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FALL-OF-POTENTIAL METHOD TESTING PROCEDURE APPENDIX D: GROUNDING (EARTHING) ELECTRODE SYSTEM TESTING/VERIFICATION Shelter Site Boundary = Grounding Electrode System Diagonal 3.05 m (10 ft.) 6.1 m (20 ft.) 9.2 m (30 ft.) NOTE: Connection point of meter X clip is typically to external master ground bus. Test Point (NOTE) (X connecting point) Tower 12.2 m (40 ft.) 15.2 m (50 ft.) Required placement of Z probe (In this example, the 30 x 30 ft. site requires 129 m (424 ft.) from the planar center of the grounding electrode system under test <strong>and</strong> the Z probe) FIGURE D-3 OUTER REFERENCE ELECTRODE (Z-PROBE) PLACEMENT FOR A TYPICAL SITE D-6 68P81089E50-B 9/1/05 128 m (420 ft.) 131 m (430 ft.) 134 m (440 ft.) 137 m (450 ft.)
STANDARDS AND GUIDELINES FOR COMMUNICATION SITES FALL-OF-POTENTIAL METHOD TESTING PROCEDURE TABLE D-2 REQUIRED Z-PROBE SPACING FOR SITE LENGTHS AND WIDTHS (IN FEET) Site Width (ft) Site Length (ft) 10 20 30 40 50 60 70 80 90 100 10 141 224 316 412 510 608 707 806 906 1005 20 224 283 361 447 539 632 728 825 922 1020 30 316 361 424 500 583 671 762 854 949 1044 40 412 447 500 566 640 721 806 894 985 1077 50 510 539 583 640 707 781 860 943 1030 1118 60 608 632 671 721 781 849 922 1000 1082 1166 70 707 728 762 806 860 922 990 1063 1140 1221 80 806 825 854 894 943 1000 1063 1131 1204 1281 90 906 922 949 985 1030 1082 1140 1204 1273 1345 100 1005 1020 1044 1077 1118 1166 1221 1281 1345 1414 110 1105 1118 1140 1170 1208 1253 1304 1360 1421 1487 120 1204 1217 1237 1265 1300 1342 1389 1442 1500 1562 130 1304 1315 1334 1360 1393 1432 1476 1526 1581 1640 140 1404 1414 1432 1456 1487 1523 1565 1612 1664 1720 150 1503 1513 1530 1552 1581 1616 1655 1700 1749 1803 160 1603 1612 1628 1649 1676 1709 1746 1789 1836 1887 170 1703 1712 1726 1746 1772 1803 1838 1879 1924 1972 180 1803 1811 1825 1844 1868 1897 1931 1970 2012 2059 190 1903 1910 1924 1942 1965 1992 2025 2062 2102 2147 200 2002 2010 2022 2040 2062 2088 2119 2154 2193 2236 68P81089E50-B 9/1/05 D-7
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© 2005 MOTOROLA, INC. ALL RIGHTS R
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TABLE OF CONTENTS Chapter 1. Introd
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STANDARDS AND GUIDELINES FOR COMMUN
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CHAPTER 1 INTRODUCTION 1 This manua
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CHAPTER 2 SITE DESIGN AND DEVELOPME
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CHAPTER 3 COMMUNICATION SITE BUILDI
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CHAPTER 4 EXTERNAL GROUNDING (EARTH
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CHAPTER 5 INTERNAL GROUNDING (EARTH
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CHAPTER 6 POWER SOURCES 6 6.1 LOCKO
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CHAPTER 7 SURGE PROTECTIVE DEVICES
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CHAPTER 8 MINIMIZING SITE INTERFERE
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CHAPTER 9 EQUIPMENT INSTALLATION 9
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APPENDIX A ELECTROMAGNETIC ENERGY I
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Page 425 and 426: STANDARDS AND GUIDELINES FOR COMMUN
Page 433 and 434: APPENDIX B SOIL RESISTIVITY MEASURE
Page 467 and 468: APPENDIX C PROTECTING AGAINST ELECT
Page 471 and 472: APPENDIX D GROUNDING (EARTHING) ELE
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Page 497 and 498: APPENDIX E GENERAL CONVERSIONS AND
Page 503 and 504: APPENDIX F R56 COMPLIANCE CHECKLIST
Page 509 and 510: I NDEX Index Index AC power cabling
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