Best Ethernet Cable for PoE CCTV Cameras: UK Guide

A complete UK buying, installation and RJ45 wiring guide

Why the cable matters in a PoE CCTV system

A Power over Ethernet camera receives network data and DC power through the same four-pair Ethernet cable. That is what makes PoE CCTV tidy and scalable, but it also means the cable must perform two jobs reliably. A marginal cable may still show a network link while starving the camera of voltage, especially at night when infrared LEDs, white lights, heaters, microphones or motors increase the load.

Cable quality affects picture stability, start-up reliability, maximum distance, resistance to interference, future upgrade options and heat in cable bundles. The cheapest box of cable can therefore become the most expensive part of an installation if it causes intermittent cameras, re-terminations or a full re-cable.

The short answer: what should most buyers choose?

A practical starting point; always check the camera, PoE switch and local installation requirements.

Understanding Ethernet cable categories

Category	Typical capability	Advantages for CCTV	Disadvantages / cautions
Cat5e	1 Gb/s to 100 m	Adequate bandwidth for most IP cameras; thinner and inexpensive.	Less headroom for noise, high-power PoE and future upgrades.
Cat6	1 Gb/s to 100 m; 10 Gb/s over shorter links	Best all-round choice; commonly 23 AWG; improved crosstalk performance.	Slightly thicker and dearer than Cat5e; category performance depends on correct termination.
Cat6A	10 Gb/s to 100 m	Excellent noise margin and future-proofing; strong choice for four-pair/high-power PoE.	Larger bend radius, higher cost and more difficult termination.
Cat7 / Cat7A	High-performance shielded cabling	Useful only in a correctly designed end-to-end shielded system.	Often oversold online; not necessary for ordinary CCTV and may use non-standard connector ecosystems.
Cat8	25/40 Gb/s over short data-centre channels	Virtually no practical advantage for CCTV.	Expensive, bulky and unsuitable as a default building-camera cable.

Do not buy by category number alone A genuine standards-compliant Cat6 copper cable from a reputable maker is a better PoE choice than a suspiciously cheap “Cat7” or “Cat8” cable with unknown conductor material.

Pure copper vs CCA: the most important buying decision

Solid bare copper

Pure copper has lower DC resistance than aluminium-based conductors, so it wastes less power as heat and leaves more voltage available at the camera. It is the correct material for standards-based permanent horizontal cabling and the safest default for PoE.

Copper-clad aluminium (CCA)

CCA uses an aluminium core with a thin copper coating. It is lighter and cheaper, which makes it attractive in budget listings, but its higher resistance increases voltage drop and heating. Fluke Networks states that solid aluminium has about 55% greater resistance than copper of the same diameter and warns that CCA does not support PoE applications reliably because of increased DC resistance.

Factor	Solid bare copper	CCA
PoE voltage drop	Lower	Higher
Heat under load	Lower when correctly sized	Higher risk, especially in bundles
Mechanical durability	Better	More brittle and easier to damage
Standards confidence	Appropriate when certified and marked	Frequently non-compliant with structured-cabling requirements
Recommended for permanent PoE CCTV?	Yes	No

Conductor size: why 23 AWG is useful

AWG is an inverse scale: a lower number means a thicker conductor. Many Cat6 installation cables use 23 AWG, while many Cat5e cables use 24 AWG. More copper generally means lower resistance and better power delivery. For long routes, higher-power cameras or warm cable bundles, a reputable 23 AWG solid-copper Cat6 or Cat6A cable is a strong choice. Always verify the actual conductor diameter and DC resistance on the manufacturer’s data sheet.

Solid cable vs stranded cable

Construction	Best use	Advantages	Cautions
Solid conductor	Permanent runs in walls, lofts, trays and conduit	Lower resistance; stable punch-down termination; preferred for long PoE links.	Less flexible; use plugs or keystone jacks rated for solid conductors.
Stranded conductor	Short patch leads between NVR, switch and patch panel	Flexible and tolerant of repeated movement.	Higher resistance; not ideal for long permanent camera runs.

UTP, FTP and shielding explained

Marking	Construction	Where it helps	Trade-offs
U/UTP	No overall shield; unshielded pairs	Most domestic and light-commercial CCTV routes.	Lowest cost and easiest installation; more exposed to severe EMI.
F/UTP	Overall foil shield; unshielded pairs	Plant rooms, lifts, motors, fluorescent gear or other noisy environments.	Requires shielded hardware and correct bonding; stiffer and dearer.
U/FTP	Each pair foil-shielded; no overall shield	High-density, high-performance links.	More complex termination; unnecessary for many CCTV jobs.
S/FTP	Overall braid plus individually foiled pairs	Specialist high-noise or high-performance structured cabling.	Bulky, expensive and only effective as a properly bonded end-to-end system.

Shielding is not a magic upgrade. A shield that is not terminated and bonded according to the cabling design can provide little benefit and may create new problems. Keep data cables away from mains and high-current equipment where practical, follow applicable separation rules, and use a qualified installer when the route enters an electrically demanding or regulated environment.

Choosing the correct jacket for the route

Match the cable jacket and protection method to the environment, not just the Ethernet category.

PVC is common and economical, but building specifications may require low-smoke zero-halogen (LSZH) or a particular fire classification. In escape routes, public buildings and commercial installations, follow the project specification and applicable UK fire and construction-product requirements rather than choosing by price.

Outdoor UV-resistant PE

Sunlight and weather can crack an indoor jacket. Outdoor cable normally uses a black UV-resistant polyethylene jacket. Form a drip loop before the camera, use a suitable weatherproof gland or junction box and keep the RJ45 connection dry. The camera’s IP rating does not make an exposed connector waterproof.

Direct-burial and gel-filled cable

Direct-burial cable adds moisture protection, often through gel or a water-blocking compound and a robust PE jacket. It is messier to terminate but far more suitable for damp ground than ordinary outdoor cable. Conduit usually improves mechanical protection and serviceability, but it must be designed to avoid water traps and to meet local requirements.

Armoured and aerial routes

Where the cable is vulnerable to impact, rodents or ground works, use a specified armoured solution or protected conduit. For overhead spans, use cable and catenary support designed for aerial installation; do not hang a normal Ethernet cable under its own weight. Outdoor links between buildings also deserve surge and lightning-risk assessment.

Distance limits and voltage drop

Standard Ethernet channel design allows a maximum of 100 metres in total, commonly planned as up to 90 metres of permanent cable plus up to 10 metres of patch leads. Axis likewise recommends no more than 100 metres between the network source and camera. Connectors, cable temperature, conductor resistance and camera power consumption all reduce real-world margin.

Practical design rule Treat 90 metres as the sensible maximum permanent run, not a target. For high-power cameras, cold-start loads, hot lofts or marginal routes, choose thicker pure-copper cable, shorten the run or use a properly designed extender/fibre solution.

For links beyond 100 metres, do not simply hope that a better category will fix the problem. Use a compliant PoE extender, an intermediate switch with power, or fibre plus a local power source. Fibre is particularly useful between buildings because it provides long distance and electrical isolation, but ordinary fibre does not carry PoE.

PoE standards and cable power

PoE type	IEEE standard	Power at source (PSE)	Power available to device (approx.)	Pairs used
Type 1 PoE	802.3af	15.4 W	13 W	2 pairs
Type 2 PoE+	802.3at	30 W	25.5 W	2 pairs
Type 3 PoE++	802.3bt	60 W	51 W	4 pairs
Type 4 PoE++	802.3bt	90 W	71.3 W	4 pairs

Most fixed CCTV cameras fit within Type 1 or Type 2, while powerful PTZ cameras, heaters, illuminators and other accessories may require Type 3 or Type 4. Check the camera’s maximum consumption, the PoE class, the switch’s per-port limit and the switch’s total PoE budget. A 16-port switch that can provide 30 W on one port may not provide 30 W on all 16 ports simultaneously.

Recommended cable brands

A strong brand is useful because it usually provides traceable data sheets, standards declarations, conductor material, fire classification and repeatable quality. Availability changes, so confirm the exact product code rather than assuming every reel from a brand has the same construction.

Brand	Positioning	What to look for
Belden	Premium enterprise and industrial cabling	Cat6/Cat6A solid bare copper, PoE-rated designs and full technical documentation.
CommScope	Enterprise structured cabling	Category-matched cable, jacks and patching as a complete warranted system.
Excel Networking	Widely used in the UK	UK-available Cat6/Cat6A, LSZH, external and screened options with CPR information.
Prysmian / Draka	Major cable manufacturer	Documented data and fire-performance products through approved distributors.
Nexans	Professional structured cabling	Copper category cable with traceable technical data and system components.
Siemon / Panduit	Premium infrastructure systems	End-to-end category solutions for demanding commercial projects.
Kenable	UK value option	Select only listings that explicitly state full copper, correct AWG and the required outdoor/direct-burial jacket.

Brand warning Marketplace titles can be inaccurate. Reject vague descriptions such as “copper quality”, “CCA copper” or “Cat6 compatible”. Look for “solid bare copper”, conductor gauge, jacket material, category compliance and a downloadable data sheet.

A buyer’s checklist before ordering

1. Conductor: Solid bare copper for permanent PoE CCTV runs; avoid CCA.

2. Category: Cat6 for most new systems; Cat6A when power, noise, bundle size or future 10 Gb/s use justifies it.

3. Gauge: Prefer a reputable 23 AWG cable for long or power-demanding routes.

4. Jacket: Indoor LSZH/required fire class, outdoor UV-resistant PE, or direct-burial/gel-filled as appropriate.

5. Screening: U/UTP for normal routes; F/UTP or stronger only with an end-to-end bonding plan.

6. Components: Use Cat6-rated plugs, jacks, patch panels and patch leads suitable for the conductor type and diameter.

7. Length: Plan no more than 90 m permanent cable and 100 m total channel.

8. Documentation: Confirm manufacturer, product code, standards, DC resistance, fire rating and warranty.

How to fit an RJ45 connector correctly

Before you start For permanent structured cabling, a Cat6 keystone jack and short factory-made patch lead is often more repeatable than crimping a plug directly. If the camera requires a plug, use one rated for the cable’s category, outer diameter, conductor gauge and solid/stranded construction.

Tools required

Use a proper cable jacket stripper, flush cutters, a category-compatible RJ45 crimp tool, suitable 8P8C plugs (standard or pass-through), a cable tester and weatherproof glands or junction boxes for outdoor work. A PoE-aware tester is valuable because a basic continuity tester cannot confirm voltage under load or category performance.

Strip, arrange, trim and insert, then crimp and test.

Step 1- Cut and strip the cable

Make a clean square cut. Remove roughly 25–30 mm of outer jacket without nicking the insulated conductors. Keep the cable spline, rip cord, foil and drain wire only as required by the specific plug instructions.

Step 2 - Untwist and arrange the pairs

Separate only the length needed for termination. Excessive untwisting increases crosstalk and can make a Cat6 installation behave like a lower category. Use the T568B order shown below unless the project specifies T568A.

Step 3 - Straighten, trim and insert

Flatten the eight conductors in the correct order and trim them evenly. Push them fully into the plug so every conductor reaches the front and the outer jacket sits under the strain-relief tab. Check the colour order through the transparent plug before crimping.

Step 4 - Crimp once and test

Crimp firmly with the correct die. Test pin-to-pin continuity, opens, shorts, reversals, crossed pairs and split pairs. For professional work, certify the permanent link or at least use a qualified verifier that can check link speed and PoE delivery. Label both ends before leaving the site.

Gold contacts facing you, clip away: white/orange starts at pin 1 and brown ends at pin 8.

Pin	T568B colour	Pair	10/100 Mb/s data role	Gigabit role
1	White / Orange	Orange pair	Transmit +	Bidirectional data
2	Orange	Orange pair	Transmit −	Bidirectional data
3	White / Green	Green pair	Receive +	Bidirectional data
4	Blue	Blue pair	Not used for 10/100 data	Bidirectional data
5	White / Blue	Blue pair	Not used for 10/100 data	Bidirectional data
6	Green	Green pair	Receive −	Bidirectional data
7	White / Brown	Brown pair	Not used for 10/100 data	Bidirectional data
8	Brown	Brown pair	Not used for 10/100 data	Bidirectional data

 

Important: colours do not have one permanent “power job” In 10/100 Ethernet, orange and green carry data. In Gigabit Ethernet, all four pairs carry bidirectional data. Standards-based PoE can place power on the data pairs (Alternative A), the spare pairs used by 10/100 (Alternative B), or all four pairs for 802.3bt. The PSE and camera negotiate polarity and power; never invent a passive colour scheme.

 

Alternative A commonly uses pins 1–2 and 3–6 for power alongside data. Alternative B commonly uses pins 4–5 and 7–8. Four-pair PoE uses all four pairs. This is why every conductor and termination must be correct even when a camera appears to need only 100 Mb/s.

T568A vs T568B

T568A and T568B are both recognised wiring schemes; they swap the orange and green pairs. Performance is the same when the same scheme is used at both ends. T568B is common in UK commercial installations and is used in this guide. Do not mix A and B accidentally, and never choose a colour order by memory when the plug orientation is unclear.

Testing and commissioning

A basic wire-map tester confirms the eight conductors are connected in the expected order, but it does not prove that a cable meets Cat6 performance or can deliver sufficient PoE under load. For a critical or commercial system, record link length, wire map, resistance, PoE class, negotiated link speed and camera power at day and night.

After termination, inspect the live system for packet loss, camera reboots, image drop-outs when IR or white lights activate, and voltage-related warnings. A link that works on a bench with a two-metre lead may fail at 85 metres.

Common installation mistakes

Mistake	Why it causes problems	Better practice
Using CCA to save money	Higher resistance, voltage drop and heat.	Use certified solid bare-copper cable.
Indoor cable outside	UV and weather damage the jacket.	Use outdoor PE cable and weatherproof terminations.
RJ45 joint exposed to rain	Corrosion and intermittent PoE.	Use the camera gland or a suitable junction box with a drip loop.
Running tightly beside mains	Increased interference and regulatory concerns.	Plan separation and crossings according to applicable rules.
Over-tight cable ties or staples	Changes pair geometry and can crush conductors.	Use loose hook-and-loop ties and correct clips.
Sharp bends	Damages conductors and category performance.	Respect the manufacturer’s minimum bend radius.
Too much untwist at the plug	Increases near-end crosstalk.	Keep twists close to the contacts.
Mixing plug and conductor types	Poor contact or broken conductors.	Match the plug to solid/stranded cable, AWG and outer diameter.
Ignoring switch PoE budget	Cameras reboot when total load rises.	Calculate worst-case power for every port.

 

Practical recommendations by installation type

Single home camera or small domestic system

Use Cat6 U/UTP, 23 AWG solid bare copper. Choose an LSZH/approved indoor jacket inside and UV-resistant PE for external sections. Keep the run comfortably below 90 metres and terminate into a protected junction box.

Shop, office or warehouse

Use Cat6 as the minimum new-installation baseline. Consider Cat6A and screened cable where cable bundles are large, PoE power is high or electrical noise is significant. Use patch panels, labelled outlets and documented test results.

PTZ, heater or high-power camera

Confirm 802.3bt compatibility, maximum wattage and the start-up/night load. Prefer short runs, 23 AWG or larger standards-compliant copper cable, and a switch with both sufficient per-port output and total budget.

Camera on another building

Assess lightning, earth-potential and surge risks. Fibre between buildings is often the safest professional design; use a local PoE switch or media converter and power source at the remote building.

Frequently asked questions

Is Cat6 always required for a PoE camera?

No. Cat5e can support many cameras and standard PoE, but good Cat6 is a sensible default for new permanent work because it offers more crosstalk and power margin.

Can I use a 100-metre pre-made patch lead?

It may link, but a permanent installation should normally use solid installation cable with category-matched jacks, allowing for patch leads within the 100-metre channel limit.

Does shielded cable increase PoE distance?

Not automatically. Shielding controls interference; conductor resistance and standards compliance govern power loss. It must also be correctly bonded.

Can outdoor cable be used indoors?

Outdoor PE jackets may not have the required indoor fire performance. Transition to the specified indoor cable or use an approved route and product.

Can I join two Ethernet cables?

A category-rated coupler in a protected accessible location can work, but every joint adds loss and a possible failure point. A continuous run is preferred.

Are pass-through RJ45 plugs reliable?

Quality pass-through plugs can be fast and reliable when matched to the cable and used with a proper flush-cut crimper. Inspect for protruding conductors and test every termination.

Which colour carries positive PoE power?

There is no universal colour-based answer for standards PoE. Pair usage and polarity depend on PoE mode and negotiation. Follow T568A/B wiring and let compliant equipment manage power.

Final recommendation

For the majority of PoE CCTV installations, buy once and install properly: Cat6, 23 AWG, solid bare copper from a traceable manufacturer, with the correct jacket for the environment. Keep permanent runs below 90 metres, use category-matched connectors, protect every outdoor joint and test all eight conductors plus PoE delivery. Upgrade to Cat6A or screened cable for high-power, high-density or electrically noisy sites—not simply because a larger category number looks better in a listing.

HawkVision Pro can help match cameras, NVRs, PoE switches and cabling to the required distance and power budget. For project advice, visit hawkvisionpro.co.uk.

Safety and compliance note

Professional installation This guide is general technical information, not a substitute for a site survey. Follow the cable manufacturer’s data sheet, the camera and PoE switch manuals, applicable UK wiring/building/fire requirements and the project specification. Use a competent installer for commercial, buried, aerial, between-building or high-risk routes.

 

Sources and further reading

Fluke Networks — Power over Ethernet: https://www.flukenetworks.com/expertise/learn-about/four-pair-power-over-ethernet-poe-and-your-cabling-plant

Fluke Networks — Copper-clad aluminium cables: https://www.flukenetworks.com/content/application-note-copper-clad-aluminum-cables

Axis Communications — installation distance guidance: https://www.axis.com/files/acad/ar_top_10_installation_challenges_49690_en_1211_lo.pdf

Leviton — T568A and T568B wiring standards: https://leviton.com/content/dam/leviton/network-solutions/product_documents/brochure/Leviton-Basic-Residential-Installer-Guide.pdf

CommScope — Category 6A cabling: https://www.commscope.com/product-type/cables/twisted-pair-cables/category-6a-cables/

Belden — shielding types and use cases: https://www.belden.com/blog/stp-utp-ftp-cable-and-when-to-use-them

UK Government — Construction Products Regulation in Great Britain: https://www.gov.uk/guidance/construction-products-regulation-in-great-britain