810DX 9/9/2008 REV D
28
Figure 7-3: Locating Service Laterals
Figure 7-4: Locating a Bend
Figure 7-5: Locating a Dead End
7.8 Common Bonded Utilities -
Telephone, power, and CATV sometimes use a common
ground bond. If other utilities are connected to your target utility, putting a signal on the target can
cause all the utilities to carry the same signal, making it difficult to identify the target utility.
To verify that you are tracing the targeted utilities, note the field strength at a known location of
the utility. As you trace, any change in field strength should be gradual. If either reading changes
abruptly you are probably no longer over your targeted utility.
NOTE:
This method will work only if there is no cross bonding on the length of the utility between
