Security Camera Cabling Guide

Security Camera Cabling Guide: The Cable Choices That Make or Break Your Installation

A security camera that randomly reboots at 3am isn't a camera problem. It's a cable problem. A 4K feed that drops to 480p halfway through the day isn't a network issue. It's voltage drop over a cheap Cat6 cable that can't handle the power demand.

Security cameras fail because of cable choices, not camera quality. With the Australian home security market growing from $2.2 billion to a projected $5.3 billion by 2034, and NSW home invasions hitting a four-year high, installers and property owners need systems that work when they matter most.

This guide covers what cables work for which cameras, why PoE has real-world distance limits shorter than the spec sheet, and the installation mistakes that cause callbacks six months later.

Analogue vs IP Cameras: Completely Different Cables

The first decision isn't which cable to buy. It's knowing which type of camera you have, because analogue and IP cameras use entirely different cabling systems.

Analogue Cameras (CCTV, DVR Systems)

Analogue cameras send unprocessed video signals over RG59 or RG6 coaxial cable to a Digital Video Recorder (DVR). These cameras need two separate cable runs:

  • Coaxial cable (RG59 or RG6) for video signal transmission using BNC connectors
  • Separate power cable (typically 4-core or 6-core security cable) from a power supply to each camera

Advantage: Coaxial handles longer distances without signal degradation. RG59 reliably transmits video up to 200-300 metres.

Disadvantage: Two cable runs mean more labour, more materials, and more complicated troubleshooting.

Shop: RG59 and RG6 Coaxial Cable | 4-Core and 6-Core Security Cable | BNC Connectors

IP Cameras (Network Cameras, NVR Systems)

IP cameras transmit digital video over a network using Cat5e, Cat6, or Cat6a Ethernet cable. They connect to a Network Video Recorder (NVR) or directly to your network.

The breakthrough technology is Power over Ethernet (PoE). A single Ethernet cable delivers both data and power, eliminating the need for separate power runs.

Advantage: One cable does everything. Simpler installation, cleaner cable management, easier future upgrades.

Disadvantage: Distance and power are limited by voltage drop. More on this below.

Shop: Cat6 Cable | Cat6a Cable | RJ45 Connectors

Using Cat6 Cable with Analogue Cameras

You can run analogue cameras over Cat6 cable using a device called a CCTV balun. The balun converts the BNC connector to work with twisted-pair Ethernet cable.

Why do this? Future-proofing. If you install Cat6 now for analogue cameras, you can upgrade to IP cameras later without re-cabling.

Shop: CCTV Baluns

The PoE Problem: Why 100 Metres Is a Lie

The IEEE 802.3af standard says PoE works up to 100 metres. That's true, on paper. In the real world, voltage drop reduces the usable distance, especially for high-power cameras.

How Voltage Drop Kills Camera Performance

PoE delivers 48 volts at the switch. By the time power travels 100 metres through Cat6 cable, voltage can drop to 37-40V due to cable resistance. A PTZ camera drawing 15W might receive only 12W at the camera end.

What happens:

  • Camera randomly reboots when the PTZ motor engages (power spike exceeds available power)
  • Night vision IR LEDs don't activate properly
  • Camera works fine on a short test cable but fails at installation distance
  • Video feed is unstable or drops frames during high activity

Real-World PoE Distance Limits by Camera Type

Camera Type Power Draw Reliable Distance (Cat6)
Basic 1080p dome camera 5-8W 90-100 metres
4K fixed camera with IR 10-12W 70-80 metres
PTZ camera (pan/tilt/zoom) 15-25W 50-60 metres

Solutions for Longer PoE Runs

1. Use Cat6a cable instead of Cat6
Cat6a uses thicker 23 AWG conductors with lower resistance. This reduces voltage drop and extends reliable PoE distances by 15-20%.

2. Install PoE extenders
A PoE extender placed at the 90-metre mark repeats both power and data, effectively doubling your range to 180 metres. For runs beyond that, use two extenders in series.

3. Use PoE+ or PoE++ switches
Higher-capacity switches (802.3at or 802.3bt) deliver more power, compensating for voltage drop over long runs.

4. Place cameras closer to the NVR or switch
Sometimes the simplest solution is relocating the recorder closer to camera clusters.

Shop: Cat6a Cable

Pure Copper vs CCA: The Cable Quality That Destroys Installations

Not all Cat6 cable is created equal. The conductor material determines whether your PoE camera works reliably or fails unpredictably.

Pure Copper (What You Should Always Use)

Solid bare copper conductors have low resistance, minimal voltage drop, and reliable power delivery over distance. Pure copper cable maintains stable PoE performance across the full 100-metre run.

CCA - Copper Clad Aluminium (What to Avoid)

CCA cable has an aluminium core with a thin copper coating. It's cheaper to manufacture, so it's sold at lower prices. The problem? Aluminium has 60% higher resistance than copper.

What happens with CCA cable:

  • Voltage drop is significantly worse. A CCA cable carrying 60W PoE++ can lose 2 volts over just 30 metres.
  • PTZ cameras shut down when motors engage because available power drops below minimum requirements.
  • Cable overheats under sustained PoE load, degrading the jacket and creating fire risk.
  • Connections oxidise at termination points, causing intermittent failures months after installation.

The callback scenario: Camera works perfectly on installation day. Three months later, it randomly reboots during peak activity when the IR LEDs activate and the PTZ motor moves. You replace the camera. Problem persists. You finally test with a short pure copper patch cable. Camera works flawlessly. The cable was the problem all along.

Always specify pure copper cable for PoE camera installations. The upfront cost difference is minor. The long-term reliability difference is massive.

Shop: All Access Communications Datamaster Cat6 and Cat6a cable uses 100% pure copper conductors. Shop Cat6 Cable

Cable Selection Chart: Which Cable for Your Camera?

Camera Type Resolution Distance Recommended Cable
Analogue CCTV Any Up to 300m RG59 Coaxial + 4-core power cable
IP camera 1080p Under 90m Cat5e (pure copper)
IP camera 4K Under 80m Cat6 (pure copper)
IP camera (PTZ or high-power) Any Under 100m Cat6a (pure copper)
Any IP camera Any Over 100m Cat6 + PoE extenders, or fibre optic

Note: For voltage drop calculations on long power cable runs, use our Low Voltage Power Drop Calculator.

Installation Best Practices

Outdoor Installations

Protect cables from the elements:

  • Run cables through conduit (PVC or metal) to protect from UV exposure, moisture, and physical damage
  • Use outdoor-rated Cat6 with UV-resistant jacket if conduit isn't practical
  • Install weatherproof junction boxes for all connections and splices
  • Use drip loops at camera entry points to prevent water running down cables into connections
  • Seal conduit entry points with silicone to prevent moisture ingress

Protect from animals: Rodents chew through cables. Metal conduit or heavy-duty PVC prevents this. If burying cables underground, use direct-burial rated cable inside conduit at minimum 300mm depth.

Indoor Installations

Run cables concealed and inaccessible:

  • Inside walls, not surface-mounted where tampering is easy
  • Through ceilings and roof spaces, secured with cable ties or clips every 1-1.5 metres
  • Avoid running cables alongside high-voltage power lines (maintain 300mm separation minimum) to prevent electromagnetic interference

Cable routing rules:

  • Support cables properly. Don't drape them loosely or leave them resting on ceiling tiles.
  • Maintain proper bend radius. Don't kink or sharply fold Cat6 cable (minimum 4x cable diameter bend radius).
  • Label every cable at both ends. Use a label maker or write on the jacket with permanent marker.
  • Leave service loops (extra 1-2 metres of cable coiled neatly) at camera and recorder ends for future adjustments.

Testing Before Final Installation

The professional installer's secret: test with a short cable first.

If a camera works perfectly on a 1-metre patch cable but fails on the 70-metre installation run, you've immediately identified voltage drop or cable quality as the problem. This 30-second test saves hours of troubleshooting later.

After installation, test motion detection, night vision activation, PTZ movement (if applicable), and sustained recording to verify the camera receives adequate power under all operating conditions.

Common Installation Mistakes

1. Using CCA Cable for PoE Cameras

The cheapest cable costs the most in callbacks. Always specify pure copper.

2. Not Accounting for Voltage Drop on Long Runs

A 4K PTZ camera 90 metres from the switch won't work reliably on standard Cat6. Use Cat6a or install a PoE extender.

3. Running Cables Outside Walls

Surface-mounted cables are easily accessed, tampered with, or cut. Run cables concealed inside walls and ceilings.

4. Mixing Analogue and IP Without Baluns

You cannot plug a BNC connector directly into Cat6 cable. Use a CCTV balun for conversion.

5. Exposing Connectors to Direct Sunlight

UV exposure degrades plastic connectors and cable jackets. Use weatherproof enclosures for all outdoor connections.

6. Not Labelling Cables

Future you will curse past you when troubleshooting 20 unlabelled cables in a rack. Label everything.

7. Installing Cameras Too Far From Power or Network Points

Planning camera locations without considering cable routes leads to unnecessarily long runs, voltage drop problems, and wasted cable. Plan the full system layout before drilling holes.

Your Reliable Security System Starts with the Right Cable

Security cameras are only as reliable as the infrastructure supporting them. The right cable choice, properly installed, delivers years of dependable surveillance. The wrong choice creates intermittent failures, callbacks, and cameras that don't work when you need them most.

Access Communications stocks the full range of security camera cabling:

All our network cable uses pure copper conductors and is backed by our limited lifetime warranty.

Need help selecting cable for a specific installation? Contact our team or call 02 9838 4946. We've been supplying Australian installers since 1973.