Earth Resistance Testing By Loop Method - Fluke 165X Installation Manual

Figure 11. Display After Zeroing
Press and release T. Wait for the test to complete.
4.
5. The primary (upper) display shows the loop
impedance.
To read the Prospective Fault Current, press the 3
6.
key and select l . The PFC appears in amps or
K
kiloamps in the secondary (lower) display.
Errors may occur due to preloading the circuit
under test.
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Note

Earth Resistance Testing 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 cord to perform this test. Use the connection shown
in Figure 12 when making a 3-wire connection for earth
resistance loop test.
N (Blue)
L (Red)
Figure 12. 3-Wire Connection for Earth Resistance
Loop Test
Electrical Installation Tester
Making Measurements
PE
PE (Green)
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L
N
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