Commercial Office Network Cabling: A Planning Checklist

Cabling is the part of an office network that stays in the walls for the longest time, and it is the hardest part to change after the ceilings close. Most of the decisions that set its cost and quality are made before anyone pulls a cable. Work through this checklist with your floor plan in hand and you will get quotes that compare cleanly and an install that matches how you use the space.

1. Count the devices, room by room

Walk the floor plan and list every device that needs a wired connection. Wi-Fi covers laptops and phones, but the access points themselves need cable, and so do most cameras, door readers, desk phones, and printers.

• Workstations: many offices plan two drops per desk so a phone or dock can be added later
• Wi-Fi access points in the ceiling
• Printers, copiers, and label printers
• Security cameras and access control readers
• Conference room displays, video bars, and wall-mounted TVs
• Reception, break room, and any room likely to change use

Add a few spare drops in rooms that may be repurposed. A drop added during the main install costs far less than a separate service call later, because small jobs carry a trip minimum.

See also: How much network cabling costs in Boise

2. Choose the IT closet before anything else

Every cable runs from its outlet back to a patch panel in the IT closet, so the closet location decides how long the runs are. Under the TIA-568 standard, a copper channel is limited to 100 meters (about 328 feet) end to end, including patch cords. On a large floor or a long building, you may need a second closet connected to the first with fiber.

A small office can often use a 12U wall cabinet in a ventilated closet with a dedicated 20A circuit. Offices with a server, NVR, or phone system usually need a floor rack with clearance front and back. The closet should lock, and it should not double as a storage room for supplies that block airflow.

See also: Network installation and IT closet setup

3. Pick the cable grade

For most offices the choice is Cat6 or Cat6A. Cat6 handles 1 Gbps comfortably and 10 Gbps only on runs up to about 55 meters. Cat6A is rated for 10 Gbps over the full 100 meters and handles high-power PoE in large bundles better. A common split is Cat6A to access points and Cat6 to desks.

See also: Cat6 vs Cat6A for a Boise office

4. Confirm pathways and cable ratings

How cable gets from the closet to each outlet affects both labor and code compliance. Ceiling type is the biggest factor: open drop-tile ceilings are quick to work in, while hard-lid drywall ceilings mean cutting access holes and patching them.

• Air-handling (plenum) ceiling spaces require plenum-rated cable
• Vertical runs between floors require riser-rated cable or better
• Cable should ride on J-hooks or cable tray, never on ceiling grid wires
• Penetrations through fire-rated walls need firestopping after the cable is pulled
• Masonry or historic walls that can't be opened usually need surface raceway

5. Agree on labeling and documentation

Decide the labeling scheme before the install so the numbers on the wall plates, the patch panels, and the floor plan all match. Each cable should be labeled at both ends. At turnover you should receive a printed map showing every drop and its port, so an IT provider can find a connection without tracing it with a tone generator.

6. Require certification testing

A continuity tester only shows that the wires are connected. A certification tester measures each run against the specification for its category and saves a report. Ask for those reports at turnover; they are your proof that the cabling performs as specified.

7. Set the schedule around the building

On new construction or a tenant improvement, low-voltage rough-in happens after electrical rough and before drywall, so the cabling contractor should walk the job one to two weeks ahead. In an occupied office, plan the noisy work and the cutover for after hours or a weekend. Order the internet service early and confirm where the carrier will terminate it, since the demarc often lands somewhere other than your closet and needs to be extended.

See also: New construction low-voltage rough-in

8. What to send with a quote request

The more of this you send, the more accurate and comparable the quotes will be.

• A floor plan with drop locations marked
• Your device count from step 1
• Ceiling type in each area (drop tile, hard lid, open structure)
• Where the IT closet is, or where you would like it
• Target dates and any after-hours requirements
• Who supplies the rack, switches, and patch panels
• Whether an IT provider or MSP will configure the network

When the quotes come back, check that each one states the cable grade, whether certification testing is included, who supplies the patch panel and rack, and whether cleanup and patching are included. A quote that looks much cheaper than the others is usually missing one of those items.