Power basics for IT professionals
technology brief
Abstract
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2
Introduction
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2
General terms
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2
Power generation, transmission, and distribution
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3
Generation and transmission
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3
Present-day power distribution infrastructure
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4
Regional power distribution
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5
Power distribution at the site
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5
Power factor correction
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14
Leakage current
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15
Grounding
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15
Power utilization
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17
Three-phase versus single-phase power
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17
Panel distribution
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18
Distribution within the rack
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19
Uninterruptible Power Supplies (UPS)
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20
Wiring methods
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21
High-line or low-line input voltage
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23
Inrush current
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23
Plugs and receptacles
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24
Power trends and strategies
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24
Tools for powering the data center
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26
Appendix A. United States design standards
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27
Appendix B. Voltages and frequencies of individual countries
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28
Appendix C. Plug and socket types
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31
Glossary
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35
For more information
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44
Call to action
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44