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Using the 240V – 120V Adapter Cord
If a 240V (50A) circuit is not available, you can connect your Forney 180 ST+ welder to 20A outlet (with a 30A breaker)
using the adapter cord. When using the adapter cord for 120V, use lower power settings on the machine to avoid
frequent circuit breaker trips. At maximum settings on 120V, the machine will draw more than 20A regularly.
240V/50A
120V/20A
• Do not lay material or tools on the INPUT POWER CABLE. The INPUT POWER CABLE may be damaged and
result in electrical shock.
• Keep the INPUT POWER CABLE away from heat sources, oils, solvents or sharp edges.
• Do not use this welder on a circuit with a Ground Fault Circuit Interrupter (GFCI) on it. GFCIs are tripped by
welding arcs and your welding operations will be interrupted regularly.
Generators
This welder can be operated from an AC generator. Ensure that the generator can supply a minimum of 4,000
watts (120V operation) or 10,500 watts (for 240V operation) of continuous output. The generator must not have
an auto-idle fuel saving feature or must have the option to turn auto-idle off. The generator must always run at
full speed while your welder is plugged into it or you risk damaging your welder. Any other power draws on the
generator or anything that reduces the generator RPM may damage your welder. Total Harmonic Distortion (THD) of
the generator cannot exceed 5% THD or damage to your welder is likely.
Extension Cords
For optimum welder performance, an extension cord should not be used unless absolutely necessary. If necessary,
care must be taken in selecting an extension cord appropriate for use with your specific welder.
Select a properly grounded extension cord that will mate directly with the AC power source receptacle and the
welder INPUT POWER CABLE (13) only use the included adapter between the welder’s INPUT POWER CABLE (13)
and the extension cord. Make certain that the extension cord is properly wired and in good electrical condition.
Extension cords must fit the following wire size guidelines:
•
Use #12 AWG or larger wire
•
Do not use an extension cord over 25 ft. in length.
Since the inhalation of welding fumes can be harmful, ensure that the welding area is effectively ventilated. See the
“Safety Summary” for more details (pages 5-9).
FOR YOUR SAFETY, BEFORE CONNECTING THE POWER SOURCE TO THE LINE
CLOSELY FOLLOW THESE INSTRUCTIONS:
• An adequate two-pole breaker must be inserted before the main outlet. This breaker must be equipped with
time-delay fuses.
• When working in a confined space, the welder must be kept outside the welding area and the ground cable
should be fixed to the workpiece. Never work in a damp or wet confined space.
• Do not use damaged INPUT POWER CABLE (13) or welding cables.
• The welding torch/electrode should never be pointed at the operator or other people.
• The welder must never be operated without its panels attached. This could cause serious injury to the operator
and could damage the equipment.
Ventilation
Additional Warnings
