MIL-HDBK-1004/2A
Page
2.2.4.3
Insulation Levels...............................
9
2.2.5
Hardware........................................
9
2.3
Line Equipment..................................
9
2.3.1
Step-Voltage Regulators.........................
9
2.3.2
Capacitors......................................
10
2.4
Transformers....................................
10
2.4.1
Pole Mounting...................................
10
2.4.2
At-Grade Mounting...............................
11
2.4.3
Indoor Installation.............................
11
2.4.4
Overload Capacity...............................
11
2.4.5
Transformer Noise Level.........................
11
2.4.6
Overhead Distribution...........................
11
2.5
Circuit Interrupting Devices....................
11
2.5.1
Fuses...........................................
11
2.5.2
Current Limiting Protectors.....................
12
2.5.3
Circuit Breakers................................
12
2.5.4
Automatic Circuit Reclosers.....................
12
2.5.5
Nonload-Break Switches..........................
12
2.5.6
Load-Break Switches.............................
12
2.6
Lightning Protection............................
12
2.6.1
Requirements....................................
12
2.6.2
Application.....................................
13
2.7
Clearances......................................
13
2.7.1
Contingency Interferences.......................
13
2.7.2
Multipurpose Conditions.........................
13
2.8
Grounding.......................................
13
2.8.1
Safety..........................................
13
2.8.2
Ground Resistance Path..........................
13
2.8.3
Maximum Ground Resistance.......................
13
2.8.4
Grounding Methods...............................
13
2.8.4.1
Ground Rods.....................................
13
2.8.4.2
Water Pipe Connections..........................
14
2.8.4.3
Combination of Grounding Methods................
14
2.8.4.4
Ground Connections..............................
14
2.8.5
Overhead Ground Wires...........................
14
2.8.6
Measurement of Ground Resistance................
14
2.9
Service Drop to Buildings.......................
14
2.10
Right-of-Way....................................
15
2.10.1
Widths..........................................
15
2.10.2
Trees...........................................
15
3.1
Circuit Design..................................
16
3.2
Direct Burial...................................
16
3.2.1
Protection......................................
16
3.2.2
Installation....................................
16
3.2.2.1
Trench Dimensions...............................
16
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