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3.1
Policy ................................................25
3.2
Economic Factors ......................................25
3.3
Electric Power Sources ................................25
3.3.1
Primary ...............................................25
3.3.2
Standby ...............................................25
3.3.3
Emergency .............................................25
3.3.4
Uninterruptible (No-Break) Electric Power .............26
3.4
Acceptable Electric Power Sources .....................26
3.4.1
Primary ...............................................26
3.4.2
Standby ...............................................26
3.4.3
Emergency .............................................26
3.4.4
Uninterruptible (No-Break) Electric Power .............26
3.5
Purchased Electric Power Requirements .................26
3.5.1
Adequacy ..............................................27
3.5.2
Reliability ...........................................27
3.5.3
Rates .................................................27
3.5.4
Primary Service Right-of-Way ..........................27
3.5.5
Primary Substations ...................................28
3.5.5.1
Voltage ...............................................28
3.5.5.2
Economics .............................................
4.1
Requirements ..........................................29
4.2
Criteria ..............................................29
4.3
Power Load Categories .................................29
4.4
Definitions ...........................................30
4.5
Redundancy ............................................34
4.5.1
"Cold" Standby Redundant UPS System ...................34
4.5.2
Parallel Redundant UPS System .........................34
4.6
Electric Service and Bypass Connectors ................34
4.6.1
Electric Service Size .................................34
4.6.2
Maintenance Bypass Provisions .........................34
4.7
UPS Distribution System ...............................36
4.7.1
Critical Load Protection ..............................36
4.7.2
Critical Motor Loads ..................................36
4.8
Emergency Electric Power Source Requirements ..........36
4.8.1
Automatic Operation ...................................36
4.8.2
Paralleling ...........................................36
4.8.3
Starting and Maintenance Considerations ...............37
4.8.4
Service Configuration for Small Loads .................37
4.8.5
Battery Charging Restrictions .........................37
4.9
Electromagnetic Interference (EMI) Suppression ........37
4.10
UPS Battery ...........................................37
4.11
Remote Alarms .........................................37
4.12
UPS and Battery Room Requirements .....................37
4.12.1
Installation Considerations ...........................38
4.12.1
NEC, OSHA, and ANSI Requirements ......................38
4.12.3
Emergency Lighting Requirements .......................38
4.12.4
Telephone Requirements ................................38
4.13
Environmental Control .................................38
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