So the SureTest’s indication of a “false”
ground may be either a good or a bad thing,
depending upon whether it has identified a
proper link at an AC power source or an
improper one at an AC appliance or a recep-
tacle. You’ll need to confirm or deny which is
the case by performing a little visual inspec-
tion detective work of all the devices men-
tioned, and physically tracking down the
neutral-to-ground link.Voltage Measurements
The second test in the sequence is the line
voltage measurement. Categorically, line volt-
age should be maintained at a maximum of
±10% of the rated voltage. For 120 V poten-
tial, voltage should be between 108 and 132
VAC; for 220 systems, the range is 198 to 242
VAC.50 electrical systems troubleshooting
Proper neutral-to-ground bonding of a 120 VAC generator, according to Standard E-11. (Courtesy ABYC).neutral-to-ground
link to caseA neutral-to-ground link on the back of a 120/240 V electric range——a
false ground. Another common appliance where this may occur is elec-
tric clothes dryers.