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ELECTRICAL SYSTEM
GROUND FAULT CIRCUIT INTERRUPTER (GFCI)
Many states require trailers which are sold in their state, and which have exterior 110
volt receptacles, to have a ground fault circuit interrupter.
Trailers manufactured for sale in these states have type THQL IS amp GFCI breakers
installed on the general circuit, since the exterior breaker is on this circuit. The breaker
replaced the standard TQL-15 amp breaker.
When properly installed, the GFCI circuit breaker provides reliable overload and short
circuit protection PLUS protection from Ground Faults that might result from contact
with a “HOT”’ load wire and ground.
IMPORTANT NOTE: The GFCI circuit breaker will NOT reduce shock hazard if contact is
made between a “HOT” load wire and a neutral wire or 2 “HOT” load wires.
Each GFCI circuit breaker is calibrated to trip with a ground current of 5 milliamperes
or more. Since most persons can feel as little as 2 milliamperes, a distinct shock may
be felt if the need for protection exists. However, the shock should be of such short
duration that the effects would be reduced to less than the normally dangerous level.
However, persons with acute heart problems or other conditions that can make a
person particularly susceptible to electric shock may still be seriously injured.
While the GFCI circuit breaker affords a high degree of protection, there is no substitute
for the knowledge that electricity can be dangerous when carelessly handled or used
without reasonable caution.
WARNING: The GFCI circuit breaker provides protection only to the
circuit to which it is connected. It does NOT provide protection to any other
circuit.
ON
TRIP
OF
F
PUSH
TO
TEST
Difference in
current
when ground
fault exists
Positive Buss Bar
Neutra
l
Buss Ba
r
Black-Hot Lead
White-Neutral to load