Thor Motor Coach CLASS B, Owner'S Manual

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E L E C T R I C A L S Y S T E M
T H O R M O T O R C O A C H | M A D E T O F I T
Your motorhome is furnished with ground fault circuit inter-
ruption (GFCI) protection on specific 120 volt AC receptacles
(recepts). GFCI recepts are found in the bath, while recepts in
the kitchen area and exterior may be electrically connected to
this circuit; therefore, also GFCI protected.
The GFCI does not protect against short circuits or electrical
overloads. Circuit breakers in the Power Load Center, which
supply power to the circuit, will trip if these conditions exist.
GFCI recepts are compliant to the self-test industry standards
implemented in 2015. These new GFCI’s automatically mon-
itor the presence of ground, and if a ground fault is present,
whether a load is plugged in or not, the GFCI shuts off power
to the recept. Although the self-testing feature increases the
safety of the recept, it does not eliminate the need for occa-
sional manual testing of the GFCI circuit breaker to ensure it
is working properly. Manually test GFCIs at the beginning of
the travel season and monthly thereafter.
TO TEST THE GFCI CIRCUIT BREAKER:
1. Make sure power is switched ON to the circuit. Use a test
meter, test probe or a low-wattage electrical device.
2. PUSH the test button. The RESET button should pop out.
3. With the RESET button out, all power should be inter-
rupted (OFF) to the recept being tested.
4. Verify there is no voltage to the recept by using the test
probe or low-wattage electrical device.
5. Push the RESET button IN to restore power to the GFCI.
6. Verify that voltage has been restored to the GFCI recept.
If the reset button does not pop out after pushing the test but-
ton, or GFCI circuit breaker continues to trip, or if the power
is not interrupted to the test light, immediately turn OFF
power at the main circuit breaker panel and have a qualified
electrician repair the circuit or replace the GFCI. Do not use
that circuit until repairs are made.
If a non-GFCI recept is ‘dead’, check the near-by GFCI
circuit breaker; it may need to be reset. If so, unplug all elec-
trical devices from the GFCI recept and all recepts wired to
this circuit, and reset it. Then, monitor it for proper circuit
functionality.
GFCI Receptacle If resetting the GFCI does not restore power to it and to the
other GFCI-protected recepts
and
the corresponding circuit
breaker in the Power Load Center is
not
tripped, then there is
a problem with the electrical circuit or GFCI recept. Enlist the
service of a qualified electrical technician for repairs. Do not
use that circuit until repairs are made.
NOTE: It is normal RV wiring practice to wire one
or more electrical receptacles to the GFCI circuit. If
another outlet in the motorhome is ‘dead’ check the
GFCI in the bathroom; it may be tripped.
Outside 120 Volt AC Receptacle
If the GFCI fails EITHER the self-test or manual test,
turn OFF power to the failed circuit at the Power Load
Center. Do not restore power to the faulty circuit until
proper repairs have been made.
WARNING WARNING
NEVER USE AN APPLIANCE OR ELECTRICAL DEVICE
THAT IS NOT PROPERLY GROUNDED OR HAS A
MISSING OR DEFEATED GROUND PIN. INJURY OR
DEATH DUE TO ELECTROCUTION IS POSSIBLE.
WARNING WARNING
Your motorhome is equipped with a convenient outside 120
volt AC power receptacle that is useful for operating appliances
and entertainment devices. For your safety, the outside recep-
tacle is grounded and ground-fault protected (Ground Fault
Circuit Interruption, or GCFI).
POWERING THE OUTSIDE RECEPTACLE:
The outside 120 volt AC power receptacle is energized
whenever the motorhome is connected to shore power or the
on-board generator is running. In typical RV wiring fashion,
this receptacle is wired to a circuit that is ground-fault protect-
ed and likely includes other receptacles; usually located in the
bathroom and kitchen; areas where the likely-hood of water is
present. Refer to your motorhome’s 120 volt wiring diagram
to locate other receptacles on the GFCI circuit.