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Coated Pipe Chart
Soil Resistivity in ohm-cm | 1K | 2K | 3K | 4K | 5K | 6K | 7K | 8K | 9K | 10K | |||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Anode Recommendation | 48# | 48# | 32# | 17# | 17# | 9# | 9# | 9# | 9# | 9# | |||
Nominal Output in milliamperes | 208 | 104 | 55 | 40 | 33 | 20 | 17 | 15 | 14 | 12 | |||
Nominal Life in years | 11 | 22 | 28 | 20 | 25 | 22 | 25 | 29 | 32 | 36 | |||
Pipe inch | O.D. inch | Surface Area Ft2/L.F. | Current Reqmt. mA/L.F. | Nominal Anode Spacing in feet | |||||||||
2 | 2.275 | 0.60 | 0.06 | 3494 | 1747 | 924 | 672 | 554 | 336 | 286 | 252 | 235 | 202 |
4 | 4.50 | 1.18 | 0.12 | 1766 | 883 | 467 | 340 | 280 | 170 | 144 | 127 | 119 | 102 |
6 | 6.625 | 1.73 | 0.17 | 1200 | 600 | 317 | 231 | 190 | 115 | 98 | 87 | 81 | 69 |
8 | 8.625 | 2.26 | 0.23 | 922 | 461 | 244 | 177 | 146 | 89 | 75 | 66 | 62 | 53 |
10 | 10.75 | 2.81 | 0.28 | 739 | 370 | 196 | 142 | 117 | 71 | 60 | 53 | 50 | 43 |
12 | 12.75 | 3.34 | 0.33 | 623 | 312 | 165 | 120 | 99 | 60 | 51 | 45 | 42 | 36 |
14 | 14.00 | 3.66 | 0.37 | 568 | 284 | 150 | 109 | 90 | 55 | 46 | 41 | 38 | 33 |
16 | 16.00 | 4.19 | 0.42 | 497 | 248 | 131 | 96 | 79 | 48 | 41 | 36 | 33 | 29 |
18 | 18.00 | 4.71 | 0.47 | 442 | 221 | 117 | 85 | 70 | 42 | 36 | 32 | 30 | 25 |
20 | 20.00 | 5.23 | 0.52 | 397 | 199 | 105 | 76 | 63 | 38 | 32 | 29 | 27 | 23 |
22 | 22.00 | 5.76 | 0.58 | 361 | 181 | 96 | 69 | 57 | 35 | 30 | 26 | 24 | 21 |
24 | 24.00 | 6.28 | 0.63 | 331 | 166 | 88 | 64 | 53 | 32 | 27 | 24 | 22 | 19 |
26 | 26.00 | 6.80 | 0.68 | 306 | 153 | 81 | 59 | 49 | 29 | 25 | 22 | 21 | 18 |
28 | 28.00 | 7.33 | 0.73 | 284 | 142 | 75 | 55 | 45 | 27 | 23 | 20 | 19 | 16 |
30 | 30.00 | 7.85 | 0.79 | 265 | 132 | 70 | 51 | 42 | 25 | 22 | 19 | 18 | 15 |
32 | 32.00 | 8.37 | 0.84 | 248 | 124 | 66 | 48 | 39 | 24 | 20 | 18 | 17 | 14 |
34 | 34.00 | 8.90 | 0.89 | 234 | 117 | 62 | 45 | 37 | 22 | 19 | 17 | 16 | 13 |
36 | 36.00 | 9.42 | 0.94 | 221 | 110 | 58 | 42 | 35 | 21 | 18 | 16 | 15 | 13 |