Choosing Ethernet cable is not simply a matter of choosing the highest category available. The cable should suit the network speed, installation and expected service life.
Practical example: wiring a new office
Plan, label and test the complete channel rather than treating cable as an isolated product.
Scenario: A new office requires 48 desk outlets, wireless access points, VoIP phones and IP cameras.
The design works backwards from outlet locations to patch panels and switches. Permanent horizontal cabling is kept separate from replaceable patch leads. Cable category, shielding requirements, PoE use, pathways, labelling and rack termination are decided before installation.
Verification: Completed links are tested and documented. A simple continuity result should not be confused with certification against a cabling performance standard.
Common mistakes and selection checklist
Common mistakes
- Treating patch leads, permanent horizontal cable and installation cable as interchangeable.
- Ignoring cable length, termination quality, pathway separation and PoE heat considerations.
- Calling a basic continuity test a certification test.
What happens if you get it wrong?
A link can pass simple pin-to-pin continuity yet still fail to deliver the expected Ethernet performance. Poor labelling and termination also make faults expensive to locate later.
Selection checklist
- Choose the cable category and shielding approach for the required application.
- Keep permanent links and patch leads within the intended structured-cabling design.
- Use compatible jacks, patch panels and termination methods.
- Label both ends and document outlet-to-panel mapping.
- Test installed links to the level required by the project.
CAT6
CAT6 is widely used for business Ethernet installations and can support high-speed network connections over appropriate distances when the complete installation meets the required specifications.
CAT6A
CAT6A is designed for higher-performance Ethernet applications and provides additional capability compared with CAT6. It is often considered where 10GbE and future network requirements are part of the design.
The installation matters
Cable category is only one part of the link. Patch panels, keystone jacks, patch leads, connectors and installation practices should be appropriate for the intended cabling category.
Think about the future
Structured cabling can remain in place for many years. If higher network speeds are likely to be introduced during the useful life of the installation, choosing suitable cabling at the beginning can avoid unnecessary replacement later.
| Consideration | CAT6 | CAT6A |
|---|---|---|
| General business Ethernet | Common choice | Suitable |
| Higher-speed network planning | Depends on installation and distance | More suitable for higher-performance designs |
| Future-proofing | Good for many installations | Greater headroom for higher-speed requirements |
| Installation | Generally easier to handle | Can require more installation space and care |
- Required network speed
- Link distance
- Existing infrastructure
- Future network requirements
- Patch panel and connector category
- Available installation space
Return to Cabling & Connectivity
Confirm the exact product specification, supported configuration and compatibility before ordering. Platform generation, firmware, licences and optional components can change what a product supports.