Can You Staple Cat6 Cable?

The cable is pulled through the basement and the stapler is in your hand. So can you staple Cat6 cable to the joists and move on? You can, but only with the right fastener and a light touch. A staple that pinches the jacket can turn a good run into one that fails a test.

Why crushing a Cat6 cable matters

Cat6 performance depends on geometry. Each of the four pairs is twisted at its own rate, and the spacing between the two conductors in a pair sets its impedance. Keep that geometry steady along the run and the signal travels cleanly.

A staple driven tight squeezes the jacket and pushes conductors closer together at one spot. That creates a small impedance change, and part of the signal reflects from it. On a certification test the result shows up as poor return loss or near-end crosstalk, even though every wire is still connected.

Campus cabling specs treat deformation as real damage. Florida A&M University’s university cabling standards guidelines limit bundles to 50 cables because heavier bundles “may cause deformation of the bottom cables within the bundle and degrade cable performance.” If the weight of other cables can do that, a staple driven home certainly can.

Staples for Ethernet cable: what to use and what to avoid

Not every staple belongs on data cable.

• Insulated staples: a plastic saddle over a metal leg, sized for round voice, data and video cable. This is the only staple style to consider for Cat6.
• Plastic one-hole clips and nail-in clips: a round loop that holds the cable without clamping it. Good for exposed runs along a wall or joist.
• Bare wire staples, including flat crown staples from a general stapler: avoid them. The thin crown concentrates force on a narrow line, and a stray leg can enter the jacket.

Size matters as much as style. The staple should fit over the cable with a little room, so the cable can still slide slightly under the crown. A staple that only fits when it bites into the jacket is too small.

How to staple Cat6 without damaging it

If staples suit the job, a careful technique keeps the cable safe:

1. Choose an insulated staple whose crown clears the jacket diameter.
2. Drive it by hand with a light hammer, or use a stapler made for low-voltage cable with the depth set shallow.
3. Stop when the staple holds the cable against the wood. The jacket should keep its round shape.
4. Check by hand: the cable should slide a little under the crown, not be pinned in place.
5. Put one cable under each staple. Stacking cables under a single crown presses the lower one.
6. Keep staples clear of bends, and never staple at the bend itself.

If you miss and drive a leg into the jacket, do not pull the staple and hope. Mark the spot and test the run before the wall closes.

How to secure Ethernet cable to joists and studs

How you secure Ethernet cable to joists depends on the direction of the run. Running parallel to a joist, fasten along the side of the joist rather than the bottom edge, where it is less likely to be hit later. Running across joists, either drill holes through the center of each joist or fasten to a running board nailed across the bottoms.

In walls, a cable that passes through bored holes in the plates and studs needs little stapling; one fastener near each box keeps slack from pulling into the cavity. Leave a service loop at the box and at the rack, as covered in our guide to how to pull cable from a box without kinks.

Spacing is a judgement call on residential framing, but commercial specs give a benchmark. The Florida A&M guidelines support horizontal cable at a maximum of 48 to 60 inch intervals and never let it rest on ceiling panels. Where the run goes through a fire-rated wall or floor, seal the hole as described in how to firestop low voltage penetrations.

J-hooks, bridle rings and hook and loop instead of staples

Once a run carries more than a couple of cables, staples stop making sense. A J-hook screwed to a joist carries the whole bundle on a wide, rounded surface. Our comparison of J-hooks vs cable tray covers spacing and fill for commercial ceilings.

Bridle rings are a lighter option for small bundles in a basement or crawl space. Hook and loop straps hold the bundle to the hook or to a fixed point without the risk of a zip tie pulled too tight. The same rule applies inside the rack, as set out in our network rack cable management guide.

Keep data cable off electrical cable. Do not share staples, holes or hooks with power wiring, and keep the separation your project spec or local code requires.

Testing a run after stapling

A basic continuity tester checks that every wire connects pin to pin. It will not see a crushed spot, because the conductors are still continuous. One installer on a garage forum described a typical case: a single staple through a Cat6 run, and a tester showing dim lights on all four jacks.

To find crushing, you need a qualification or certification tester that measures return loss and crosstalk, ideally with a distance-to-fault reading. Our guide on how to test an Ethernet cable explains the three levels of testing and when each one is worth it.

• Test every run before drywall goes up, when a damaged section is still easy to reach.
• If the jacket is dented, cut or flattened, replace the run. Campus specs such as Florida A&M’s call for horizontal cable in one continuous length, so a splice is not a repair.

Where to find cable management supplies

The wire and cable management category covers the supplies that keep runs supported and bundled, and bulk wire lists the cable itself, both in the wire, cables and connectors division. If you are still choosing the category, see Cat6 vs Cat6A. For pricing and availability, ask your sales representative through the Bursma contact page or the Grand Rapids area branch, or open a Bursma dealer account.

Frequently asked questions