Service Panel - AEMC 3711 User Manual

Service Panel

If we clamp-on the grounding electrode conductor in Fig. 28, the multi-
grounded system required to complete the circuit may be from different
sources. These sources may include the following: Electric Neutral,
Phone, CATV, and Water.
The Electric Utility Neutral should be the principle conductor of the low-
impedance signal return path required to test the resistance of this
ground electrode with the Model 3711/3731. This can be verified by
removing other ground connections, noting if any changes appear in the
readings. If by removing one of these signal return paths a much higher
reading is noted, it could mean that the primary signal return path (the
Electric Neutral) is defective or open.
Warning: For safety reasons do not remove any ground source
without first de-energizing the service panel.
PHONE
CATV
ROUND
ELECTRODE
Ground Resistance Tester Models 3711 and 3731
ELECTRIC
UTILITY
A B NEUTRAL
ERVICE
PANEL
Figure 28
- 28 -
240 VAC
WH
BK
120 VAC
Bare