A structured cabling checklist for an office fit-out

Before selecting a category of cable, establish what the office actually has to support: headcount and desk density now and at the end of the lease; meeting room technology; wireless access point count; printers, screens, door controllers, cameras and sensors; and whether any of those need power over the same cable. Most specification arguments disappear once the device schedule exists.

Cat6 remains appropriate for general workstation outlets in many fit-outs. Cat6A is worth considering where higher speeds to the edge are expected, where cable runs are long and dense, or for access points and other powered devices where thermal performance in bundles matters. The honest way to decide is per outlet type rather than declaring one category for the whole floor.

Fibre belongs in the backbone: between floors, between the main equipment room and any secondary distribution rooms, and to any high-bandwidth island such as a data room or production area. Running fibre to individual desks is rarely justified in a standard office; running it between rooms almost always is, because that is the path hardest to upgrade later.

• Locate racks so that horizontal copper runs stay comfortably within standard length limits, including the real route rather than the straight line on the plan.
• Give the equipment room power, cooling, lockable access and clear working space front and rear.
• Coordinate containment with mechanical and electrical services early; basket, tray and trunking capacity should include spare space by design.
• Keep clear separation between data pathways and power runs in line with the installation practice being followed.
• Plan riser access for future additions without ceiling demolition.

Patching strategy — how many panels, in what order, with what port allocation — should be agreed before termination. Labelling should follow one convention applied identically at the outlet, the panel and the drawing, because a label that only makes sense to the installer is not documentation.

Every permanent link should be tested with a field tester and the results supplied as part of the closeout pack. Test results are the only objective evidence that the installation performs as specified.

The closeout pack should let a new IT team work on the system without a site survey: as-built drawings with outlet numbers, a port-to-outlet schedule, rack elevations, test results and a description of the labelling convention. Alongside it, plan spare capacity — outlets, panel ports, containment space and rack units — because the additions always come.

Access points are cabled devices. Confirm their positions on the reflected ceiling plan alongside lighting and sprinklers, allow a cable to each position, and consider a spare run to positions that may be added once the space is occupied and real usage is known.