Q1 Projects Start in Q4: How to Build a Better Cabling Materials List

January projects rarely stall because of labor. They stall because a box of jacks is missing, the patch panels are one short or the cable on site has the wrong fire rating. The fix is a materials list built in Q4, while there is still time to order, check and stage everything.

Here is a step-by-step method, with formulas and a worked example you can adapt to any project.

Step 1: Count drops by type and location

Start from the floor plan and count every cable drop, not just every desk. A typical office mix includes:

• Workstations: often 2 drops each, for a computer and a phone or second device
• Wireless access points: 1 or 2 drops each, depending on the model. Newer access points may need more, as covered in preparing your cabling for Wi-Fi 7
• Cameras, printers and signage players: 1 drop each
• Conference rooms: drops for the display, the table and any room controller

Write the total by type. It becomes the base for every line that follows.

Step 2: Calculate cable footage

For each run, add the horizontal path, the vertical drops down walls and a service loop at each end. A common practice is around 10 ft of slack at the rack and about 1 ft at the outlet. Average those runs, then apply a 10% waste factor:

Total cable (ft) = number of drops × average run length (ft) × 1.10

Boxes needed = total cable ÷ 1000, rounded up

Two checks matter here. First, no permanent link should exceed 295 ft (90 m). If some runs do, add a closet closer to those areas or plan a fiber backbone, as explained in why small commercial spaces are moving to fiber. Second, the tail end of each box is often too short for a full run. Plan to use those remnants on the shortest drops.

Step 3: Count connectors and termination hardware

• Keystone jacks: 1 per drop at the outlet, plus about 10% spares
• Patch panel ports: 1 per drop, plus 20% to 25% for growth, rounded up to full panels
• Wall plates: 1 per location, matched to the number of ports
• Patch cords: 2 per drop, a short one at the rack and a longer one in the work area, plus about 10% spares
• RJ45 plugs: only for devices terminated directly on a plug, such as some cameras and access points, plus spares

Worked example: 48 drops, 120 ft average run

The example assumes 24 locations with 2 drops each. Swap in your own drop count and average run, and the same formulas hold.

Step 4: Check compatibility before you order

Most materials-list mistakes are not about quantity. They are about parts that do not work together.

• Category. Keep cable, jacks, panels and cords in the same category. One Cat5e component limits a Cat6 link.
• Conductor gauge and type. Cat6 often uses 23 AWG conductors. Confirm jacks and plugs accept that gauge, and choose plugs for solid or stranded wire as needed. See solid vs. stranded Ethernet cable.
• Fire rating. Use plenum cable in air-handling spaces and riser cable between floors. Our Cat6 plenum guide explains the difference.
• Wiring standard. Choose T568A or T568B and write it into the project notes. Mixing them is one of the most common RJ45 termination errors.
• Color code. Assign jack or cable colors by service, such as data, voice, cameras and access points.
• Faceplate style. Confirm standard or decorator plates, and where surface-mount boxes are needed.

Step 5: Add the items people forget

• Labels for both ends of every run and every patch panel port
• Cable ties, hook-and-loop wraps and installation accessories
• A working cable tester, such as the Steren Ethernet cable tester, with fresh batteries
• A few extra patch cords for day-one moves and last-minute desk changes

Step 6: Order early and stage by phase

Place the order in Q4 so backorders surface while there is still time to adjust. Stage materials by floor or phase, and label each bin with its area. Design for the next expansion too. Our guide to cabling that won't need rework in 12 months covers that planning.

Ordering for several projects? A business account gives approved contractors wholesale pricing.

FAQ

How much Cat6 cable do I need? Multiply the number of drops by the average run length, then add 10% for waste. Divide by 1000 and round up to get the number of boxes.

How many spare keystone jacks should I order? About 10% above the drop count covers termination mistakes and last-minute additions.

How much growth should patch panels allow? A 20% to 25% margin is a common target, rounded up to full 24-port panels.