General Site Guidelines for J-EX Series SwitchesEfficient switch operation requires proper site planning and maintenance and properlayout of the equipment, rack or cabinet (if used), and wiring closet.To plan and create an acceptable operating environment for your J-EX Series switch andprevent environmentally caused equipment failures:• Keep the area around the chassis free from dust and conductive material, such asmetal flakes.• Follow prescribed airflow guidelines to ensure that the cooling system functions properlyand that exhaust from other equipment does not blow into the intake vents of theswitch.• Follow the prescribed ESD prevention procedures to avoid damaging the equipment.Static discharge can cause components to fail completely or intermittently over time.• Install the switch in a secure area, so that only authorized personnel can access theswitch.RelatedDocumentationPrevention of Electrostatic Discharge Damage on J-EX Series Switches on page 198•• Clearance Requirements for Airflow and Hardware Maintenance for J-EX4200 Switcheson page 66• Environmental Requirements and Specifications for J-EX Series Switches on page 60Site Electrical Wiring Guidelines for J-EX Series SwitchesTable 24 on page 59 describes the factors you must consider while planning the electricalwiring at your site.WARNING: It is particularly important to provide a properly grounded andshielded environment and to use electrical surge-suppression devices.Table 24: Site Electrical Wiring GuidelinesGuidelinesSite Wiring FactorIf your site experiences any of the following problems, consultexperts in electrical surge suppression and shielding:• Improperly installed wires cause radio frequency interference(RFI).• Damage from lightning strikes occurs when wires exceedrecommended distances or pass between buildings.• Electromagnetic pulses (EMPs) caused by lightningdamages unshielded conductors and electronic devices.Signaling limitations59Chapter 4: Site Preparation
