What Size Server Rack or Network Cabinet Do I Need? A Simple Guide for Homes and Small Offices

TL;DR: Count the rack units (U) your equipment uses, then add about 50% for growth. A fibre router, switch and patch panel fit a 6U–9U wall cabinet (R1,650–R2,422). Add a NAS or small server and you need a 12U–25U floor cabinet, 600 mm deep (R4,285–R6,123). Full-size rack servers need 42U–47U at 800–1,000 mm deep (R9,051–R13,105).

What does “U” mean on a server rack?

A rack unit (U) is the standard height of equipment in a 19-inch rack: 1U = 44.45 mm (1.75 inches). A 9U cabinet has 9 × 44.45 mm of mounting space. Typical sizes:

Equipment	Height
24- or 48-port patch panel	1U
24-port switch	1U
Cable management bar	1U
Fixed or sliding shelf (for a router, NVR or ONT)	1U, plus the height of what sits on it
Rack PDU (power strip)	1U, or mounted at the back
Rack server	1U–4U
Rack UPS	2U–3U

How to work out the size you need

1. List everything going in and add up the U. Desktop devices like a fibre router or a DVR count as the shelf height plus their own height, rounded up.
2. Add 30–50% spare for new switches, a UPS or airflow gaps. Running out of space is the most common regret.
3. Check depth. Switches and patch panels are shallow (under 300 mm), but servers and rack UPSs can be 600–800 mm deep. Measure your deepest device and add about 100 mm for cables and plugs.
4. Check the wall. A loaded wall cabinet is heavy, so mount it on brick or concrete, not drywall.

Example: a small office. A patch panel (1U), a 24-port switch (1U), a cable manager (1U), a shelf for the fibre router (2U) and a PDU (1U) add up to 6U. With spare space, choose a 9U wall cabinet.

Wall-mount or floor-standing cabinet?

	Wall-mount (4U–15U)	Floor-standing (12U–47U)
Best for	Home networks, CCTV, small offices, fibre and Wi-Fi	Servers, NAS, rack UPS, growing offices
Typical depth	450–600 mm	600–1,000 mm
Rear access	Choose a swing-frame model, which hinges open to the back	Removable side and rear panels
Price at JLS	From R1,170	From R4,285

Wall-mount cabinets in stock (4U to 15U)

Cabinet	Size	Notes	Price
Netix 4U	600 × 450 mm	Router, small switch and patch panel	R1,170
RCT 4U glass door	450 mm deep	Cable glands included	R1,415
Netix 9U fixed	600 × 450 mm	Best value 9U	R1,596
RCT 6U glass door	450 mm deep	Cable glands included	R1,618
Netix 6U swing	600 mm wide	Swing frame for rear access	R1,650
Zone Lite 6U with fan	450 mm deep	Fan included, good for CCTV NVRs	R1,877
Netix 9U swing	600 mm	Swing frame	R2,022
Zone Lite 9U swing	400 + 200 mm	Swing frame, fan	R2,422
Netix 15U fixed	600 × 600 mm	The largest wall option, fits a short NAS	R2,555

Floor-standing server cabinets (12U to 47U)

Cabinet	Size (W × D)	Price
RCT 12U server cabinet, perforated door	600 × 600 mm	R4,285
RCT 25U server cabinet, perforated door	600 × 600 mm	R6,123
Netix 42U server cabinet	600 × 800 mm	R9,051
Apollo 42U, perforated	600 × 800 mm	R9,552
RCT 47U server cabinet, perforated door	600 × 1,000 mm	R13,105

Perforated doors let servers breathe. For full-depth rack servers such as Dell PowerEdge or HPE ProLiant, choose a 1,000 mm deep cabinet like the RCT 47U.

What goes inside: the essential accessories

• Patch panel: Datanet CAT6 24-port (R416) or Netix CAT6 48-port (R638). Datanet CAT6A 24-port (R830) suits 10 Gb runs.
• Rack switch: Cudy GS1024 24-port gigabit (R796) or TP-Link TL-SG1024 (R1,513).
• Shelf for routers, ONTs, NVRs and mini PCs: Intellinet 1U fixed shelf (R446), or an RCT 750 mm sliding shelf (R845) for 1 m cabinets.
• Power: a Zone 6-way metal PDU (R384). Our surge protection guide covers protecting the rack from storms.
• Cooling: a cabinet fan (R265) for closed wall cabinets with a PoE switch or NVR.

Browse all networking products, or send your equipment list to the quote desk and we’ll size the cabinet and accessories for you. Delivery is free in Pretoria and on orders over R5,000 nationwide.

FAQs about server racks

What is the difference between a server rack and a network cabinet?

The terms are often used interchangeably. Strictly, a “rack” can be an open frame, while a “cabinet” has doors and side panels. For homes and offices, a lockable cabinet keeps equipment dust-free and secure.

What size rack do I need for a home network?

For a fibre router, switch and patch panel, a 4U–6U wall cabinet is enough. With a NAS or CCTV recorder, choose 9U.

Will a desktop switch fit in a rack?

Only on a shelf, unless it comes with rack ears. Many 16- and 24-port switches, like the TP-Link TL-SG1024D, are desktop/rackmount and include ears.

How deep should a server cabinet be?

Networking-only cabinets can be 450–600 mm. Cabinets for rack servers should be 800–1,000 mm deep to leave room for the server and its cables.