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5.1
Overhead Method .......................................39
5.1.1
General ...............................................39
5.1.2
Limitations ...........................................39
5.2
Underground Method ....................................39
5.2.1
Applications ..........................................39
5.2.2
Expansibility .........................................39
6.1
Criteria Coverage .....................................40
6.2
System Voltages .......................................40
6.2.1
Power Generated at Site ...............................40
6.2.2
Purchased Energy ......................................40
6.2.2.1
2,400 V System ........................................40
6.2.2.2
4,160 V System ........................................40
6.2.2.3
6,900 V System ........................................40
6.2.2.4
12,000 V to 13,800 V Systems ..........................40
6.2.2.5
15,000 V to 34,500 V Systems ..........................40
7.1
General Requirements ..................................41
7.2
Methods ...............................................41
7.2.1
Solid Grounding .......................................41
7.2.2
Resistance Grounding ..................................41
7.2.3
Reactance Grounding ...................................41
8.1
Selection Factors .....................................42
8.2
Systems Available .....................................42
8.2.1
Conventional Simple-Radial Distribution System ........42
8.2.2
Modern Simple-Radial Distribution System ..............42
8.2.3
Modified Modern Simple-Radial Distribution System .....42
8.2.4
Loop Primary-Radial Distribution Type .................42
8.2.5
Banked Secondary-Radial Distribution System ...........42
8.2.6
Primary Selective-Radial Distribution System ..........42
8.2.7
Secondary Selective-Radial Distribution System ........49
8.2.8
Simple Network Distribution System ....................49
8.2.8.1
Network Protector .....................................49
8.2.8.2
Limitation ............................................49
8.2.8.3
Secondary Loops .......................................49
8.2.9
Simple Spot-Network Distribution System ...............52
8.2.10
Primary Selective Network Distribution System .........52
8.2.11
Primary Selective Spot-Network Distribution System ....52
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