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Table of Contents 1 General Site Preparation Guidelines...........................................................................7 Electrical Factors.....................................................................................................................................7 Synopsis.............................................................................................................................................7 AC Electrical Distribution System...............................................................................................7 AC Power Quality Devices..........................................................................................................8 UPS Recommendations................................................................................................................8 Power Consumption....................................................................................................................8 Grounding Systems......................................................................................................................9 Comprehensive Discussion...............................................................................................................9 Computer Room Safety...................................................................................................................10 Fire Protection............................................................................................................................10 Fire Suppression.........................................................................................................................10 Lighting Requirements for Equipment Servicing......................................................................10 Cabinet Recommendations........................................................................................................10 Working Space for Product Access............................................................................................11 Power Consumption........................................................................................................................11 Electrical Load Requirements (Circuit Breaker Sizing)...................................................................11 Power Quality..................................................................................................................................11 Sources of Voltage Fluctuations.................................................................................................11 Power System Protection............................................................................................................12 Distribution Hardware....................................................................................................................12 Wire Selection.............................................................................................................................12 Raceway Systems (Electrical Conduits) (LAHJ).........................................................................12 Building Distribution.................................................................................................................13 Grounding Systems.........................................................................................................................13 Power Distribution Safety Grounding (LAHJ)..........................................................................13 Main Building Electrical Ground..........................................................................................13 Electrical Conduit Ground....................................................................................................13 Power Panel Ground.............................................................................................................13 Computer Safety Ground.....................................................................................................13 Dual Power Source Grounding.............................................................................................14 Cabinet Performance Grounding (High-Frequency Intercabinet Ground)...............................14 Raised Floor “High-Frequency Noise” Grounding...................................................................14 Equipment Grounding Implementation Details........................................................................15 System Installation Guidelines........................................................................................................15 Acclimatization..........................................................................................................................16 Wiring Connections....................................................................................................................16 Data Communications Cables....................................................................................................16 Environmental Elements.......................................................................................................................16 Synopsis...........................................................................................................................................16 Air Quality.................................................................................................................................16 Airflow.......................................................................................................................................17 Equipment Orientation..............................................................................................................18 Electrostatic Discharge (ESD): Source of Greatest Failure Rate Without Detection..................18 Cellular Telephone and Wireless Usage.....................................................................................18 Comprehensive Discussion.............................................................................................................18 Computer Room Preparation..........................................................................................................19 Airflow.............................................................................................................................................19 Row Orientation.........................................................................................................................19 Dust and Pollution Control........................................................................................................20 Metallic Particulate Contamination...........................................................................................21 Table of Contents 3