9U 19-inch wall-mounted data cabinets
9U 19-inch Data Cabinets
Explore 9U 19-inch wall-mounted data cabinets for networking installations that need more rack space than a compact 4U or 6U cabinet. Check equipment heights and usable depth, and compare the available 9U models with neighbouring rack sizes before ordering.
Compare 9U data cabinets
Explore available depths and assembly options, and check current prices for 9U network cabinets.
-
9U 300mm Deep 19"
Choosing a 9U wall-mounted network cabinet
A 9U cabinet is a useful choice when a smaller rack would be cramped but you do not need a full 12U enclosure. Plan the equipment layout first, including any shelves and the clearance needed for cables.
Give each item the space it needs
Count the U needed by your patch panels, switches, accessories and any shelf-mounted devices. A shelf uses rack mounting space, but its platform position also matters when measuring the total height of equipment above it. Leave room to route and service the cables.
Check that your equipment will fit
Measure the actual depth of the switch or appliance and include plugs, connectors and cable bends. Also check that the cabinet has enough front clearance for projecting connectors and enough space around it to open the door.
Compare 9U with 12U
If your equipment already uses most of the available rack space, compare a 12U cabinet before ordering. The extra height may be useful for a later switch, PDU or patch panel, provided the wall and installation space can accommodate it.
Need help planning your installation? Try the Cabinet Finder or use the Cabinet Builder to select compatible accessories.
9U Data Cabinets: Your Questions Answered
Advice on arranging a 9U rack, allowing space for expansion and checking equipment clearance and wall mounting.
How do I work out how many U of cabinet space I need?
Add together the rack space required by everything you intend to mount: patch panels, switches, shelves, horizontal PDUs, cable managers and any other rack-mounted equipment.
Then consider equipment sitting on shelves. The shelf may occupy 1U at its mounting position, but the equipment resting on its platform may extend through that U and require additional clear space above it.
Finally, leave some room for growth if possible. A cabinet calculation that arrives at exactly 12U for a 12U cabinet is mathematically impeccable and operationally rather optimistic.
Should I leave spare U for future expansion, and how much?
Yes, where space and budget allow.
There’s no universal percentage because some installations are effectively finished on day one while others acquire new equipment regularly. Even one or two spare U can be valuable in a small installation; more is sensible if you already expect the network to grow.
Buying a cabinet in which the final available U is occupied during the initial installation is wonderfully efficient — right until somebody buys one more switch.
In extremis, you can then find yourself replacing an entire wall-mounted cabinet because a device 44.45mm high has appeared.
A little unused rack space is usually much cheaper than replacing the enclosure later.
Where should I position the patch panel and network switch?
A very common arrangement is to put the patch panel immediately above or below the switch.
That keeps patch leads short, makes ports easier to trace and avoids sending twenty-four little Ethernet excursions around the cabinet before they finally reach a switch sitting several U away.
It isn’t mandatory, though. Your layout also needs to account for cable management, equipment depth, ventilation, power connections and where heavier equipment is best placed.
Think of the rack as a complete system rather than a sequence of individually convenient mounting decisions.
Do rear plugs, connectors and cable bends need to be included when checking equipment depth?
Very much so.
The chassis depth tells you where the equipment finishes. It doesn’t tell you where the installation finishes.
An IEC plug, RJ45 connector, fibre lead or other rear connection can require significant additional space, and cables need a sensible bend rather than being folded immediately against the rear panel.
This is one reason the recommended equipment depth is deliberately smaller than the available internal depth. A switch that fits perfectly until somebody attempts to connect electricity to it has only passed the first half of the examination.
How much weight must the wall and its fixings actually support?
The whole lot.
If the cabinet weighs 20kg and you put 50kg of equipment inside it, the wall is supporting approximately 70kg. Describing the equipment as being within a 60kg cabinet rating doesn’t make the cabinet's own 20kg disappear.
And the cabinet rating tells you what the cabinet can carry. It doesn’t certify the brick, block, timber, plasterboard or whatever fixing system sits between the cabinet and the building.
Wall capacity and cabinet capacity are separate questions. Both need satisfactory answers.