Today, with copper prices soaring, how can one avoid falling into the trap of inferior cables

In early 2026, international copper prices continue to surge and frequently hit new highs. The London Metal Exchange (LME) 3-month copper futures have repeatedly exceeded $13,000–$14,000 per tonne, with cash settlement prices fluctuating around $13,600–$13,800 per tonne. COMEX copper has approached $6 per pound (approximately $13,200 per tonne). In China, the main Shanghai copper contract has climbed above 113,000 CNY/tonne and is currently oscillating between 107,000–110,000 CNY/tonne. Compared to early 2025, prices have risen by more than 40%.

Why is the price of copper so high?

In simple terms: demand explosion + supply bottleneck.

This “Dr. Copper” rally is primarily driven by exploding demand from AI data centers, renewable energy (solar, wind, energy storage), electric vehicles, global grid upgrades, and structural supply shortages.

High copper prices directly increase the cost of structured cabling systems. Copper conductors account for 60%–80% of the total cost of network cables (Cat5e, Cat6, Cat6A, Cat7, etc.). Small and medium-sized manufacturers face intense pressure, creating fertile ground for substandard and counterfeit products in the market. Once inferior cables are installed in large-scale global projects—data centers, office buildings, hospitals, airports, smart buildings, or 5G/6G base stations—the consequences can include network latency, transmission failures, insufficient PoE power delivery, electromagnetic interference, and even safety hazards.

Common Ways Substandard Cables Are Passed Off in Structured Cabling Projects

1.Copper-Clad Aluminum (CCA) sold as solid pure copper (Solid CU)

CCA has 55%–60% higher resistance than pure copper, leading to greater signal attenuation, poor high-frequency performance, inability to reliably support 10 Gbps (Cat6A or higher), severe PoE heating, and easy oxidation/breakage.

2.Undersized conductor diameter

Labeled as AWG23/24 (Cat6/Cat6A), but actual diameter is smaller (insufficient cross-sectional area), resulting in excessive resistance.

3.Poor twisting and shielding

Uneven pair twisting, thin or missing shielding layers, causing failure in NEXT, PSNEXT, return loss, and other key parameters.

4.Fake certifications and brands

Counterfeit UL, ETL, TIA-568, ISO/IEC 11801, CE, RoHS markings; packaging with poor printing quality or spelling errors.

5.Thinned insulation/jacket

Reduced withstand voltage, aging resistance, and flame-retardant performance.

These issues are especially prominent in international projects, where different regions have strict standards: UL/ETL in the US, ISO/EN in Europe, GB/T or CCC in China, and multi-standard compliance for global projects. Failing inspection can lead to costly rework, claims, and project delays.

How to Effectively Identify Substandard Cables? Combine On-Site Checks with Professional Testing

1. Simple Physical Inspection (No Tools Needed – Good for Initial On-Site Screening)

lWeight comparison

For the same specification and length, pure copper cables are noticeably heavier than CCA (aluminum is much lighter).

lConductor scratch test

Gently scrape the conductor with a knife blade or fingernail. Pure copper shows consistent reddish-purple color; CCA reveals shiny silver aluminum underneath.

lBend/flexibility test

Pure copper can be bent repeatedly without breaking; CCA is brittle and prone to cracking or snapping.

lMeasure conductor diameter

Use a caliper to check single-strand diameter (e.g., Cat6A ≈ 0.57 mm / AWG23). Significant deviation indicates a problem.

lMagnet test (auxiliary)

Steel-core (CCS) cables will be attracted by a magnet; pure copper and aluminum will not.

Pure Copper vs CCA Conductor Comparison (Cross-Section & Scratch Test Examples):

2. Basic Electrical Testing

Use a digital multimeter to measure DC resistance.

For the same length and specification, pure copper resistance is significantly lower than CCA.

Example: Cat6 single pair 100 m ≈ 7–9 Ω (pure copper); CCA will be clearly higher.

3. Professional Performance Certification Testing (Highly Recommended for Large/Critical Projects)

Use certified testers such as Fluke DSX-8000/DSX-602, Keysight, Ideal, etc., and test according to TIA-568.2-D or ISO/IEC 11801 standards for Permanent Link or Channel:

lKey parameters: Insertion Loss (Attenuation), Near-End Crosstalk (NEXT), Power Sum NEXT (PSNEXT), Return Loss (RL), ACR-F, PSACR-F, etc.

lCat6A must pass 500 MHz testing; counterfeit cables often fail at higher frequencies.

lGenerate a qualified test report (including margin and limit values) as acceptance proof.

Fluke DSX Series Cable Certification Testers (Professional Tool Examples):

4. Certification & Procurement Controls

lVerify certification databases

Check UL website by file number; verify ETL/Intertek online; avoid fake labels.

lPackaging & printing

Genuine products have clear printing, no spelling errors, production batch/date, and standardized brand logos (e.g., ZORA,Belden, CommScope, Panduit, Legrand, Schneider, Siemens, Corning, etc.).

lProcurement strategy

Choose reputable international brands through authorized distributors. Require Certificate of Conformity (CoC), factory test reports, and third-party SGS/Intertek reports. For large projects, consider factory audits or sample third-party lab testing.

lGlobal project note

Pay attention to regional differences (e.g., US CM/CMR/CMP flame ratings, European LSZH low smoke zero halogen). Prefer cables that meet multiple standards simultaneously.

Conclusion: High-Quality Cabling Is a Multiplier for Project Success

Copper prices are expected to remain elevated for some time. Structured cabling forms the foundation of data centers, smart buildings, and industrial IoT—there is no room for compromise. Inferior cables can lead to network reconstruction, equipment damage, or even safety incidents, with rework costs far exceeding any initial savings.

In global projects, it is always better to pay a little more for certified, high-quality pure copper cables. One extra test on site can save a lot of trouble later. A safe, reliable, and high-performance cabling system is the true cornerstone of digital transformation.