CCTV Cabling: Planning IP Camera Infrastructure

Older CCTV systems typically ran on coaxial cable carrying an analogue video signal back to a dedicated recorder, with separate cabling often needed for power. IP cameras instead connect over standard structured cabling, usually Cat6, sending digital video and receiving power over the same cable via PoE. This is now the default choice for new installations because it simplifies cabling and allows far higher resolution footage.

Existing coax infrastructure is not necessarily wasted. HD over coax solutions exist that push higher resolution signals over legacy cabling, which can be a sensible interim step where a full recable is not immediately affordable. However, for any new build or major upgrade, IP over structured cabling is the more future-proof option and aligns with how the rest of a business network is typically built.

The practical implication is that CCTV cabling should be planned using the same standards and the same contractors as general data cabling, rather than treated as a separate, standalone trade.

Cat6 cabling is the common baseline for IP camera installations, offering sufficient bandwidth for high resolution streams and support for the PoE standards used to power cameras. PoE (802.3af), PoE+ (802.3at) and the newer PoE++ (802.3bt) standards define increasing power budgets, which matters because not every camera has the same appetite.

A basic fixed IP camera typically draws well within standard PoE limits, but pan-tilt-zoom cameras, cameras with built-in heaters for outdoor winter use, or multi-sensor units can draw considerably more, sometimes requiring PoE+ or PoE++ ports. Specifying the wrong PoE class at the switch can leave a camera underpowered and unreliable, particularly in cold conditions where heaters draw extra current.

It is not enough to confirm each individual camera's power draw; the switch itself has a total PoE power budget shared across all its ports. Adding up the draw of every connected camera, with some headroom for future additions, against the switch's total PoE budget avoids a common failure mode where cameras intermittently drop out or fail to power on once several are connected.

Larger installations often use dedicated PoE switches sized specifically for the camera load, kept separate from switches serving general office equipment. This also makes it easier to put camera traffic on its own network segment, discussed further below, and simplifies future capacity planning as more cameras are added.

Standard Ethernet cabling is limited to 100 metres between switch and device, factoring in patch leads at each end. Larger sites, long driveways, warehouses or multi-building properties frequently need camera runs beyond that distance, and simply using a longer copper cable does not work reliably; signal and power both degrade past the standard's design limits.

The usual solutions are fibre optic backbone cabling with a media converter at the camera end, PoE extenders that regenerate signal and power partway along a run, or wireless bridges for cameras where trenching or cable pathways are impractical. Fibre is generally the most robust option for permanent long-distance camera links and avoids the additional point of failure that an extender introduces.

Cameras mounted outdoors, or cabling routed through roof spaces, external walls or underground, need materials rated for the environment they pass through. This includes UV-stable conduit for exposed external runs, appropriately rated outdoor cable where conduit is not practical, and weatherproof connectors or junction enclosures at any external termination point.

IP-rated camera housings are only as good as the cabling and connection points feeding them; a well-rated camera with a poorly sealed cable entry point will still let moisture in over time. Underground runs between buildings should follow proper trenching practices with conduit and appropriate depth, consistent with general telecommunications infrastructure standards.

Camera positions should be decided in consultation between the client's security requirements and the practical realities of cable pathways. A position that gives ideal coverage but requires an extremely long or difficult cable run may not be worth the added cost and risk compared with a slightly adjusted position that is far easier to cable.

Planning pathways early, ideally before ceilings are closed up in a new fit-out or renovation, avoids expensive surface-mounted conduit later. Where possible, camera cabling should follow the same containment systems as general data cabling, keeping runs tidy and consistent with the rest of the building's infrastructure.

The network video recorder, or NVR, is typically located in the same distribution room as core network equipment, benefiting from the same power, cooling and physical security already in place there. This also keeps the backbone cabling short between the NVR and the switches aggregating camera traffic.

Storage capacity should be planned against camera count, resolution, frame rate and required retention period, since these factors multiply quickly. A system with more cameras or higher resolution than originally planned can exhaust its storage far sooner than expected, so it is worth building in some headroom rather than sizing storage to the exact current camera count.

Placing cameras on their own VLAN, separate from general office and guest network traffic, is good practice for both performance and security. It prevents camera traffic from competing with business-critical applications for bandwidth, and it limits what an attacker could reach if a camera were compromised, since cameras are common targets for exploitation given how rarely their firmware gets updated.

This segmentation should be planned into the network design from the outset rather than retrofitted, since it affects switch configuration, VLAN tagging and firewall rules between segments. A competent networking contractor can implement this alongside the physical cabling work.

Surveillance and privacy obligations vary between Australian states and territories, and can also depend on where cameras are pointed, such as neighbouring properties or public areas. Businesses should check their specific obligations, including any signage requirements, with the relevant state authority or legal advice rather than relying on general assumptions, since this guide cannot substitute for jurisdiction-specific advice.

Once cabling and cameras are installed, commissioning should confirm every camera streams reliably, PoE power is stable under full load, storage is recording as configured, and footage can be retrieved when needed. A short soak test period before sign-off catches intermittent issues, such as marginal PoE power or Wi-Fi interference on wireless-bridged cameras, that a one-off check might miss.