Quick StartH3C S5500-EI Series Ethernet SwitchesChapter 2 InstallationPreparations2-2z Adequate clearance is reserved at the air inlet/exhaust ventsfor ventilation.z The rack or workbench has a good ventilation system.z The rack is sturdy enough to support the device and itsaccessories.z The rack or workbench is well earthed.To ensure normal operation and long service life of your switch,install it in an environment that meets the requirements described inthe following subsections.2.2.1 Temperature/HumidityYou must maintain a proper temperature and humidity in theequipment room. Long-term high humidity may lead to bad insulation,electricity leakage, mechanical property changes, and metal corrosion.However, if the relative humidity is too low, captive screws maybecome loose as the result of contraction of insulation washers andstatic electricity may be produced in a dry environment to jeopardizethe circuits on the device. A high temperature is the most undesirablecondition, because it accelerates the aging of insulation materials andthus significantly lowers reliability and service life of the switch.For the temperature and humidity requirements of differentmodels, refer to section 1.8 “System Specifications of the S5500-EISeries” on page 1-28.2.2.2 CleannessDust is a hazard to the operating safety of your device. The dustaccumulated on the chassis can be adsorbed by static electricity andresult in poor contact of metal connectors or metal contact points.Especially when the indoor relative humidity is low, electrostatic
