Two boxes of Cat6 look identical on the shelf. One costs 40 percent less. Here is what you are actually buying.
Quick answer: CCA is copper-clad aluminium — aluminium wire with a thin copper coating. It looks and terminates like copper but has roughly 60 percent of copper's conductivity, fails certification on long runs, breaks at terminations, and overheats under Power over Ethernet load. Structured cabling standards require solid bare copper. CCA does not meet them.
Every contractor in India has faced this moment. Two quotations for Cat6 cable, both claiming the same category, both in 305 metre boxes, and one is dramatically cheaper. The temptation on a price-sensitive project is obvious, particularly when the client is comparing bids line by line.
The difference is almost always the conductor. And because the conductor is buried inside the jacket, it is the one specification a buyer cannot verify by looking at the box.
Copper-clad aluminium is exactly what the name describes: an aluminium core with a thin layer of copper bonded to the outside. The copper layer is typically a small fraction of the conductor's cross-section — enough to make the wire look like copper, solder like copper and take a punch-down termination like copper.
Aluminium is cheaper than copper and about one third the density. Both facts push the manufacturing cost down substantially, which is where the price gap comes from. Nothing about the process is illegal, and CCA has legitimate uses in some applications. Horizontal structured cabling is not one of them.
Aluminium conducts at roughly 60 percent the efficiency of copper. A CCA conductor at the same nominal gauge therefore carries meaningfully higher DC resistance than its bare copper equivalent.
On a short patch run this is invisible. On a 90 metre horizontal run — the standard maximum for Cat6 — the accumulated resistance pushes insertion loss beyond the limits the category allows. The cable will often still pass traffic, which is why the problem goes unnoticed at handover, but it will fail formal certification and it will show up later as intermittent link drops on the longest runs in the building.
Aluminium work-hardens. Bend it repeatedly and it becomes brittle rather than remaining ductile the way copper does. Every termination involves bending: dressing the pairs into a keystone jack, seating conductors in a punch-down block, routing into a patch panel.
The failure mode is nasty because it is delayed. The termination tests fine on the day. Six months later, after thermal cycling in a ceiling void and the vibration of an air handling unit, the conductor fractures inside the jack. The fault is intermittent, moves when anyone touches the patch panel, and takes a technician a full day to trace.
Copper and aluminium in contact in the presence of moisture form a galvanic couple, and the aluminium corrodes. Every CCA termination is a copper-aluminium junction by definition, because the jack contacts are copper alloy and the conductor core is aluminium.
In coastal installations, in humid conditions, or anywhere condensation reaches the termination, this produces a slowly increasing contact resistance. Performance degrades gradually rather than failing outright, which makes it particularly hard to diagnose.
This is the failure that matters most, and it is getting worse as PoE loads increase. PoE++ delivers up to 90 watts down a single cable. Power through resistance produces heat, and higher resistance produces more heat for the same delivered power.
A single cable in free air sheds that heat easily. Fifty cables bundled in a conduit do not — the cables in the centre of the bundle are insulated by the ones around them. The temperature rise in a CCA bundle under full PoE load can be several times that of an equivalent bare copper bundle.
The consequences run from accelerated jacket embrittlement and further increased resistance through to, in severe cases, genuine fire risk. Anyone specifying cable for a building carrying PoE cameras and access points should treat this as a safety question rather than a performance one. It is also worth pairing the conductor decision with a deliberate choice of jacket material, since both affect fire behaviour.
The nick test. Strip a short length and scrape the conductor surface with a blade. Bare copper is uniformly reddish through its full cross-section. CCA reveals silver-grey aluminium beneath a thin copper skin. This is definitive and takes ten seconds.
The weight test. Aluminium is roughly one third the density of copper. A 305 metre box of genuine bare copper Cat6 typically weighs in the range of 18 to 22 kilograms. A CCA box of the same dimensions will feel noticeably lighter. If a supplier's box weight is well below the range, ask why.
The magnet test is not reliable — neither copper nor aluminium is magnetic, so this popular suggestion tells you nothing.
The flex test. Bend a single conductor back and forth. Copper tolerates repeated flexing before fatiguing. Aluminium hardens quickly and snaps after relatively few cycles.
The paperwork test. Ask the supplier to state the conductor material in writing on the quotation. Reputable manufacturers state it plainly. Sellers of CCA typically use vague phrasing — "high conductivity conductor", "premium grade copper alloy", "copper conductor" without the word bare — or simply omit the specification. Ambiguity in the quotation is itself the answer.
TIA and ISO structured cabling standards specify solid bare copper conductors for horizontal cabling. CCA does not comply. This is why CCA cable is rarely sold with a clear standards claim: making one would be a false statement.
For any project with a specification document, a consultant sign-off, or a warranty from a cabling system vendor, CCA will not pass. Certification testing with a proper field tester will catch it on the longer runs. Discovering this at handover, with ceilings closed and containment full, is an expensive way to learn the lesson.
Consider a hundred-drop office. Cable might be twelve percent of the project cost, with labour, containment, panels, jacks, switches and testing making up the rest. A forty percent saving on cable saves under five percent of the project.
Now consider the downside. If the cable fails certification, the remedy is to pull it out and replace it — repeating the entire labour cost, not just the cable cost, plus the disruption of reopening finished ceilings. A single re-pull wipes out the saving many times over. If instead the fault emerges eighteen months later as intermittent drops, the cost lands as recurring service calls and a damaged relationship with the client.
The economics only work if nothing goes wrong. On a cable rated for a decade of service, that is an unusual bet to make.
Strip a conductor and nick the surface with a blade. Bare copper is the same reddish colour throughout. CCA shows silver aluminium under a thin copper skin. You can also weigh a 305 metre box: bare copper Cat6 typically weighs 18 to 22 kilograms while CCA of the same size weighs noticeably less because aluminium is roughly one third the density of copper.
No. TIA and ISO structured cabling standards specify solid bare copper conductors for horizontal cabling. Copper-clad aluminium does not meet these standards, which is why CCA cable is typically sold without a compliance claim or with vague wording that avoids naming the conductor material.
Aluminium has roughly 60 percent the conductivity of copper, so a CCA conductor of the same gauge has significantly higher resistance. Higher resistance means more heat for the same delivered power. In a bundled run carrying PoE, that heat has nowhere to escape, and the result is accelerated jacket degradation and, in severe cases, a fire risk.
Nakoda's Cat6 UTP LAN cable uses solid bare copper conductors. We state the conductor material on our specification sheet because we think buyers are entitled to know what is inside the jacket before the cable is in the ceiling.
If you are comparing quotations and the numbers do not add up, understanding what actually drives Cat6 pricing in India will usually explain the gap. For project quantities and current rates, send us a bulk enquiry.
