A property manager refreshing a mid-rise Toronto office floor in 2026 usually inherits a riser full of Cat5e and a ceiling grid full of Cat6, both pulled when a gigabit drop to each desk was the ceiling anyone cared about. The refresh that forces the cabling question is almost never the desks. It is the wireless. A Wi-Fi 7 access point on the ceiling wants a 10 Gbps backhaul and 60 watts of power down the same cable, on a run that can reach the far corner of the floor at close to the full 100 metres. That one requirement is what moves the honest answer from Cat6 to Cat6A.

What the category numbers mean on a 100 m run

Cat5e is specified to 100 MHz and carries 1 Gbps across the full 100 m channel. It will also carry 2.5GBASE-T to 100 m in most installations and 5GBASE-T over shorter, clean runs, which is why it has lasted as long as it has. Cat6 doubles the tested bandwidth to 250 MHz and carries 1 Gbps to 100 m, but its 10 Gbps rating is conditional. 10GBASE-T on Cat6 is supported only to somewhere between 37 and 55 m, and only when alien crosstalk from neighbouring cables in the bundle stays low. Cat6A is specified to 500 MHz and carries 10GBASE-T across the full 100 m channel with the tighter alien-crosstalk limits, PS ANEXT and PS AACR-F, written into TIA-568.2-D. Those limits are the reason a Cat6A jacket is thicker, the conductors are usually 23 AWG instead of 24, and many constructions add a separator spline or a foil layer.

The word that matters on a building floor is channel. A Wi-Fi 7 backhaul run is not a 5 m patch on a bench. It is a horizontal run from a floor switch to a ceiling access point that can land anywhere inside the 90 m permanent link plus the patch cords the structured-cabling rules allow. Cat6 cannot hold 10 Gbps at that distance, so specifying Cat6 for a Wi-Fi 7 refresh buys a cable that meets the speed only if every access point happens to sit close to the rack, which is not how ceilings get laid out.

Why Wi-Fi 7 is the thing that broke Cat6

Older access points were comfortable on a 1 Gbps uplink because a single radio rarely pushed more than a gigabit of real traffic. Wi-Fi 7, the 802.11be amendment, changes the arithmetic with 320 MHz channels, 4096-QAM, and multi-link operation, and one high-tier access point can move well past 1 Gbps of aggregate throughput to the clients under it. The uplink stops being comfortable and becomes the bottleneck. Vendors answered by putting 2.5 Gbps, 5 Gbps, and 10 Gbps uplink ports on their Wi-Fi 7 hardware, and the moment the uplink is 10 Gbps the cable feeding it has to certify for 10GBASE-T at the installed length. That is a Cat6A specification on any run past the mid-fifties of metres, and it is a Cat6A specification on shorter runs too once the bundle gets dense enough that alien crosstalk eats Cat6’s margin.

This is the convergence behind the 2026 guidance from technical installers, including Toronto suppliers such as Cablify, that Cat6A is now the new-construction and major-refresh baseline rather than a premium upgrade. The point is not to chase the highest number on the box. The point is to match the cable to a 10 Gbps uplink that the wireless side now ships by default.

PoE++ is the second reason, and it is about heat

The cable to a ceiling access point carries power as well as data, and the power side has climbed as fast as the data side. 802.3af delivered about 12.95 W to the device, 802.3at, known as PoE+, raised that to 25.5 W, and 802.3bt added Type 3 at 51 W to the device over all four pairs and Type 4 at 71.3 W to the device, drawn as up to 90 W at the switch port. Outdoor Wi-Fi 7 access points with their extra radios, and PTZ cameras with heaters and motors, sit in the 60 to 90 W band, which puts them on Type 3 or Type 4, the tier most installers call PoE++.

Pushing that current through copper makes heat, heat raises insertion loss, and rising insertion loss is the mechanism that turns a marginal cable into a failed link. The heat rise is worst in the middle of a tightly packed bundle inside a conduit or a closed tray, where the cables in the core cannot shed heat to the air. Cat6A’s 23 AWG conductors have lower DC resistance than the 24 AWG conductors common in Cat5e and many Cat6 cables, so they dissipate less power as heat at the same current and run cooler in a full bundle. TIA published bundle-derating guidance in TSB-184-A because 90 W runs in large bundles can lift conductor temperatures enough to matter, and the larger conductor is the simplest way to stay inside the limit without thinning out the bundles.

Shielding, jackets, and where Canadian installs differ

A building refresh runs cable through several environments in one job, and the jacket rating has to match each one. A run inside a wall cavity to a desk uses a CMR riser jacket. A run through a drop-ceiling plenum that doubles as the return-air path needs a CMP plenum jacket, which is a code requirement rather than a preference in most commercial occupancies. A run from a building to a parking-lot camera or a detached structure needs an outdoor UV-stable jacket, and a buried run between structures needs a direct-burial or gel-filled construction. Cat6A is sold in all of these jacket ratings, and getting the jacket wrong fails more inspections than getting the category wrong.

Shielding is the other decision. An unshielded U/UTP Cat6A handles most interior runs, but a refresh that shares tray space with electrical conduit, or a dense access-point bundle where alien crosstalk is the limiting factor, is better served by an F/UTP construction with a foil screen drained to a grounded patch panel. The shield only works if it is bonded at the panel. A foil that floats adds cost and nothing else.

Cut to length, terminated, and certified

The value of a made-to-length Cat6A patch on the rack side of the link is that it is cut from a known spool of 23 AWG copper, terminated to shielded or unshielded RJ45 plugs that match the keystone at the far end, and tested end to end on a certifier that reports insertion loss, return loss, NEXT, and PS ANEXT against the TIA-568.2-D limits. A 2 m patch is cut at 2 m rather than a 5 m cable coiled behind the switch, and the coil is worth naming because a tight coil in a warm rack adds the same heat-and-loss problem the bundle derating addresses, in miniature.

A Canadian shop building Network Cables to length can match the conductor gauge, the shield type, and the jacket rating to the run rather than forcing one off-the-shelf cable into every position. For a 2026 building refresh feeding Wi-Fi 7 access points over PoE++, that means Cat6A in a plenum or riser jacket for the horizontal runs, PoE-rated Cat6A shielded patch cords on the rack, and a certifier report that proves each channel holds 10 Gbps at the length it was actually installed. customcable.ca stocks Cat6A patch cables and bulk Cat6A spools in those jacket and shield variants, the category that matches what a Wi-Fi 7 and PoE++ refresh asks of the cable. Cat6 still earns its place on a short, low-power gigabit drop, but the run that carries a 10 Gbps uplink and 90 W of power to a ceiling is a Cat6A run, and specifying anything less is specifying a link that meets the requirement only by accident of where the access point happened to land.