Cat 6 Cable for CCTV vs Cat5e: Which One to Run for PoE Cameras

For a home or small-shop camera system, Cat 6 cable for CCTV works well, but it is rarely necessary: good Cat5e carries the video and the PoE power of a network camera just as reliably over the same run length. The category number on the box matters far less than two other things printed on the jacket: whether the cores are solid copper, and whether the cable is rated for outdoor use. Get those two right and either category will serve your cameras well.

This article is about choosing the cable itself. If you are planning the whole system (switch or NVR, power budget, adding cameras to the app), start with our PoE camera setup guide and come back here when you are standing in the shop deciding which drum to buy.

Why the category hardly matters for cameras

A network camera sends a compressed video stream. Even a high-resolution camera on its best quality setting uses only a small part of what a gigabit network link can carry, and many cameras have a slower network port anyway. Cat5e is rated for gigabit Ethernet. Cat6 is rated for higher frequencies and can support faster links over shorter distances, which is useful between computers and servers, but a camera never comes close to needing it.

Power is the same story. PoE sends power down the same pairs (or the spare pairs) of an ordinary network cable, and the common PoE standards are designed to work over Cat5e. A camera does not draw more or less power because the cable is Cat6.

So the honest summary is:

• Cat5e is enough for nearly every single-camera run.
• Cat6 is a fine choice if the price difference is small where you buy, or if you want the extra margin.
• Old Cat5 (without the "e") may still work for one camera at a lower link speed, but treat it as something to test, not something to buy new.

What actually causes trouble on camera runs is cheap cable, poor connectors and water, not the category.

What really decides whether a cable run works

1. Solid copper, not copper-clad aluminium

Look for "solid copper", "bare copper" or "pure copper" on the box and printed on the jacket. Avoid cable marked "CCA" (copper-clad aluminium), and be suspicious of cable that is far cheaper than similar drums, because it is often CCA even when the box just says "Cat6".

Why it matters for cameras specifically: aluminium cores have higher resistance than copper, so more of the PoE power is lost as heat along the run. Data may work fine on the bench with a short patch lead, then the camera reboots at night when its infrared lights switch on and its power draw rises. A simple check on an offcut: scrape the end of a core with a knife. Solid copper is copper-coloured all the way through; CCA shows silver under the copper skin.

2. Solid core for runs, stranded only for short leads

Network cable comes in two constructions:

• Solid core (each wire is one solid conductor) is what you want for the run through walls, roof spaces and along the outside of the building.
• Stranded (each wire is many thin strands) is more flexible and is meant for short patch leads at the switch end.

Use the right connector for each. Plugs sold for solid cable and plugs sold for stranded cable are made differently, and the wrong pairing is a common cause of a connection that works for a week and then fails.

3. A jacket rated for where the cable lives

• Indoors: a standard jacket is fine. Some buildings or local rules require a particular fire rating for cable in walls or ceilings; check local rules if you are unsure.
• Outdoors, exposed to sun: buy cable marked as outdoor or UV-resistant, usually with a black jacket. Grey indoor cable goes brittle and cracks in sunlight over time.
• Underground: use cable rated for direct burial, or run outdoor cable inside a conduit. A sealed conduit is also easier to replace later.

4. Shielded or unshielded

Unshielded cable (often marked UTP) is normal for home camera systems. Shielded cable (FTP, STP or similar markings) helps where the run passes close to strong electrical noise, such as motors, large machines or lighting ballasts, but only works properly if the shield is earthed through compatible connectors and equipment. If you are not sure, use unshielded cable and keep it away from mains wiring.

How long can a Cat6 or Cat5e run be?

The usual guideline for an Ethernet run, Cat5e or Cat6, is about 100 metres from the switch or NVR port to the camera, and that includes any patch leads at both ends. The maximum length of Cat6 cable for an IP camera is the same as for Cat5e: choosing Cat6 does not let you go further.

In practice, plan with some margin:

1. Measure the real route, not the straight-line distance. Add the drops down walls, the detours round doors and windows, and a spare loop at each end.
2. If your measured route is close to the limit, assume it is over. Long runs are where CCA cable, cheap connectors and higher-power cameras (floodlights, cameras with strong infrared) show their weaknesses first.
3. If the route is genuinely too long, add a second switch part-way along or a PoE extender, placed somewhere dry and reachable. Some cameras and switches offer special long-distance modes; check the manual for your models rather than assuming.

Step by step: choosing and checking your cable

Step 1 — Confirm the camera really uses a network cable

Look at the camera's cable tail. A square network socket (sometimes with a separate DC power plug beside it) means a network camera, and this article applies. A round BNC video plug means an analog coax camera, which needs different cable; see our guide to CCTV cable installation with coax and BNC. If you are not sure which type you have, our comparison of IP network cameras and analog CCTV explains how to tell.

Step 2 — Decide how the camera gets power

• PoE camera: power and data share the network cable, so cable quality matters more. Buy solid copper without exception.
• Wi-Fi camera with a LAN port: the cable only carries data and the camera keeps its own power adapter. Almost any decent Cat5e or Cat6 cable works. Our guide to wiring a Wi-Fi camera with an Ethernet cable covers that setup.

Check the label or manual for your model: some cameras support PoE, some only have a data port, and the two can look similar.

Step 3 — Read the jacket before you buy

A good cable prints its details along the jacket every short distance. Look for the category (Cat5e or Cat6), the construction (solid or stranded, UTP or shielded), the conductor material, and any outdoor or burial rating. If the jacket prints only "Cat6" and nothing else, treat it with suspicion.

Step 4 — Buy matching connectors and a tester

Cat6 cores are usually slightly thicker than Cat5e, and Cat6 cable often has a plastic spine in the middle, so Cat5e plugs may not fit it well. Buy plugs made for your category and construction. A basic cable tester is cheap and shows straight away whether all eight wires are connected in the right order. Pre-made cables with moulded ends avoid crimping entirely, but the plug has to fit through every hole you drill.

Step 5 — Test every run before mounting the camera

With the camera on the ground at the end of its finished cable:

1. Run the tester across the cable. Every wire should light up in order.
2. Connect the camera to the switch or NVR and confirm it powers up and appears in the app.
3. Leave it running, ideally into the evening, so you see it with infrared on, which is when power draw usually rises.

Only then mount the camera and seal the joint.

Step 6 — Seal and support the outdoor end

If your camera came with a waterproof cap or seal for its cable tail, fit it as the manual shows, and position the joint so water drips away from it. Support the cable with clips so its weight does not hang on the connector. Leave a small drip loop below any entry point into the building.

Reusing cable that is already in the walls

Many homes already have network cable in the walls. It can often be reused for cameras:

• Check the jacket printing where the cable comes out of the wall plate. Cat5e or Cat6 is usually fine.
• Plain Cat5 (old installations) may carry one camera at a lower speed. Test it with the camera connected for at least a day before relying on it.
• Telephone cable is not network cable, even if it looks similar. It usually has fewer wires and will not work.

Never pull or cut cable near mains wiring without switching off power at the breaker first. If the route shares space with electrical cables, get a qualified electrician to check it.

What each symptom usually means

• Camera does not power up at all: check the switch port really supplies PoE, then test the cable for a broken or swapped wire. A bad crimp is the most common cause.
• Camera works by day, reboots or goes offline at night: the run cannot deliver enough power once infrared or lights switch on. Suspect CCA cable, a very long run or a weak connector, and check the switch's power budget.
• Camera shows as offline intermittently in the app: often a loose or corroded plug, especially outdoors. Re-terminate the end and check the waterproof seal.
• Camera works on a short patch lead but not on the long run: the run itself is the problem. Test it end to end, and if it passes the tester but still fails, try a shorter run or a better cable to rule out CCA.
• Picture freezes or stutters but the camera stays online: more likely your home network or internet upload than the cable. Try viewing the camera on the same network first.

When to get help

Get a qualified electrician or experienced installer if the run needs to share a route with mains cables, cross a roof, go underground, or enter a building where fire-rated cable may be required. Do not work on a ladder or roof alone, and switch off power at the breaker before working near any wiring. If a camera still fails after a good cable test and a short-lead test, contact the seller with the camera model and a description of the symptoms.

Install or resell cameras?

For customer jobs, standardise on one solid copper Cat5e or Cat6 drum from a source you trust, and keep a scrap of it so you can show customers what they are paying for compared with cheap CCA cable. Print or write a run label at both ends, test every run with a tester and with the camera itself before mounting, and note each camera's location against its port so a later fault call is a quick check, not a search. Quote outdoor sections with UV-rated or burial-rated cable from the start rather than replacing cracked indoor cable later. If you install or sell security cameras and want to discuss supply and dealer terms, see the Yoosee partner information.

Frequently asked questions

Is Cat6 better than Cat5e for 4K security cameras?

Not in any way you would notice. A higher-resolution camera sends a larger stream, but it is still well within what Cat5e handles for gigabit Ethernet. Spend the money on solid copper cable and good connectors instead.

Can I mix Cat5e and Cat6 in the same camera system?

Yes. Each camera has its own run, so one camera on Cat5e and another on Cat6 works fine. Within a single run, joining the two types also works, but every joint is another point of failure, so a single unbroken length is better.

Does Cat6 cable carry more PoE power than Cat5e?

The camera draws what it needs from the switch, whichever category you use. Thicker solid copper cores lose slightly less power along the way on long runs, which is one small advantage of good Cat6, but the difference between solid copper and CCA is much bigger than the difference between categories.

Can I use a network cable joiner to extend a run that is too short?

A good inline coupler usually works for data, though it adds a weak point, especially outdoors where moisture gets in. Keep the total length within the usual Ethernet limit, put the joint somewhere dry, and test the camera with infrared on before mounting.

Do I need special cable for a camera on a pole or a separate building?

Use outdoor-rated or burial-rated cable, ideally inside conduit, and consider shielded cable if the run is long or passes near electrical equipment. Runs between separate buildings can pick up electrical surges, so ask a qualified electrician about earthing and surge protection for your site.