Cat5e vs Cat6 vs Cat6a vs Cat7: Which Network Cable?
For most homes and small offices, Cat6 is the sensible choice: it handles gigabit networks and PoE cameras with headroom, and costs little more than Cat5e. Choose Cat6a for 10 gigabit to the desk or long busy runs, and Cat7 only where a specification asks for it. Whatever the category, buy solid copper (OFC) cable, not copper-clad aluminium (CCA), for anything that carries PoE.
We stock network cable on the reel and ready-made patch leads, and supply installers across the UK. This guide explains the differences in plain terms.
Cat5e vs Cat6 vs Cat6a vs Cat7 at a glance
| Category | Typical use | Speed (to 100m) | Notes |
|---|---|---|---|
| Cat5e | Gigabit networks, PoE cameras on shorter runs | 1 Gbps | Lowest cost per metre; fine for many existing installs |
| Cat6 | New homes, offices and CCTV installs | 1 Gbps (10 Gbps on short runs) | The usual default for new work |
| Cat6a | 10 gigabit to the desk, Wi-Fi 6/7 access points, busy links | 10 Gbps | Thicker and stiffer; often shielded (U/FTP) |
| Cat7 | Projects that specify it | 10 Gbps | Fully shielded (S/FTP); needs care with earthing and connectors |
All of these work up to the 100 metre limit for an Ethernet run (90m of fixed cable plus patch leads). Speed figures are the usual standard ratings; real speed also depends on your switch, devices and how well the cable is installed.
Cat5e vs Cat6: which should I use?
Both carry gigabit Ethernet. Cat6 is built to a tighter specification, so it has more margin against interference and longer runs, which is why it is the usual choice for new installs and IP cameras. If you are adding to an existing Cat5e network, Cat5e is still fine.
Cat6 vs Cat6a
Choose Cat6a when you want 10 gigabit over the full 100m, for example to a server, a fast access point or between switches. It is thicker, so allow for bigger bend radius and fuller trunking. Mercury's Cat6a U/FTP outdoor cable is an example.
Cat6 vs Cat7
Cat7 is fully shielded, with each pair foil-wrapped and an overall braid (S/FTP). It suits projects that specify it or very noisy electrical environments. For most homes and offices, Cat6 or Cat6a does the job for less. Mercury's Cat7 S/FTP LSZH cable uses solid copper conductors.
CCA or solid copper (OFC)?
Copper-clad aluminium (CCA) cable is cheaper, but it has higher resistance, is more brittle and is not recognised by the cabling standards. For PoE cameras, access points and phones, use solid copper. Mercury's economy Cat5e and Cat6 boxes are CCA; its standard Cat5e, Cat6 and Cat6a ranges are solid OFC copper. Check the conductor line in the specification of any cable before you buy.
Indoor, outdoor and LSZH
- Outdoor (PE jacket, usually black): for runs outside or buried in duct. Do not use indoor cable outside; sunlight and damp break it down.
- LSZH (low smoke zero halogen): often required inside public and commercial buildings because it gives off less smoke and no toxic halogen gas in a fire.
Browse network cable on the reel, patch leads and connectors, or our cabling and data networking ranges.
Common questions
Is Cat6 better than Cat5e for CCTV?
Cat6 gives more margin for PoE cameras and longer runs, so it is the usual choice for new CCTV installs. Use solid copper cable, not CCA, for PoE.
Can I use Cat6a or Cat7 with normal RJ45 plugs?
Yes, but use plugs and keystones rated for the cable, as thicker conductors and shielding need the right connectors to keep the performance.
How long can a network cable run be?
100 metres in total for one Ethernet link, usually 90m of fixed cable and up to 10m of patch leads.
Do you deliver network cable?
Yes. We ship nationally from Wolverhampton. Call 01902 902251 or email sales@zenithsecurityco.co.uk for help choosing.
