standards and guidelines for communication sites - Radio And ...
standards and guidelines for communication sites - Radio And ... standards and guidelines for communication sites - Radio And ...
SITE PREPARATION CONSIDERATIONS APPENDIX B: SOIL RESISTIVITY MEASUREMENTS Location “1 of 5” 3 m (10 ft.) spacing is measured on Ground Resistance Tester. In this example, tester reads “2.1 Ω”. “2.1” is written down in “Meter Readings” column for Location “1 of 5” (10 ft. spacing) in Worksheet. ρ value for Location “1 of 5” 10 ft spacing is calculated using formula on Worksheet. ρ value of “4021.5” is written down in “Soil Resistivity Calculations” column for Location “1 of 5” (10 ft spacing) in Worksheet. Location Spacing (Test Depth) 1 of 5 ρ= 4021.5 ρ= 4021.5 2 of 5 ρ= 4308.8 ρ= 4787.5 3 of 5 ρ= 4021.5 ρ= 4404.5 FIGURE B-6 EXAMPLE WORKSHEET AND NOMOGRAPH (SHEET 1 OF 3) 1.52 m (5 ft.) Meter Readings (steps 2 through 5) 1 of 5 4.2 2.1 2 of 5 4.5 2.5 3 of 5 4.2 2.3 3 m (10 ft.) B-12 68P81089E50-B 9/1/05
STANDARDS AND GUIDELINES FOR COMMUNICATION SITES SITE PREPARATION CONSIDERATIONS 1. Points corresponding to 5/8-in dia. electrode and 10-ft. depth are plotted on “d” and “L” scales. 4. Line is drawn connecting the points where “q” scale is intersected by “d-L” line, and the point on “ρ” scale. Line is extended to “R” scale to obtain resistance for electrode (in this example, 15 Ω). q L R d 7 5 3 1 5/8 1/4 8 6 4 2 3/4 0.5 90 70 50 30 15 5 3 1 100 80 60 40 20 10 4 2 ρ 100 40 20 10 4 2 0.5 50 30 15 5 3 1 90 70 50 30 15 5 3 1 100 80 60 40 20 10 4 2 q FIGURE B-6 EXAMPLE WORKSHEET AND NOMOGRAPH (SHEET 2 OF 3) 2. Line is drawn connecting points on “d” and “L” scales. 3. ρ value from Worksheet is plotted on “ρ” scale (in this example, 4.02 kΩ-cm). 68P81089E50-B 9/1/05 B-13
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- Page 405 and 406: APPENDIX A ELECTROMAGNETIC ENERGY I
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- Page 433 and 434: APPENDIX B SOIL RESISTIVITY MEASURE
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- Page 467 and 468: APPENDIX C PROTECTING AGAINST ELECT
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- Page 471 and 472: APPENDIX D GROUNDING (EARTHING) ELE
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SITE PREPARATION CONSIDERATIONS APPENDIX B: SOIL RESISTIVITY MEASUREMENTS<br />
Location “1 of 5” 3 m (10 ft.) spacing is<br />
measured on Ground Resistance Tester.<br />
In this example, tester reads “2.1 Ω”.<br />
“2.1” is written down in “Meter Readings”<br />
column <strong>for</strong> Location “1 of 5”<br />
(10 ft. spacing) in Worksheet.<br />
ρ value <strong>for</strong> Location “1 of 5” 10 ft spacing is<br />
calculated using <strong>for</strong>mula on Worksheet.<br />
ρ value of “4021.5” is written down in “Soil<br />
Resistivity Calculations” column <strong>for</strong> Location<br />
“1 of 5” (10 ft spacing) in Worksheet.<br />
Location Spacing (Test Depth)<br />
1 of 5 ρ= 4021.5 ρ= 4021.5<br />
2 of 5 ρ= 4308.8 ρ= 4787.5<br />
3 of 5 ρ= 4021.5 ρ= 4404.5<br />
FIGURE B-6 EXAMPLE WORKSHEET AND NOMOGRAPH (SHEET 1 OF 3)<br />
1.52 m<br />
(5 ft.)<br />
Meter Readings (steps 2 through 5)<br />
1 of 5 4.2 2.1<br />
2 of 5 4.5 2.5<br />
3 of 5 4.2 2.3<br />
3 m<br />
(10 ft.)<br />
B-12 68P81089E50-B 9/1/05
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