Amprobe INSP-3 Manual De Uso página 15

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
loose connection or if the wiring run is too long
or has too small a gauge wire for the length of
the run. The electrical code states that ". . . where
the maximum voltage drop on both feeders
and branch circuits to the farthest outlet does
not exceed 5 percent, will provide reasonably
efficiency of operation" (Sec. 210-19)
Possible problems creating excessive voltage drop:
a) Bad splice
b) Loose screw termination
c) Stripped thread on wire nuts or terminal screws
d) Faulty outlet
e) Undersize wiring (too long of run for wire size)
f) Loose connection at circuit breaker or fuse
g) Corroded connections
h) Overheating due to loose contacts
i) Faulty or poor quality push in connections on
receptacles
j) Cold forming on aluminum wiring, causing
loose connections
k) Worn switch or circuit breaker contacts.
NOTE: 15 amp systems should not be expected to
perform to 20 amp specifications
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