Amprobe INSP-3 Wiring-Inspection-Tester - Manual (Page 14)

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the wiring resistance would limit the current to
approximately 424 Amps.
Line 5: shows that if the hot and ground
conductors were to be shorted at the outlet,
the wiring resistance would limit the current to
approximately 850 Amps.
NOTE: Unit turns on automatically when plugged
in. Push and release Power/Select push button to
toggle between screens.
What the Readings Mean
A) Voltage under load: This is the actual voltage
available if a steady load of 10, 15 or 20 amps is
applied to the line. Most North American devices
will operate correctly between approximately
110 and 125 volts. Voltage of less than 108 may
cause computers and other sensitive equipment
to malfunction. High or low voltage can often be
corrected by the utility company servicing your
area.
B) Voltage Drop: Indicates amount voltage would
be reduced with the set load applied to the line.
The national electrical code recommends no
more than a 5% voltage drop. Excessive voltage
drop can be caused by poor splices, connections
or too small of wiring for the length of the run.
Excessive voltage drop can lead to fire, low
operating voltages, and marginal operations
of equipment. Individual conductor quality is
tested by comparing the percentage of voltage
drop on the hot and neutral conductors. This
will indicate if either the hot or the neutral has a