Remote SupportA cabinet built to standard outlives three rounds of gear
A properly built network cabinet outlives three rounds of equipment. A poorly built one causes outages, safety issues and expensive rework. This guide covers what good looks like for Australian offices, warehouses and small equipment rooms without a full data centre.
The standards are not optional. AS/NZS 3080 governs cabling, AS/NZS 3000 governs electrical work, and fixed telecommunications cabling must be installed by an ACMA-registered cabler. Fines and insurance issues follow unlicensed work.
The global structured cabling market sits near 13 to 16 billion USD in 2026, with Cat6A now the default for new commercial installs at 10 Gbps to a full 100 metres. A standard 48-port PoE++ switch generates over 600 watts of heat, and modern switches run 16 to 20 inches deep, so shallow wall-mount cabinets built for older gear no longer fit. Plan for 30 per cent extra U-space and at least 6 inches of extra depth from day one.
The standards that apply
These are the Australian standards and regulatory requirements a cabinet build must meet. Your installer should be able to name each one and show compliance.
AS/NZS 3080
Information technology cabling. Generic cabling for customer premises. Defines cable categories, performance classes and installation practice.
AS/NZS 3000
Wiring rules. Governs electrical installations including the dedicated circuit, RCD or RCBO protection and earthing for the cabinet.
AS/NZS 3084
Telecommunications installations. Pathways and spaces. Covers clearances, cable routing and where a cabinet may sit in a building.
ACMA cabler registration
Fixed telecommunications cabling must be installed by an ACMA-registered cabler. Unlicensed cabling is illegal and voids insurance.
AS 1670.1
Fire detection where a cabinet sits in an unmonitored room. Required where local building codes demand it.
Size the cabinet for the gear plus headroom
Size the cabinet for the equipment you have now plus at least 30 per cent headroom. A full cabinet forces a rebuild every time you add a switch or server. The table matches cabinet size to network point count, the most reliable proxy for a small business.
| Office size | Network points | Cabinet | Typical contents |
|---|---|---|---|
| Small office | Up to 24 | 12U or 15U wall-mount | Switch, patch panel, UPS, small router |
| Medium office | 24 to 96 | 22U or 27U floor-standing | Multiple switches, patch panels, UPS, router |
| Large office | 96 and above | 42U floor-standing, or multiple | Full server and network infrastructure |
Cabinet size by network point count, with typical contents
- Office size
- Small office
- Network points
- Up to 24
- Cabinet
- 12U or 15U wall-mount
- Typical contents
- Switch, patch panel, UPS, small router
- Office size
- Medium office
- Network points
- 24 to 96
- Cabinet
- 22U or 27U floor-standing
- Typical contents
- Multiple switches, patch panels, UPS, router
- Office size
- Large office
- Network points
- 96 and above
- Cabinet
- 42U floor-standing, or multiple
- Typical contents
- Full server and network infrastructure
Physical specifications that matter
Beyond size, a cabinet needs the physical features that make it safe, serviceable and cool. Missing any of these shows up later as an outage or a rebuild.
Lockable doors
Lockable front and rear doors. Authorised access only. The cabinet is the physical security boundary for your network.
Perforated doors
Perforated front and rear doors for airflow. Front intake, rear exhaust. Solid doors trap heat and shorten equipment life.
19-inch mounting rails
Standard 19-inch mounting rails at EIA-310 spacing. Every switch, patch panel and server hangs off these.
Earth bond stud
An earth bond stud, visible and connected to building earth. Poor earthing causes safety hazards and electromagnetic interference.
Leave at least 600 mm clearance front and rear for access, per AS/NZS 3084. Floor-standing cabinets sit on adjustable levelling feet. Cable entry points top and bottom use brushed glands to keep airflow sealed.
Power: dedicated circuit, UPS and protection
Every cabinet needs clean, protected power. A dedicated circuit, a UPS sized for graceful shutdown and RCD or RCBO protection per AS/NZS 3000.
Dedicated circuit
A dedicated circuit for the cabinet, sized for peak load. Do not share it with general office power.
UPS for graceful shutdown
Size the UPS for at least 10 to 15 minutes at full load. Enough to shut down servers cleanly and ride out short blips.
Rack-mount PDU
Use a rack-mount PDU for distribution, monitored where the load is critical. Do not daisy-chain power boards.
RCD or RCBO protection
RCD or RCBO protection per AS/NZS 3000. Emergency power-off clearly labelled where required.
For critical cabinets, ask for A and B feeds from separate circuits. UPS signalling should integrate to controlled shutdown of servers so a long outage does not corrupt storage.
Cooling and airflow
IT equipment generates heat. Without cooling, equipment fails prematurely. ASHRAE recommends an intake temperature of 18 to 27 degrees for IT equipment. The cooling approach scales with the cabinet.
Passive cooling for small cabinets
Small cabinets may run on passive cooling through perforated doors and vents. Add fans if ambient exceeds 25 degrees.
Blanking panels
Fit blanking panels in unused U-spaces to control airflow. They stop hot exhaust air recycling to the cold intake.
Temperature monitoring
Monitor temperature and humidity with alerting. A failed air conditioner in an unmonitored room cooks equipment over a weekend.
Dedicated room cooling
Large cabinets need dedicated room air-conditioning. Do not place cabinets in return air paths or direct sunlight.
In larger installs, separate hot and cold aisles. Heat load should be calculated and cooling sized to match, not guessed.
Structured cabling
Structured cabling is the part most often done badly. The standard is Cat6A copper for new installs, OM4 fibre for in-building backbones, every cable labelled at both ends, and every link tested on install with results retained.
Cat6A matters for thermal reasons, not just bandwidth. Its thicker insulation dissipates heat from PoE++ loads up to 90 watts per port and prevents alien crosstalk, which Cat6 cannot handle at sustained power. Use Velcro hooks, not zip ties, on Cat6A: zip ties crush the internal twist and degrade signal quality, violating TIA-568 standards.
Cat6A copper and OM4 fibre
Cat6A for new copper installs at 10 Gbps to 100 metres. OM4 fibre for in-building backbones. Do not install Cat5e or legacy copper in a new build.
Patch panels up top, switches below
Patch panels at the top of the cabinet, switches below. Horizontal managers between patch panels and switches, vertical managers on both sides.
Every cable labelled both ends
Every cable labelled at both ends with the same identifier. Consistent colour coding for voice, data, management and IoT.
Test every link
Test every link on install with a Fluke or equivalent tester and retain the results. Documented as-built diagrams stored with the client.
Respect bend radius and pull tension per manufacturer specs. Patch cables cut to length, not 2 metre cables bundled up. Use Velcro not zip ties on Cat6A, and follow TSB-184-A for loose bundling on PoE++ runs to prevent overheating. Separate power and data cable runs to avoid interference.
Safety and labelling
A cabinet that is clean, labelled and documented is safe and serviceable. One that is a rats nest is an outage waiting to happen and a hazard for anyone who opens the door.
Fire detection where required
Fire detection and suppression where legally required. Clean, organised cabling, not a rats nest.
Label everything
Labelling on every device, every cable and every circuit. Cabinet warning labels for electrical, high current and authorised access only.
Site documentation
A site documentation folder inside or near the cabinet. Photograph the layout and store it with asset management.
Room access control
Key or access control for the room the cabinet sits in. The cabinet lock is the second layer, not the only one.
No tripping hazards or unsupported cable runs. When the tech who built it leaves, the documentation is what lets the next person keep the lights on.
How we build a cabinet to standard
We scope a cabinet build as a project, not a break-fix call. The timeline depends on the site, the point count and whether the room is ready.
- Step 1
Survey the site
We measure the room, the point count and the power available. You receive a cabinet size, a cabling plan and a power and cooling spec.
- Step 2
Agree the standard
We agree the standards, the cabinet model and the cabling category. You approve the scope and the price before any gear is ordered.
- Step 3
Build and label
An ACMA-registered cabler installs the cabinet, terminates and labels every cable, and tests every link with a Fluke. You receive the as-built diagrams.
- Step 4
Review a month in
We review temperature, airflow and load a month after install and schedule a yearly check. You confirm the build still matches the site.
What we will not do
We will not build a cabinet with no headroom, no UPS or no cooling and call it done. A build that fails in the second year is not a saving.
We will not run fixed telecommunications cabling without an ACMA-registered cabler. Unlicensed cabling is illegal, voids insurance and fails an audit. The standard is the standard.
Common questions
Do I need an ACMA-registered cabler for a network cabinet?
Yes, for any fixed telecommunications cabling. ACMA requires Open CABLER registration for fixed cabling that connects to a carrier network. Unlicensed cabling is illegal, voids insurance and fails an audit. Patch leads and pre-made cables do not need registration, but terminating fixed cabling does.
What size network cabinet do I need?
Size by network points. Up to 24 points, a 12U or 15U wall-mount cabinet is enough. For 24 to 96 points, a 22U or 27U floor-standing cabinet. For 96 points and above, a 42U cabinet or multiple. Always allow at least 30 per cent headroom for growth so a new switch does not force a rebuild.
How long should the UPS run a cabinet for?
At least 10 to 15 minutes at full load. That is enough to ride out short power blips and to shut down servers and storage cleanly in a longer outage. The UPS should signal servers to shut down automatically so a long outage does not corrupt data.
What temperature should a network cabinet be kept at?
ASHRAE recommends an intake temperature of 18 to 27 degrees for IT equipment, with relative humidity between 20 and 80 per cent. Above 27 degrees, equipment life shortens and intermittent faults appear. Monitor temperature and humidity with alerting, especially in unmonitored rooms.
What cabling standard should a new cabinet use?
Cat6A copper for new installs and OM4 fibre for in-building backbones, per AS/NZS 3080. Do not install Cat5e or legacy copper in a new build. Every cable should be labelled at both ends and every link tested on install with a Fluke or equivalent tester, with results retained.
Can I put a network cabinet in any room?
No. The room needs at least 600 mm clearance front and rear for access, dedicated power per AS/NZS 3000, cooling that keeps intake under 27 degrees, and fire detection where local codes require it. Do not place a cabinet in a return air path, in direct sunlight or in a room with no access control.
Build the cabinet once, to standard
Our Brisbane team designs, supplies and installs network cabinets to AS/NZS standards across Australia, including structured cabling, PDUs, UPS and environmental monitoring. Tell us your site and point count and we will scope the build.