Field applications – ERICO EST401 ERITECH Clamp-on Ground Resistance Tester User Manual
Page 17
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Field Applications
Note: A high reading or OL indicates one or more of the following:
A. Poor ground rod
B. Open ground conductor
C. High resistance bonds on the rod or splices on the conductor;
watch for buried split butts, clamps, and hammer-on connections.
Service Entrance or Meter
Follow the same procedure as for Pole Ground Rods. Notice that Fig. 15 shows multiple
ground rods and in Fig. 16 the ground rods have been replaced with a water pipe ground.
You may also have both types acting as a ground. In these cases, it is necessary to make
the measurements between the service neutral and both grounded points.
Figure 15
Figure 16
E1154IS06 EST401_5.qxd:E1154IS06 9/25/06 1:46 PM Page 15
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