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Cabinet Selection Guidelines
Cabinet Selection Guidelines
Equipment intended for installation in controlled environmental space have average yearly levels of
contamination. Ventilated cabinets or racks can be used if pollutant levels are maintained within allowable
limits.
Equipment intended for installation in outside platnt (OSP) areas must have sealed cabinets with heat exchanger
that meet the NEMA -4 or IP66 protection and low average yearly levels of concentration of contaminants
inside the cabinet.
Note
Ventilated cabinets and racks are not recommended for OSP applications.
Table 6: Cabinet Type for Indoor and Outdoor Installation
Cabinet Type
Open rack with no front and rear
doors
Ventilated cabinets with normal air
filter at intake and fans
Sealed cabinets with heat
exchanger that meet NEMA -4 or
IP66 protection
Sealed cabinets with
air-conditioners that meet NEMA
-4 or IP66 protection
Allowable limits for Environmental Pollutants
Concentration of pollutant levels in outdoor and indoor environment shall be less than pollutant levels mentioned
in Table 2.3 and Table 2.4 of NEBS GR-63-CORE Issue 5 Dec 2017 respectively. High concentration of
pollutants have a negative impact on the equipment life time.
Allowable Temperature and Humidity
Maximum allowable temperature and humidity levels must be within the values mentioned in the data sheets.
It is not recommended to have installation where condensation may occur, or equipment is exposed to high
humidity for long time, such as near the sea, rivers, and large water bodies.
Installations in Highly-corrosive Environment
Installation in highly corrosive areas is not recommend. Examples of highly corrosive area are seashore, less
than 10 meters from high traffics roadway, and areas having high industrial pollutants.
Periodic Measurement of Environmental Pollutants
It is recommended to check concentration of pollutants periodically. Necessary protection should be provided
to equipment to ensure the equipment is not exposed to high concentration level of pollutants.
Cisco NCS 560-4 Router Hardware Installation Guide
30
Suitable for Indoor Installation?
Yes
Yes
Yes
Yes
Preparing for Installation
Suitable for Outdoor Installation?
No
No
Yes
Yes
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