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Users Manual
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Earth Resistance Test by Loop Method
You can also use the Tester to measure the earth resistance component of the total loop
resistance. Check your local regulations to determine if this method is acceptable in your area.
You can use three leads or the mains test cord to do this test. Use the connection shown in
Figure 25 when you make a 3-wire connection for earth resistance loop test. Zero the test
leads before the test. See How to Zero the Test Leads.
Figure 25. 3-Wire Connection for Earth Resistance Loop Test (No Trip Mode)
If necessary to meet local regulations, you can measure the earth resistance with the high-
current trip mode. See Trip Mode (High Current). Any RCD will trip during this test. The test
result will include the resistance of the phase wire and this might be neglected for higher RE
resistances. Use the connection shown in Figure 26 when you make a 2-wire connection for
earth resistance loop test.
Figure 26. 2-Wire Connection for Earth Resistance Loop Test (High-Current Trip Mode)
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