THOR CLASS A Owner'S Manual Download

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E L E C T R I C A L S Y S T E M

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Typical GFCI receptacle

For the safety of you and your passengers, all ground

faults must be repaired before using your motorhome.

WARNING

The 12 volts DC fuse panel label

indicates fuse sizes, positions, and

the electrical components powered

through the 12 volt circuits. At

the beginning of camping season,

inspect all the 12 volt fuses and

replace them as needed. Before

replacing a fuse always shut OFF the

engine, generator, and all motor-

home electrical systems completely,

including making sure the electrical

components listed on the fuse label

are in the OFF position:
1.  Shut OFF the chassis engine.
2.  Disconnect the shore line power cord.
3.  Shut the generator OFF (if equipped).
4.  Turn the inverter OFF (if equipped).
5.  Turn OFF the Master Battery Disconnect Switch and dis-

connect the auxiliary battery main negative battery cable.

6. Remove the fuse panel cover.
7. Make sure the electrical component located on the

fuse label is turned OFF.

8. Pull the fuse straight out of the fuse block. If inspection

of the fuse confirms that it is not blown, some other

electrical problem may exist.

9. Insert a new fuse of the same specified voltage, amper-

age rating, and type in the original location. Never use

a higher rated replacement fuse.

The fuse panel label should be kept permanently affixed to

your motorhome. The fuses will not offer complete protec-

tion of the motorhome electrical system in the event of a

power surge or spike. Fuses are maintenance components

and must be replaced as needed. Please contact your selling

dealer’s Service Department for further repair assistance.

NOTE: Refer to the Chassis Packet for information
regarding the chassis fuses and circuit breakers.

Ground Fault Circuit Interrupter
(GFCI)

The ground fault circuit inter-

rupter (GFCI) receptacle is

designed to reduce possible

injury caused by electric shock.

The GFCI receptacle(s) will not

protect against short circuits or

circuit overloads.

Inspection

Test all GFCI receptacles monthly:

1. Make sure the circuit breaker

is in the ON position (it must

be connected to 120 volt

power to reset the GFCI, as

needed).

2. Push in the GFCI TEST button. The GFCI RESET

button should pop out indicating the GFCI recepta-

cle has been 'tripped' and the 120 volts AC power is

interrupted.

3. Confirm that 120 volt AC is not present at the recepta-

cle by measuring voltage with a test meter or plugging

in a 120 volt device to determine if the receptacle is

OFF.

4. Then push in the GFCI RESET button to restore 120

volts AC power.

Contact your selling dealer’s service department for repair

assistance if the GFCI RESET button does not restore 120

volt power when it pops back out.

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.

Typical ATC blade-
type fuse

Replacement fuses must be of the same voltage,

amperage rating, and type. Never use a higher rated

replacement fuse as it may cause a fire by overheating

your motorhome’s wiring.

WARNING

Fuses