CAT6 vs CAT6A: Which Should You Cable Your Office With?

The Short Version

CAT6 reliably carries 1 Gbps to 100 m and 10 Gbps only over short runs (up to ~37–55 m, and only in low-interference conditions). CAT6A carries 10 Gbps to the full 100 m and has tighter alien-crosstalk control. If your cabling needs to outlast two or three switch refreshes — and it should — CAT6A is the safer specification for new work.

When CAT6 Is Enough

• Short-life fit-outs or leased space you will exit within a few years
• Runs that are and will stay well under 55 m, with 1 Gbps the ceiling
• Tight budgets where the saving funds better switching or Wi-Fi

When to Insist on CAT6A

• Wi-Fi 6/6E and future access points — modern APs have multi-gig uplinks
• Any run you expect to push past 1 Gbps in the cabling's lifetime
• Owner-occupied buildings and long-term head offices
• Environments with heavy bundled cabling, where alien crosstalk matters

Get It Certified Either Way

Whichever category you choose, every link should be certified with a Fluke DSX to the relevant standard and the results handed over. That report is what protects the manufacturer's system warranty and gives your IT team a known-good baseline.