest price. It is a defined electrical and mechanical construction whose compliance can be demonstrated. Fix conductor, size, voltage, insulation, armor, fire performance, standard, and documents before comparing offers.