Security Camera Cabling Guide

Why Your Security Cameras Keep Failing (And How Cable Choice Fixes It)

Choosing the right cable for your security camera installation is critical for reliable performance and compliance with Australian standards. This guide covers everything you need to know about security camera cabling, from cable types and PoE power requirements to avoiding common installation mistakes.

Analogue vs IP Cameras: Different Cables Entirely

The first decision in any security camera installation is whether you're using analogue or IP cameras, because this determines your entire cabling approach. These two camera types require completely different cable types and cannot be interchanged.

The PoE Distance Problem: Why 100 Metres is a Lie

Power over Ethernet (PoE) is one of the biggest advantages of IP cameras. A single network cable delivers both data and power, eliminating the need for separate power runs. But there's a critical limitation that catches installers out: voltage drop over distance.

Why Voltage Drop Happens

Every metre of cable has electrical resistance. When you push power through that cable, some voltage is lost as heat. The longer the cable and the higher the power draw, the greater the voltage drop.

Typical voltage drop on Cat6 cable carrying 60W PoE++:

• 30 metres: ~4V drop (camera receives 44V, works fine)
• 60 metres: ~8V drop (camera receives 40V, works fine)
• 90 metres: ~12V drop (camera receives 36V, insufficient for high-power functions)
• 100 metres: ~13V drop (camera fails to boot or reboots under load)

Solutions for Long Cable Runs

If you need to run cameras beyond 60 metres with PoE, you have three options:

1. Use Cat6a cable instead of Cat6 - Cat6a has thicker conductors (23 AWG vs 24 AWG) and lower resistance, allowing slightly longer runs
2. Install a PoE extender at 90 metres - This repeats the PoE signal and adds another 100 metres of distance
3. Run a separate power cable - Use network cable for data only and run 240V AC or 12V DC power separately to the camera location

Pure Copper vs CCA Cable: Why Cheap Cable Will Cost You

Copper Clad Aluminium (CCA) cable is flooding the Australian market. It's cheaper than pure copper cable, but it's also illegal for customer cabling installations and creates serious safety and performance problems.

Why CCA Fails for PoE Security Cameras

CCA cable has an aluminium core with a thin copper coating. Aluminium has 60% higher electrical resistance than pure copper. This means:

• Voltage drop is nearly double - A 50-metre CCA run delivers the same voltage as a 90-metre pure copper run
• Cable overheats under load - High-power PoE cameras can cause CCA cable to get dangerously hot, creating a fire risk
• Performance degrades over time - Aluminium oxidises rapidly, increasing resistance further and causing intermittent connection failures

How to identify CCA cable: If the cable price seems too good to be true, it probably is. Genuine pure copper Cat6 cable costs more, but it's the only compliant and safe option. Always buy from reputable Australian suppliers who can verify compliance.

Read the full story: Why CCA cable is illegal in Australia and how to avoid it

Cable Selection Chart: Which Cable for Which Camera?

Use this flowchart to choose the right cable for your security camera installation:

Quick Reference: Camera Power and Cable Requirements

Camera Type	Typical Power Draw	Recommended Cable	Max Distance (PoE)
Fixed dome (1080p)	5-7W	Cat6	100m
Fixed bullet (4K)	12-15W	Cat6	90m
PTZ (motorised, 4K)	30-60W	Cat6a	60m
IR bullet (night vision, 4K)	20-25W	Cat6	70m

Installation Best Practices

Outdoor Installations

Outdoor security camera cabling requires protection from weather, UV exposure, and physical damage. Follow these best practices:

• Use UV-rated outdoor cable - Standard indoor Cat6 cable degrades under UV exposure. Specify UV-rated PE (polyethylene) jacket cable for outdoor runs.
• Run cable through conduit - Use 20mm conduit for single cable runs, 25mm for multiple cables. This protects against physical damage, moisture, and rodents.
• Create drip loops at entry points - Cable should loop down before entering the camera housing or wall penetration. This prevents water running along the cable into the camera.
• Seal all penetrations - Use silicone sealant or weatherproof glands where cables enter buildings or camera housings.
• Avoid cable strain - Use cable clips every 30cm to support the cable weight and prevent tension at connectors.

Indoor Installations

Indoor installations are simpler but still require attention to detail:

• Label every cable at both ends - Use permanent markers or label makers. Include camera number and location (e.g., "CAM-03 WAREHOUSE EAST").
• Leave service loops - Coil 1-2 metres of extra cable at the camera end and at the NVR end. This allows cameras to be repositioned or equipment to be serviced without re-running cable.
• Avoid running near power cables - Keep network cables at least 30cm away from mains power cables to avoid electromagnetic interference.
• Use cable management - Secure cables with Velcro straps (not zip ties, which can damage the cable) and use cable trays or J-hooks in ceiling spaces.

Common Mistakes to Avoid

1. Buying CCA Cable to Save Money

CCA cable is 20-30% cheaper than pure copper, but it's illegal in Australia and will cause performance problems. Always specify pure copper cable. Access Communications only stocks 100% compliant pure copper cable.

Read more: Why CCA cable is banned in Australia

2. Assuming 100 Metres is Always Safe for PoE

The 100-metre Ethernet distance limit applies to data only. When you add PoE power delivery, voltage drop becomes the limiting factor. For high-power cameras (PTZ, high-wattage IR), keep cable runs under 60 metres on Cat6 or use Cat6a for runs up to 80 metres.

3. Not Testing Cable Runs Before Termination

Test your camera with a short patch cable before committing to a long cable run. If the camera works on 1 metre but fails on 70 metres, you know the issue is cable length or voltage drop, not camera configuration.

4. Using Indoor Cable for Outdoor Runs

Standard PVC-jacketed Cat6 cable breaks down under UV exposure within 6-12 months. Always use UV-rated PE jacket cable for outdoor installations, even if the cable is inside conduit (conduit fittings can allow UV penetration).

5. Over-Tightening Cable Ties or Zip Ties

Network cable is delicate. Over-tightening cable ties can crush the internal conductors and cause intermittent failures. Use Velcro cable straps or finger-tight zip ties only.

6. Forgetting to Leave Service Loops

Cameras need to be adjusted or replaced eventually. If you terminate cables with zero slack, you'll need to re-run the entire cable to make changes. Always leave 1-2 metres of coiled cable at each end.

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When to Use Fibre Optic Cable for Security Cameras

For most security camera installations, Cat6 or Cat6a is the right cable. But there are specific scenarios where fibre optic is the correct choice, and trying to solve them with copper will always create problems.

When Fibre is the Right Answer

• Runs over 100 metres: The 100-metre Ethernet limit is absolute. No amount of cable quality, PoE extenders, or optimisation changes this for a continuous copper run. If your camera location is more than 100 metres from the NVR or switch, fibre is the clean solution. A single-mode fibre run can cover kilometres without signal degradation.
• Building-to-building runs: Running copper cable between separate buildings creates a serious lightning strike risk. Copper cable acts as a conductor between earthing systems that may be at different potentials, allowing surge current to travel between buildings and destroy connected equipment. Fibre is non-conductive and eliminates this risk entirely. It is the mandatory choice for inter-building runs in most commercial and industrial specifications.
• High electromagnetic interference environments: Factories, plant rooms, near high-voltage switchboards, or anywhere with significant electrical noise. Fibre carries light, not electrical current, and is completely immune to EMI.
• High-security installations: Fibre cannot be tapped without physically cutting the cable and a detectable signal loss occurring. For installations where signal interception is a concern, fibre provides a level of physical security that copper cannot match.

How It Works for IP Cameras

IP cameras themselves connect via RJ45. To use fibre for the backbone run, you need a media converter at each end: one at the switch or NVR end converts the electrical Ethernet signal to optical, and one at the camera end converts back to electrical for the camera. The camera connects to the media converter via a short copper patch cord. The media converter at the camera end typically also provides PoE output to power the camera, so you still only need one cable run to the camera location.

For larger installations, managed switches with SFP (Small Form-factor Pluggable) fibre ports eliminate the need for separate media converters at the switch end entirely.

Multimode vs Single-Mode Fibre

Type	Max Distance	Best For	Cost
Multimode (OM3/OM4)	Up to 300–550m at 10G	Building-to-building on the same site, long indoor runs	Lower transceiver cost
Single-mode (OS2)	Up to 10km and beyond	Long campus runs, remote building connections, perimeter cameras far from the main building	Higher transceiver cost, lower cable cost

For most security camera applications on a single site, multimode OM3 or OM4 fibre is the practical choice. For remote cameras covering large properties, car parks, or perimeter fencing more than a few hundred metres from the recorder location, single-mode is the right specification.

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