Walk into any New Zealand electronics shop and the Ethernet cable shelf runs from Cat5e patch leads to Cat8 cables wrapped in braided nylon at five times the price. For a home, almost all of that range is either too little or far too much. Cat6 is the right answer for nearly every run in an NZ house in 2026, and this guide explains why, when Cat6a earns its extra cost, what Cat8 is actually for, and how to buy and terminate cable without wasting money.
If you are new to the topic, our plain-English Ethernet guide explains what the wired connection gives you over Wi-Fi, and our home network setup guide covers where the cables should go.
Key takeaways
- Buy Cat6 for in-wall runs. It carries gigabit and 2.5 Gbps over any household distance and 10 Gbps over runs up to about 55 m, for a few cents more per metre than Cat5e.
- Cat6a only pays off if you plan 10 Gbps to a NAS or office over long runs; Cat7 is not an Ethernet standard, and Cat8 is a 30 m data-centre cable with no benefit at home.
- Solid-core cable for walls and ceilings, stranded for patch leads. Unshielded (U/UTP) is right for homes; shielded cable needs proper earthing to help at all.
- Keep any run under 90 m in the wall plus patch leads, away from mains cables, and use outdoor-rated cable in conduit between buildings.
- A 305 m box of solid Cat6 is roughly NZ$150–$250 in 2026, and a 2 m Cat6 patch lead NZ$5–$15. Braided Cat8 leads are paying for the jacket, not the speed.
In this guide
Cat5e vs Cat6 vs Cat6a vs Cat8
The category number describes how much bandwidth the cable is tested to carry over a full 100 m channel, which sets the speeds it is guaranteed for. Cat5e is rated for gigabit, Cat6 for gigabit at 100 m and 10 Gbps over shorter runs, Cat6a for 10 Gbps at 100 m, and Cat8 for 25 and 40 Gbps over 30 m. Every category uses the same RJ45 plug and works with every Ethernet device, so there is no compatibility question, only a speed-and-distance one.
| Category | Rated at 100 m | 10 Gbps reach | Typical NZ price (Sept 2026) | Buy it for |
|---|---|---|---|---|
| Cat5e | 1 Gbps (2.5 Gbps usually works) | Not rated | 305 m box NZ$120–$180 | Nothing new; existing runs are fine to keep |
| Cat6 | 1 Gbps; 2.5 and 5 Gbps | About 55 m | 305 m box NZ$150–$250; 2 m lead NZ$5–$15 | Every in-wall run and patch lead in a home |
| Cat6a | 10 Gbps | 100 m | 305 m box NZ$300–$450; leads NZ$10–$25 | Long 10 Gbps runs to a NAS, office or server |
| Cat7 / Cat7a | 10 Gbps (ISO only, not an Ethernet standard) | 100 m | Leads NZ$10–$30 | Skip; “Cat7” leads with RJ45 plugs are effectively Cat6a |
| Cat8 | 25/40 Gbps to 30 m | 30 m max channel | Leads NZ$15–$50 | Data-centre patching; no home device can use it |
Two practical notes. First, Cat5e already in your walls does not need replacing: it carries gigabit and, in most homes, 2.5 Gbps too, which covers Fibre Max and Hyperfibre 2000. Second, the “Cat7” and “Cat8” patch leads on NZ shelves are sold on the number; they work exactly like a Cat6 lead on any home device, so buy them only if you like the braided jacket.
Pick the Right Cable
Tell the tool what the run is for, how long it is and where it goes, and it recommends a category and construction with a rough NZ cost.
Ethernet cable picker
Choose speed, distance and environment; get the category, solid or stranded, shielding advice and an estimated cost for the run.
Costs use September 2026 NZ prices for boxed solid cable and pre-made leads and exclude jacks, plates and labour. 10 Gbps over Cat6 assumes a well-terminated run.
Solid vs Stranded, and Shielded vs Unshielded
Boxed cable for walls uses solid copper conductors, which carry signal further and punch down cleanly onto keystone jacks and patch panels, but crack if they are flexed repeatedly. Patch leads use stranded conductors, which bend happily but are limited to short lengths. Use each where it belongs: solid in the walls, stranded from the wall plate to the device. Avoid copper-clad aluminium (CCA) cable, which is sold cheaply online, fails PoE and does not meet the standard.
Unshielded twisted pair (U/UTP) is the correct choice for a house. Shielded cable (F/UTP or S/FTP) only reduces interference when the shield is earthed at the patch panel with shielded jacks and plugs throughout; an unearthed shield can make things worse. The only home cases for shielded Cat6a are a run forced alongside mains cabling or through a workshop with big motors.
How Far Can Ethernet Run?
The standard channel is 100 m: 90 m of solid cable in the wall plus up to 10 m of patch leads at the ends. No New Zealand house comes close, and even a run to a sleepout at the back of a section is usually 30–60 m. Beyond 100 m, or between buildings on rural properties, use a fibre link or an outdoor point-to-point wireless bridge rather than stretching copper; our outdoor Wi-Fi guide covers those options.
- Keep data and mains apart. Do not share holes or bundles with power cables; the wiring rules call for separation or a barrier.
- No tight bends or crushed staples. A bend radius of about four times the cable diameter keeps the pairs intact.
- Outdoors means outdoor cable. Standard PVC jackets go brittle in NZ sun within a few years; use UV-stable or gel-filled cable and conduit, and add surge protectors on runs to other buildings.
- Test before you plaster. A NZ$20 cable tester catches a mis-punched pair in seconds.
What Gaming, Streaming and 2.5GbE Really Need
Gaming cables are a marketing category. A console or PC has a gigabit port, so any Cat5e or better cable delivers everything it can accept; the benefit of the cable over Wi-Fi is steady latency, not the category on the jacket. A 4K stream uses about 15–25 Mbps, which a 25-year-old Cat5 cable would carry. Where category starts to matter is 2.5GbE and beyond: a new NAS or a 2.5G port on your router benefits from Cat6, and a 10G link between a NAS and an editing PC over a long run wants Cat6a. Our switch guide explains when to add 2.5G ports, and our gaming internet guide covers the settings that actually cut ping.
Cable for Hyperfibre
Hyperfibre 2000 needs 2.5 Gbps from the ONT to the router and on to your computer, which Cat6 (and usually existing Cat5e) handles. Hyperfibre 4000 and 8000 need 10 Gbps ports and a Cat6 or Cat6a lead between the ONT, router and PC; the short patch leads involved are within Cat6’s 10 Gbps reach. Our modem router guide lists the router ports to match.
Buying and Terminating Cable in NZ
- Buy a box, not coils. Solid Cat6 comes in 305 m pull boxes from PB Tech, electrical wholesalers and trade suppliers; a 100 m box suits a small job.
- Terminate on keystone jacks with a punch-down tool, using the T568A or T568B colour order consistently at both ends. Crimping RJ45 plugs onto solid cable is the classic source of flaky links.
- Use a patch panel in the cupboard for more than four runs, and label every port.
- Buy pre-made patch leads in the lengths you need; they are cheaper and more reliable than home-crimped ones.
- Test each run, then plug in and check the link speed shows 1000 Mbps or 2.5 Gbps on the switch.
Our Verdict on Ethernet Cables
Our take
- Solid unshielded Cat6 in the walls, stranded Cat6 patch leads at the ends. That covers gigabit, 2.5 Gbps and short-run 10 Gbps for the life of the house.
- Cat6a only for long 10 Gbps runs; never Cat7; Cat8 only if you enjoy paying for braid.
- Keep existing Cat5e, it is fine. Spend the money on keystones, a patch panel and a tester instead.
- Outdoor cable and surge protection for anything that leaves the house.
Prices are NZ$ incl. GST ranges seen at New Zealand retailers and wholesalers in September 2026 and vary by brand and quantity. Cable ratings follow the TIA and ISO/IEC channel specifications; real-world 10 Gbps over Cat6 depends on termination quality. Nicegear is independent and has no paid placements.
Sources and further reading
FAQs
Is Cat6 or Cat8 better for home use?
Cat6. No home device has a 25 or 40 Gbps port, which is what Cat8 is built for, and its 30 m limit makes it a data-centre patch cable. Cat6 handles gigabit, 2.5 Gbps and short-run 10 Gbps for far less.
Should I replace my Cat5e cable with Cat6?
Not unless a run is faulty. Existing Cat5e carries gigabit and usually 2.5 Gbps, which is enough for Fibre Max and Hyperfibre 2000. Use Cat6 for any new runs.
How long can an Ethernet cable be?
100 m for a full channel: 90 m of solid cable plus 10 m of patch leads. For 10 Gbps, Cat6 is limited to about 55 m and Cat6a to 100 m. Longer links between buildings should use fibre or a wireless bridge.
Do I need shielded Ethernet cable?
Almost never at home. Shielding only helps when it is earthed at the patch panel with shielded jacks and plugs throughout. Unshielded Cat6, kept separate from mains cables, is the right choice for houses.
Does a better Ethernet cable reduce ping for gaming?
No. Any working Cat5e or better cable gives the same latency; the improvement comes from using a cable instead of Wi-Fi. Ping is set by your connection and the distance to the game server.
What is the difference between Cat6 and Cat6a?
Cat6a is tested to twice the bandwidth (500 MHz) and guarantees 10 Gbps over the full 100 m, where Cat6 manages 10 Gbps only to about 55 m. Cat6a is thicker, stiffer and roughly twice the price, so it is worth it only for long 10 Gbps runs.
