This situation is also more common. For example, in some towers,Earth Resistance Tester five towers are connected to each other through an overhead ground wire; for example, the grounding of some buildings is not an independent grounding grid,Earth Resistance Tester but several grounding bodies are connected to each other through wires. In this case,Earth Resistance Tester if R0 is regarded as 0 in the above figure, it will bring a large error to the measurement result.

For the same reasons as above,Earth Resistance Tester we ignore the influence of mutual resistance and calculate the equivalent resistance of the grounding resistor in parallel according to the usual calculation method. In this way,Earth Resistance Tester for a grounding system of N (N is smaller,Earth Resistance Tester but greater than 2) grounding bodies, N equations can be listed: where: R1, R2, .... RN is the grounding resistance of the N grounding bodies we require . R1T, R2T,... RNT are the measured resistance of each grounding branch with a clamp meter. In principle,Earth Resistance Tester except for ignoring the mutual resistance,Earth Resistance Tester this method does not have the measurement error caused by ignoring R0.

However, users need to pay attention to: in your grounding system,Earth Resistance Tester there are several grounding bodies connected to each other, you must measure the same number of test values for the program to solve,Earth Resistance Tester not more or less. The program also outputs the same number of ground resistance values.