Dell PowerConnect J-8216 Hardware Guide - Page 82

Dell PowerConnect J-Series J-EX8216 Ethernet Switch Hardware Guide Table 31: Site Electrical Wiring Guidelines (continued) Site Wiring Factor Guidelines Electromagnetic compatibility If your site is susceptible to problems with electromagnetic compatibility (EMC), particularly from lightning or radio transmitters, seek expert advice. Some of the problems caused by strong sources of electromagnetic interference (EMI) are: • Destruction of the signal drivers and receivers in the switch • Electrical hazards as a result of power surges conducted over the lines into the equipment Related • General Safety Guidelines and Warnings for J-EX Series Switches on page 201 Documentation • General Electrical Safety Guidelines and Warnings for J-EX Series Switches on page 229 • Prevention of Electrostatic Discharge Damage on J-EX Series Switches on page 230 • AC Power Supply in a J-EX8200 Switch on page 39 Environmental Requirements and Specifications for J-EX Series Switches The switch must be installed in a rack or cabinet housed in a dry, clean, well-ventilated, and temperature-controlled environment. Ensure that these environmental guidelines are followed: • The site must be as dust-free as possible, because dust can clog air intake vents and filters, reducing the efficiency of the switch cooling system. • Maintain ambient airflow for normal switch operation. If the airflow is blocked or restricted, or if the intake air is too warm, the switch might overheat, leading to the switch temperature monitor shutting down the switch to protect the hardware components. Table 32 on page 66 provides the required environmental conditions for normal switch operation. Table 32: J-EX Series Switch Environmental Tolerances Description Tolerance Altitude No performance degradation to 10,000 feet (3048 meters) Relative humidity Normal operation ensured in relative humidity range of 10% through 85%, noncondensing Temperature Normal operation ensured in temperature range of 32° F through 104° F (0° C through 40° C) 66