Structured Cabling 101: Cat6 vs Cat6A vs Fibre for Nairobi Offices

Structured cabling is the foundation of every building's network — and it is one of the most under-appreciated decisions in an office fit-out. Unlike switches and routers which can be upgraded in hours, cables go into walls and floors and stay there for 10–15 years. Getting this decision right from the start pays dividends for the life of the building.

Cat6: the reliable standard

Cat6 (Category 6) supports 1 Gbps at distances up to 100 metres and 10 Gbps at up to 55 metres. For most Nairobi offices, this is more than sufficient for current needs. It is the most cost-effective option and our default recommendation for SMEs with straightforward requirements.

Best for: Offices up to 200 users, standard LAN/WAN connectivity, PoE devices (IP phones, access points).

Cat6A: the future-proof choice

Cat6A (Augmented Category 6) supports 10 Gbps at the full 100-metre run length and is required for multi-gigabit PoE (PoE++), Wi-Fi 6E access points, and 10G server connections. The cable is physically larger (typically 8mm vs 6mm for Cat6), requires larger conduit and trunking, and costs approximately 35–50% more per metre installed.

Best for: New builds where the infrastructure will not be revisited for 15+ years, data centres, server rooms, high-density wireless environments, and any location where PoE++ devices will be deployed.

Fibre optic: for backbone and long runs

Fibre is the clear choice for backbone cabling (between floors, between buildings, and from the ISP demarcation point to your main distribution frame). It is immune to electromagnetic interference, supports distances of kilometres rather than metres, and provides essentially unlimited bandwidth headroom.

Best for: Building backbones, inter-building connections, server room uplinks, and anywhere runs exceed 100 metres.

Our recommendation for new installations

We typically recommend a mixed approach: Cat6A for all horizontal runs (from patch panels to desk outlets), multimode fibre OM4 for vertical risers and building backbones. This provides a clean upgrade path to 25G and 40G when the time comes, without touching the installed cabling.

Questions to ask your cabling contractor

• Will you provide FLUKE or equivalent test results for every run?
• Is the installation certified to TIA-568 or ISO 11801?
• What is the warranty on materials and workmanship?
• Are your installers BICSI certified?

Every structured cabling project we deliver includes FLUKE DSX-600 test certification on every single run. If a run fails, we re-pull it — no exceptions. The certification report goes to the client as part of the handover documentation.