ufc_3-520-01

ufc_3-520-01
INTERIOR ELECTRICAL SYSTEMS - ufc_3-520-010001
INTERIOR ELECTRICAL SYSTEMS - continued
FOREWORD - ufc_3-520-010003
FOREWORD - continued - ufc_3-520-010004
CONTENTS - ufc_3-520-010005
CONTENTS - continued - ufc_3-520-010006
CONTENTS - continued - ufc_3-520-010007
CONTENTS - continued - ufc_3-520-010008
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FIGURES - ufc_3-520-010011
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TABLES
Chapter 1. GENERAL
CODES AND STANDARDS
APPLICABILITY.
MANUAL CONTENT AND ORGANIZATION .
Chapter 2. PRELIMINARY AND DETAILED DESIGN ANALYSIS
ELECTRICAL LOAD CRITERIA.
OVERVIEW OF DETAILED ANALYSIS CRITERIA.
Figure 2-1. Computer Model of Electrical System
SHORT CIRCUIT ANALYSIS .
SHORT CIRCUIT ANALYSIS - continued
Figure 2-2. Completely Symmetric or Asymmetric Current
Evaluation of time -current coordination of protective devices.
VOLTAGE DROP ANALYSIS .
ELECTRICAL COORDINATION .
LIGHTING.
ENERGY ANALYSIS.
Existing Facilities .
Table 2-1. Energy Efficiency Design Options That Frequently Show Savings
ELECTRICAL DRAWINGS
Panel Schedules
Chapter 3. GENERAL POWER SYSTEM CRITERIA
Frequency
Figure 3-1. Single Power Feed to Facility
Figure 3-2. Redundant Power Feed to Facility
SERVICES.
SERVICES - continued
Chapter 4. POWER DISTRIBUTION AND UTILIZATION --TRANSFORMERS
Temperature and kVA.
Figure 4-1. Insulation System Ratings
Impedance.
Noise.
Basic Impulse Insulation Levels (BIL ).
MEDIUM VOLTAGE TRANSFORMERS.
Buck-Boost Transformers.
K-Factor Transformers.
TRANSFORMER INSTALLATION CRITERIA.
Figure 4-2. Spacing Requirements for Transformers Rated 112.5 kVA or Less
Figure 4-4. Installation Requirements for Transformers Rated Over 35,000 Volts
INFORMATION SOURCES - ufc_3-520-010052
INFORMATION SOURCES - continued
Chapter 5. POWER DISTRIBUTION AND UTILIZATION --SWITCHGEAR, LOAD CENTERS, AND BREAKERS
High Impedance Transformers
Ground metal instrument cases.
MEDIUM VOLTAGE SWITCHGEAR .
Insulation Level Rated Impulse Withstand Voltage
Breaker Selection
Panelboards.
Panelboards - continued
MOTOR CONTROL CENTERS.
CIRCUIT LOCKOUT REQUIREMENTS
INFORMATION SOURCES - ufc_3-520-010064
Chapter 6. POWER DISTRIBUTION AND UTILIZATION --RACEWAY AND WIRING
RACEWAY CRITERIA.
RACEWAY CRITERIA - continued - ufc_3-520-010067
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CONVENIENCE OUTLETS AND RECEPTACLES .
CONVENIENCE OUTLETS AND RECEPTACLES - continued
WIRING FOR TEMPORARY POWER AND LIGHTING.
ACCEPTANCE TESTING OF WIRING SYSTEMS
Chapter 7. POWER DISTRIBUTION AND UTILIZATION --MOTORS AND MOTOR CONTROL CIRCUITS
Table 7-1. Minimum Full -Load Motor Efficiencies
Table 7-2. Motor Altitude Derating Factors
Reduced Voltage Starters
ADJUSTABLE SPEED DRIVES
ADJUSTABLE SPEED DRIVES - continued
Chapter 8. POWER DISTRIBUTION AND UTILIZATION --OTHER DESIGN CRITERIA
Table 8-1. Working Space Clearances 600 Volts and Below
Figure 8-2. Associated Equipment Maximum Extension into Work Space
Figure 8-3. Dedicated Clear Space Above Equipment
ENCLOSURES - ufc_3-520-010085
Table 8-2. NEMA Enclosure Types
Table 8-3. Indoor Nonhazardous Locations
Table 8-4. Indoor Hazardous Applications
Table 8-5. Hazardous Location Classifications
Evaluate each location for a possible classification as a hazardous area
METERING
Chapter 9. ELECTRICAL SYSTEM PROTECTION AND COORDINATION
Coordination Study Description.
Ground Fault Currents
Overcurrent Relays
Direct-Acting Trip and Relayed Circuit Breakers
Coordination Curves.
Figure 9-1. Selective Coordination Example
Figure 9-2. Selective Coordination Example with Fuses
Coordination Analysis .
Coordination Study Report.
PROTECTIVE RELAYS .
INSTRUMENT TRANSFORMERS
Table 9-1. Low Voltage Fuse Classifications
OVERLOAD RELAYS
OVERLOAD RELAYS - continued
CIRCUIT BREAKERS
PROTECTIVE DEVICE DESIGNATIONS
Table 9-2. Protective Device Designations
Table 9-2. Protective Device Designations - continued - ufc_3-520-010110
Table 9-2. Protective Device Designations - continued - ufc_3-520-010111
Table 9-3. Protective Device Suffix Designations
Chapter 10. GROUNDING, BONDING, AND LIGHTNING PROTECTION
Figure 10-1. Purpose of Static Grounding
COMMUNICATIONS SYSTEMS GROUNDING AND BONDING.
Commercial Building Grounding and Bonding Requirements for Telecommunications.
LIGHTNING PROTECTION
INFORMATION SOURCES - ufc_3-520-010118
Chapter 11. SURGE PROTECTION
INTRODUCTION .
Figure 11-1. Simplified Facility Layout
INSTALLATION CRITERIA.
Figure 11-3. Optimal Installation of Surge Protector Leads Second Example
Figure 11-4. Unacceptable Installation with Long Surge Protector Leads
Grounding - ufc_3-520-010125
SURGE PROTECTION FOR COMMUNICATIONS AND RELATED SYSTEM
SURGE PROTECTION FOR COMMUNICATIONS AND RELATED SYSTEM - continued
Chapter 12. POWER SYSTEM QUALITY
Figure 12-1. Typical Derating Factor for Three-Phase Induction Motors
Table 12-1. Low Voltage System Classification and Distortion Limits
'UFC 3-520 - Final.PDF' by Eddie Davis - Page 1 of 279
POWER QUALITY DESIGN .
Table 12-2. Power Quality Summary
Filter Reactors.
NONLINEAR LOAD DESIGN CONSIDERATIONS.
NEUTRAL CIRCUIT SIZING FOR NONLINEAR LOAD CONDITIONS.
Figure 12-2. Effect of Single Phase Nonlinear Loads on Neutral Currents
INFORMATION SOURCES.
Chapter 13. EMERGENCY AND STANDBY POWER SYSTEMS
ESTABLISHING THE NEED FOR BACKUP POWER.
CLASSIFYING EMERGENCY POWER LOADS.
ENGINE GENERATORS
ENGINE GENERATORS - continued - ufc_3-520-010143
ENGINE GENERATORS - continued - ufc_3-520-010144
UPS SYSTEMS .
Table 13-1. Performance of Selected UPS Designs
Sizing
Selection of a Large UPS System or Multiple Smaller UPS Systems.
Design Criteria . - ufc_3-520-010149
Site Survey for an Installation .
Transfer Methods.
Figure 13-1. Open Transition Transfer
Figure 13-2. Closed Transition Transfer
Fast Transfer (Break Before Make)
Table 13-3. Typical ATS Continuous Current Ratings
Table 13-4. Typical ATS Fault Current Ratings
Simultaneous Closure of Both ATS Power Sources
Sizing.
Figure 13-3. Induction Motor Open Circuit Voltage Decay
Maintaining Ground Fault Protection.
Information Sources - ufc_3-520-010161
Chapter 14. STATIONARY BATTERY SYSTEMS
Selection.
Figure 14-1. Battery Room Clearances
Figure 14-2. Two-Step Battery Rack Configurations (End V iew)
Figure 14-3. Larger Battery Rack Configurations (End View)
Installation Design Considerations.
Installation Requirements.
BATTERY CHARGERS.
BATTERY PROTECTION .
Chapter 15. LIGHTING
Chapter 16. COMMUNICATIONS AND INFORMATION SYSTEMS
Chapter 17. AUXILIARY AND SUPPORT SYSTEMS
CLOCK SYSTEMS
Chapter 18. FACILITY-SPECIFIC DESIGN CRITERIA
HIGH-ALTITUDE ELECTROMAGNETIC PULSE (HEMP) AND TEMPEST PROTECTION
SEISMICALLY QUALIFIED DESIGNS
GLOSSARY - ufc_3-520-010178
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GLOSSARY - continued - ufc_3-520-010180
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Terms - ufc_3-520-010184
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Terms - continued - ufc_3-520-010186
Terms - continued - ufc_3-520-010187
Terms - continued - ufc_3-520-010188
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Appendix A. REFERENCES - ufc_3-520-010190
Appendix A. REFERENCES - continued - ufc_3-520-010191
Appendix A. REFERENCES - continued - ufc_3-520-010192
Appendix A. REFERENCES - continued - ufc_3-520-010193
Appendix A. REFERENCES - continued - ufc_3-520-010194
Appendix A. REFERENCES - continued - ufc_3-520-010195
Appendix A. REFERENCES - continued - ufc_3-520-010196
Appendix A. REFERENCES - continued - ufc_3-520-010197
Appendix B. CALCULATION METHODS AND EXAMPLES
Figure B -2. Sample Short Circuit Results--2 MVA Transformer
Figure B -3. Overduty Molded Case Circuit Breakers
VOLTAGE DROP .
TRANSFORMER IMPEDANCE EFFECTS .
TRANSFORMER SIZING
ENERGY SAVINGS WITH OVERSIZED CONDUCTORS
ENERGY SAVINGS WITH OVERSIZED CONDUCTORS - continued - ufc_3-520-010205
ENERGY SAVINGS WITH OVERSIZED CONDUCTORS - continued - ufc_3-520-010206
Figure B -4. Adjustable Speed Drive Economic Evaluation
Figure B -5. Typical Motor Load Profile With Motor Operating at Half of Rated Load
Table B -1. Example Adjustable Speed Drive Energy Savings Worksheet
Figure B -6. Lead Length Effect on Let-Through Voltage
AUTOMATIC TRANSFER SWITCH SIZING
Appendix C. AUTOMATIC TRANSFER SWITCH SIZING
Determining Capacitor Size
Table C -1. Correction Factors for Capacitor Sizing
Table C -1. Correction Factors for Capacitor Sizing - continued
Table C -2. Common Capacitor Reactive Power Ratings
Design Criteria . - ufc_3-520-010217
Information Sources - ufc_3-520-010218
Appendix D. SURGE PROTECTOR PERFORMANCE AND EVALUATION CRITERIA
Figure D-1. UL 1449 Listed Surge Protector
UL 1449 Surge Suppression Rating.
Table D -2. Minimum Recommended MCOV Ratings
Table D -3. Minimum Allowed Surge Current Rating
Modes of Protection.
Figure D -3. Example of Internally Fused Surge Protector
Figure D -4. Excessive Lead Length Caused by Over-Sized Enclosure
Clamping Voltage
Appendix E. STATIONARY BATTERY AND CHARGER SIZING
Figure E -1. Generalized Duty Cycle
Table E -1. Temperature Correction Factors for Vented Lead-Acid Cells (1.215 Specific Gravity)
BATTERY SIZING FOR UPS APPLICATIONS.
BATTERY SIZING FOR UPS APPLICATIONS - continued - ufc_3-520-010232
BATTERY SIZING FOR UPS APPLICATIONS - continued - ufc_3-520-010233
BATTERY SIZING FOR ENGINE STARTING APPLICATIONS.
BATTERY SIZING FOR ENGINE STARTING APPLICATIONS - continued - ufc_3-520-010235
BATTERY SIZING FOR ENGINE STARTING APPLICATIONS - continued - ufc_3-520-010236
Appendix F. INTERIOR LIGHTING
APPLICABLE DOCUMENTS AND STANDARDS.
DETERMINING LIGHT QUANTITY REQUIREMENTS
Figure F -1. Lighting Plan Showing Phase Rotated HID Luminaires
Table F -1. Light Source Applications According to Source Color
Table F -2. Appropriate Color Rendering Indices
HUMAN FACTORS.
Other Human Factors.
Full Size and U -Bent Fluorescent Lamps.
Mercury Vapor Lamps.
High Pressure Sodium Lamps.
SETTING ENVIRONMENTAL AND INSTALLATION REQUIREMENTS
SELECTING LUMINAIRES.
Wraparounds
Considerations for Incandescent, HID, or Compact Fluorescent Lamps.
LIGHTING CALCULATIONS
Calculations of Lighting for Exterior Areas.
Table F -3. Control Considerations for Various Light Sources
Table F -4. Energy Savin gs when Combining Controls
Dimming Controls .
Dimming Controls - continued
Figure F -2. Lumen Maintenance
DAYLIGHTING.
EMERGENCY AND EXIT LIGHTING.
Emergency Lighting Requirements.
Exit Marking Requirements.
Tactile Signage.
CRITERIA FOR SPECIFIC FACILITIES.
Special Considerations for Computer Intensive Workspaces
Health Care Facilities.
RETROFITTING.
Existing Fluorescent Industrial Luminaires, Wraparounds, and Strip Lights
Existing Exit Signs
Table F -5. THD of Various Devices
Appendix G. AIR FORCE COMMUNICATIONS AND INFORMATION SYSTEMS
REFERENCE DOCUMENTS
Communications Systems
Table G-1. CER Size Requirements
Modular/Movable Equipment and Construction Items
Communications and Information Engineering Management
Table G-2. Project Book Reminders for Communications and Information Systems
Table G-2. Project Book Reminders for Communications and Information Systems - continued - ufc_3-520-010278
Table G-2. Project Book Reminders for Communications and Information Systems - continued - ufc_3-520-010279

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