The easiest way to measure ground resistance using clamp meter, but be carefull! | EEP
4200 Earth Clamp Tester » EllisCo
Kyoritsu 4200 Earth Resistance Clamp Tester | Test Equipment
ETCR2100A Ground Resistance Meter Earth Tester Clamp Digital for Electric Power Telecommunications Meteorology Oil Field Architecture Industrial Electrical Equipment 0.01-200Ω NO Battery: Amazon.com: Industrial & Scientific
UT275 Clamp Earth Ground Tester - UNI-T Meters | Test & Measurement Tools and Solutions
ETCR2000A+ Ground Earth Resistance Tester Digital Clamp Meter Ground Earth Resistance Meter Tester with LCD Display: Amazon.com: Industrial & Scientific