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# Anode Resistance to Earth

## Anode Resistance to Earth

Soil Resistivity =     ohm-cm
Anode Length =    feet
Anode Diameter =     inches*
Multiple Anodes
(Leave blank for single anode configuration)
Number of Anodes =    anodes
Anode Spacing =    feet
Horizontal Configuration
(Leave blank for vertical anode configuration)
Anode Depth =    feet**
Resistance =     ohms

This calculator can be used to calculate resistance of anode to coke breeze or resistance of coke column to earth. When used to calculate resistance of coke column to earth, the result may be a reasonable approximation of total groundbed resistance; however, factors such as cable resistance and anode to coke resistance are not included. * The program converts inches to feet.

** Anode depth is doubled by the program

#### Single Vertical Anode

##### Formula Used:
Where
R = resistance in ohms
L = anode length in feet
d= anode diameter in feet
p = resistivity in ohm-cm
ln is the natural logarithm function
N = the number of anodes = 1

#### Multiple Vertical Anodes in Parallel

##### Formula Used:
Where
R = resistance in ohms
L = anode length in feet
N = the number of anodes
S = anode spacing in feet
d = anode diameter in feet
p = resistivity in ohm-cm
ln is the natural logarithm function

#### Multiple Horizontal Anodes

##### Formula Used:
Where
R = resistance in ohms
L = anode length in feet
S = twice the depth of anode in feet
N = the number of anodes
d = anode diameter in feet
p = resistivity in ohm-cm
ln is the natural logarithm function