Table 3: Grounding impedance of electrodes and comparison between practical and theoretical utilization factor.

Electrodes configurationInterval Number of electrodesMeasured impedance Utilization factor deviation

A 0.51ł21.00łłł
0.52ł15.30łłł
0.530.4611.820.590.582.8%
0.540.4610.650.490.51−3.7%
0.550.469.360.450.47−4.6%
1.020.2313.140.800.81−1.2%
1.030.2310.200.690.72−4.2%
1.520.1512.830.820.86−4.7%
2.020.1212.390.850.89−4.5%

B 1.71ł21.0łłł
1.72ł13.11łłł
1.730.259.570.730.712.8%
3.420.1311.940.880.89−1.1%