Gfci Receptacle Information, Resetting And Testing - Miller Big Blue 450 Duo CST Owner's Manual

7-3. GFCI Receptacle Information, Resetting And Testing

!
Use GFCI protection when operat-
ing auxiliary equipment. If unit does
not have GFCI receptacles, use
GFCI-protected extension cord. Do
not use GFCI receptacle to power
life support equipment.
!
Unplug power cord before attempt-
ing to service accessories or tools.
1 120 V 20 A AC GFCI Receptacles
2 GFCI Receptacle Test Button
3 GFCI Receptacle Reset Button
4 GFCI Indicator Light (LED)
Indicator light location may vary.
GFCI Receptacles
GFCI receptacles protect the user from
electric shock if a ground fault occurs in
equipment connected to the receptacle. A
ground fault occurs when electrical current
takes the shortest path to ground (which
could be through a person) rather than fol-
low its intended safe path.
The GFCI LED lights when a ground fault
occurs and blinks when the GFCI is not
functioning properly. If LED blinks, stop us-
ing receptacle and have it replaced by a
Factory Authorized Service Agent.
OM-247 969 Page 36
3
If a ground fault is detected, the GFCI Reset
button pops out, the LED lights, and the cir-
cuit opens to disconnect power to the faulty
equipment. A GFCI receptacle does not
protect against circuit overloads, short cir-
cuits, or shocks not related to ground faults.
Reset and test GFCI receptacle according
to the following procedure.
Resetting/Testing GFCI Receptacles
!
At least once a month, run engine at
weld/power speed and press Test
button to verify GFCI is working
properly. Do not perform GFCI re-
ceptacle test at idle speed or the
GFCI will be damaged and not
provide protection from electric
shock caused by a ground fault. If
LED blinks, stop using GFCI recept-
acle and have it replaced by a Fact-
ory Authorized Service Agent.
Resetting GFCI Receptacles
If a GFCI fault occurs, stop engine and dis-
connect equipment from GFCI recept-
acle(s). Check for damaged tools, cords,
1
2
4
plugs, etc. connected to the receptacle.
Start engine and connect equipment (light,
radio) so engine runs at weld/power speed.
Adjust front panel controls so full rated
voltage is available at GFCI receptacle(s).
Press GFCI reset button.
mentary protectors if necessary.
Testing GFCI Receptacles
GFCI testing must be done with engine run-
ning at weld/power speed. Start engine and
connect equipment (light, radio) to the
GFCI receptacle(s) so engine runs at weld/
power speed. Adjust front panel controls so
full rated voltage is present at GFCI recept-
acle(s).
Press the GFCI Test button. The connec-
ted equipment should turn off.
Press the GFCI Reset button. The equip-
ment should turn on.
If the equipment continues to operate when
the GFCI Test button is pressed, the GFCI
receptacle is not working properly. Stop us-
ing GFCI receptacle and have it replaced
by a Factory Authorized Service Agent.
RotGFCI1 2012−03
Reset supple-