Most disputes about a cabling installation happen months after the installer has left. Something stops working, nobody can establish what was installed or where it runs, and the cost of finding out falls on the client.
Almost all of it is preventable at handover. Here is what a complete handover pack contains, and why each item matters.
Test results in native format
Every permanent link should be tested and the results supplied. That much most installers manage. The detail that matters is the file format.
Ask for results in the tester’s native format, not just a PDF summary. Fluke testers produce .flw or .lsx files that open in LinkWare and contain the full trace for every link, including insertion loss, return loss, NEXT and the margin against the standard. A PDF gives you a pass or fail. The native file tells you how close to failing a link was.
That distinction matters because a link passing with 0.3dB of margin and a link passing with 4dB of margin are very different assets. One will be the first thing to fail when you add load or the building warms up. You cannot see that in a PDF.
You should also expect the results to record the tester model, the calibration date, the standard tested against and the ambient conditions.
Labelling that matches the paperwork
Every outlet, patch panel port, cable and cabinet should be labelled, and the labelling should match the test results and the drawings exactly. BS EN 50174 and TIA-606 both set out labelling conventions, and any consistent scheme is better than none.
The test is simple. Pick an outlet at random, read the label, and find that identifier in the test results and on the drawing. If you cannot do that in under a minute, the documentation is not finished.
As-installed drawings
Not the design drawings. The drawings as the system was actually installed, showing outlet positions, cable routes, containment, cabinet locations and any deviation from the original design.
Deviations are normal. Buildings do not match their drawings, and routes change on site. What matters is that the changes are recorded, because an undocumented route is a route somebody will drill through.
Cabinet and patching schedules
A record of what is in each cabinet, what each patch panel port connects to and how the patching is arranged. This is the document that saves the most time in day to day operation, and it is the one most often missing.
Warranty documentation
If the system is covered by a manufacturer warranty, you should receive the certificate or registration confirmation, not just a verbal assurance that it is covered. Manufacturer warranties are registered by the installer after submission of test results, and registration either happened or it did not. We explain how these schemes work, and what quietly invalidates them, in what a 25 year cabling warranty actually covers.
Check the certificate names your site and states the term and what is covered.
Component and material schedule
What was actually installed. Manufacturer, part numbers, cable type and category, outlet and panel types. This matters when you extend the system later, because mixing components across manufacturers is one of the common ways a warranty is invalidated.
A named point of contact
Who to call, and what is covered if you do. Obvious, and routinely absent.
Electrical work already does this
Electrical installations have this discipline built in. Under BS 7671, new electrical work is handed over with an Electrical Installation Certificate and a schedule of test results, and existing installations are assessed through periodic inspection and an EICR. The Wiring Regulations were updated again this year, and the NICEIC guide to Amendment 4 is a good introduction to what has changed.
There is no reason a cabling installation, which now often carries power as well as data, should be handed over with less. It is why we hand over electrical and data work to the same standard, and why every project in our case studies was tested and documented before we left site.
The cabling installation handover checklist
If you are accepting a cabling installation, ask for these seven things:
- Test results in native tester format, with calibration and ambient data
- Labelling consistent with results and drawings
- As-installed drawings
- Cabinet and patching schedules
- Warranty certificate or registration confirmation
- Component and material schedule
- A named support contact
Ask for them before final payment rather than after. The paperwork is easy to produce while the job is live and remarkably difficult to obtain once the team has moved to the next site.
Why installers resist
Some do not produce this because it takes time they did not price for. Some do not produce it because the installation would not survive the scrutiny. A full set of native test results is an auditable record of workmanship, and not every installer wants one to exist.
That is precisely why you should ask for it.
We hand over full documentation on every installation as standard, including native test results and as-installed drawings. If you have inherited a system with no records, we also survey and document existing installations. Get in touch to discuss it.