Each rack-mounted device requires a certain amount of rack space, also known as a rack unit. A rack unit or 1U is a standard size of 1.75 inches tall Choose a cabinet with at least as much rack space as your equipment requires, and strongly consider choosing a cabinet with extra space for future expansion.
2) Determine the maximum depth required
Measure the depth of the deepest device and add 3 inches to allow for routing. The wall-mounted rack enclosure accommodates up to 36 inches of mounting depth, depending on the model. Cabinets also provide shallow depths to accommodate equipment such as patch panels without requiring much space.
Tip: Some cabinets mount the server vertically or horizontally to reduce the distance the cabinet protrudes from the wall. For example, some models with a 36-inch installation depth protrude less than 5 inches from the wall.
3) Determine the required weight capacity
Add up the weights of all equipment and make sure the rack enclosures are listed with a larger weight capacity.
TIP: The cabinet must be securely mounted on the wall studs to support its full weight.
4) Consider whether the device will be in a harsh environment
Equipment in locations such as factories or warehouses can be dirty, dust, dripping, and splashing.
5) Consider if additional cooling is required
Wall-mounted rack cabinets have perforated doors and side panels to allow ample airflow, but some locations may require additional cooling. Some models support the addition of electric fans or special air conditioning units installed on top of the cabinet.
6) Consider opening the framework in a safe place
If your equipment will be housed in a secure location with controlled access, a wall-mounted open rack may offer an economical alternative.