Start with the complete buying decision
Pure (solid) copper is required for standards-compliant network cable, PoE and any link that must pass a category certification test. Copper-clad aluminium (CCA) is a lower-cost conductor with higher resistance that can be acceptable for some non-critical, short or budget applications — but it does not meet the solid-copper requirements of the cabling standards. Fluke Networks warns that CCA is sometimes sold as category cable even when it does not meet those requirements, so the conductor must be stated explicitly.
1. What the two conductors are
Pure copper conductors are solid or stranded copper. CCA is an aluminium core with a thin copper cladding. Because aluminium has higher electrical resistance than copper, CCA carries less current and shows greater signal loss over distance for the same gauge.
2. Performance, distance and PoE
Higher resistance affects two things buyers care about: insertion loss over the full link length, and heat under Power over Ethernet. For full-length links and PoE-powered devices, solid copper is the safe specification; CCA's resistance can push a link out of spec or run warmer under load.
| Requirement | Pure copper | CCA |
|---|---|---|
| Category certification (Fluke) | Meets solid-copper requirement | Not compliant with standards |
| PoE / powered devices | Recommended | Higher resistance, more heat |
| Full-length permanent links | Recommended | Risk of failing loss limits |
| Short, non-critical, budget runs | Works | Sometimes acceptable |
3. Compliance and disclosure
The cabling standards specify solid copper for category-rated balanced cable. Fluke Networks notes that CCA products are sometimes presented as category cable even when they do not meet the relevant requirements, so a category label alone is not proof of conductor material — the RFQ and sample approval must state the conductor.
State the conductor for every line and confirm it on the approved sample so it cannot be silently substituted in production.
4. Cost — and where it is false economy
CCA is cheaper by weight, which is why it appears in budget cable. But if the link must pass certification, power a device or run the full distance, a CCA saving can become a failed installation. Weigh the unit saving against the role of each link before deciding.
Procurement checklist
- 01Whether the link must pass a category test
- 02PoE / powered-device requirement per run
- 03Full installed length of each link
- 04Conductor material stated per line in the RFQ
- 05Conductor confirmed on the approved sample
- 06Written no-substitution agreement for production
Common mistakes
- Assuming a category label proves the conductor is copper
- Using CCA on PoE or full-length permanent links
- Comparing only unit price, not link role
- Leaving the conductor unstated in the RFQ
- Accepting a silent conductor substitution in production
Questions buyers ask next
Is CCA ever acceptable?
For some short, non-critical or budget runs it can be, but it does not meet the solid-copper requirements of the cabling standards and should not be used where certification or PoE matters.
Technical source: Fluke NetworksHow do I stop CCA being substituted for copper?
State solid copper in the RFQ, confirm it on the approved sample, and require a written no-substitution agreement before production.
Sources & further reading
Official material used for the factual statements on this page.
- Fluke NetworksCopper Clad Aluminum (CCA) Cables
- Fluke NetworksChoosing the Test Limit – DSX CableAnalyzer