CP Design Center

Bare 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 1.19 175 87 46 34 28 17 14 13 12 10
4 4.50 1.18 2.36 88 44 23 17 14 8 7 6 6 5
6 6.625 1.73 3.47 60 30 16 12 10 6 5 4 4 3
8 8.625 2.26 4.51 46 23 12 9 7 4 4 3 3 3
10 10.75 2.81 5.63 37 18 10 7 6 4 3 3 2 2
12 12.75 3.34 6.67 31 16 8 6 5 3 3 2 2 2
14 14.00 3.66 7.33 28 14 8 5 5 3 2 2 2 2
16 16.00 4.19 8.37 25 12 7 5 4 2 2 2 2 1
18 18.00 4.71 9.42 22 11 6 4 4 2 2 2 1 1
20 20.00 5.23 10.47 20 10 5 4 3 2 2 1 1 1
22 22.00 5.76 11.51 18 9 5 3 3 2 1 1 1 1
24 24.00 6.28 12.56 17 8 4 3 3 2 1 1 1 1
26 26.00 6.80 13.61 15 8 4 3 2 1 1 1 1 1
28 28.00 7.33 14.65 14 7 4 3 2 1 1 1 1 1
30 30.00 7.85 15.70 13 7 4 3 2 1 1 1 1 1
32 32.00 8.37 16.75 12 6 3 2 2 1 1 1 1 1
34 34.00 8.90 17.79 12 6 3 2 2 1 1 1 1 1
36 36.00 9.42 18.84 11 6 3 2 2 1 1 1 1 1

Calculated values based on current density of 2 milliamperes per square foot.



Courtesy of CP Design Center by MESA Products, Inc.

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