Cat6, Cat6A or fibre? Choosing structured cabling for a new office

Structured cabling is usually installed once and expected to last 15 years or more, through several generations of computers, phones and Wi-Fi. Choosing the right type now avoids expensive re-cabling later.

Cat6

Cat6 supports Gigabit Ethernet comfortably and 10 Gigabit over short runs. It's cost-effective and suits most desk connections in small and medium offices.

Cat6A

Cat6A supports 10 Gigabit over the full 100-metre distance and handles higher-power PoE better. It's the safer choice for Wi-Fi access points and for offices expecting growth.

Fibre

Fibre is used for backbone links between comms rooms and floors, and for long distances. It's immune to electrical interference and supports very high speeds.

A typical design

For most new offices we recommend:

• Cat6 or Cat6A to desks and printers
• Cat6A to Wi-Fi access points and cameras
• Fibre between floors and comms rooms
• Two data points per desk for flexibility
• Spare capacity in every cable route

Installation quality matters

Cable is only as good as its installation. Correct bend radius, separation from power, tidy containment, labelling and certification testing make the difference between a network that works and one that causes intermittent faults.

PoE and why it matters

Power over Ethernet delivers power and data on the same cable to Wi-Fi access points, IP phones, cameras and access control readers. Newer high-power PoE standards push more current through the cable, which creates heat in large bundles. Cat6A handles this better, which is one reason it's recommended for access point and camera runs.

Questions to ask your installer

Before approving a cabling quote, ask:

• Which cable category and brand will be used?
• Will every link be certified with a tester, and will we get the results?
• How will cables be labelled and documented?
• Is containment included, and how is it separated from power?
• What warranty applies to the installation?
• How many spare points and spare capacity are included?

Why cabling decisions last

Computers are replaced every few years, switches every five to seven and Wi-Fi access points every four to six, but cabling often stays in place for fifteen years or more. Re-cabling an occupied office means disruption, ceiling access and significant cost. That's why it makes sense to invest in quality cabling and a little extra capacity during a fit-out, when walls and ceilings are open. The difference in cost between a basic and a well-specified installation is small compared to the cost of redoing it later.

Comms rooms and patching

Structured cabling terminates in patch panels in a comms cabinet or room, where patch cords connect each point to network switches. Good design leaves space for growth, uses colour-coded and labelled patch cords, and includes cable management so the cabinet stays tidy and airflow isn't blocked. Separate panels for data, voice and building systems such as CCTV and access control make the layout easy to understand and maintain.

Cabling for building systems

Modern buildings run more than computers on their network. CCTV cameras, access control readers, Wi-Fi access points, digital signage, meeting room equipment and even lighting controls often use structured cabling and PoE. Plan these points during the design, not as an afterthought, so ceilings and walls include cabling in the right places. Grouping building systems on their own patch panels and network segments keeps them organised and secure, and makes it easy for different contractors to work without disturbing the main office network.

Documentation

Insist on test results and a labelled floor plan at handover. It makes future moves and troubleshooting fast.