Lincoln Electric IM10047 RED-D-ARC GX300 - Manual (Page 13)

A-5 INSTALLATION A-5
An incorrect spark arrestor may lead to damage to
the engine or adversely affect performance.
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HIGH FREQUENCY GENERATORS FOR
TIG APPLICATIONS
The K930-2 TIG Module is suitable for use with the
GX 300. The GX 300 and any high frequency generat-
ing equipment must be properly grounded. See the
K930-2 Operating Manual for completed instructions
on installation, operation, and maintenance.
REMOTE CONTROL
The GX 300 is equipped with a 3 pin and a 14 pin
connector.
When in the CC-STICK, PIPE, and CV-WIRE modes
and when a remote control is connected to the auto-
sensing circuit in the GX 300 automatically switches
the OUTPUT control from control at the welder to
remote control.
The 14 pin connector is used to directly connect a
wire feeder or TIG Module (K930-2) control cable. In
the CV-WIRE mode, the GX 300 auto-sensing circuit
automatically makes the GX 300 Output Control inac-
tive and the wire feeder voltage control active when
the control cable is connected to the 14 pin connector.
NOTE: When a wire feeder with a built in welding volt-
age control is connected to the 14 pin connector, do
not connect anything to the other connector.
ELECTRICAL CONNECTIONS
MACHINE GROUNDING
Because this portable engine driven welder creates its
own power, it is not necessary to connect its frame to
an earth ground, unless the machine is connected to
premises wiring (home, shop, etc.)
To prevent dangerous electric shock, other equipment
to which this engine driven welder supplies power
must:
• Be grounded to the frame of the welder using a
grounded type plug.
• Be double insulated.
• Do not ground the machine to a pipe that carries
explosive or combustible material.
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When this welder is mounted on a truck or trailer, its
frame must be electrically bonded to the metal frame
of the vehicle. When this engine driven welder is con-
nected to premises wiring such as that in a home or
shop, its frame must be connected to the system earth
ground. See further connection instructions in the sec-
tion entitled "Standby Power Connections" as well as
the article on grounding in the latest U.S. National
Electrical Code and the local code.
In general, if the machine is to be grounded, it should
be connected with a #8 or larger copper wire to a solid
earth ground such as a metal water pipe going into
the ground for at least ten feet and having no insulat-
ed joints, or to the metal framework of a building
which has been effectively grounded.
The U.S. National Electrical Code lists a number of
alternate means of grounding electrical equipment. A
machine grounding stud marked with the symbol
is provided on the front of the welder.
WELDING TERMINALS
The GX 300 is equipped with a toggle switch for
selecting "hot" welding terminal when in the "WELD
TERMINALS ON" position or "cold" welding terminal
when in the "REMOTELY CONTROLLED" position.
WELDING OUTPUT CABLES
With the engine off connect the electrode and work
cables to the output studs. The welding process dic-
tates the polarity of the electrode cable. These con-
nections should be checked periodically and tightened
with a 3/4" wrench.
Table A.1 lists recommended cable sizes and lengths
for rated current and duty cycle. Length refers to the
distance from the welder to the work and back to the
welder. Cable diameters are increased for long cable
lengths to reduce voltage drops.
TABLE A-1
TOTAL COMBINED LENGTH OF
ELECTRODE AND WORK CABLES
Cable Length
0-100Ft. (0-30 meters)
100-150 Ft. (30-46 meters)
150-200 Ft. (46-61 meters)
Cable Size for
305 Amps
100% Duty Cycle
1 / 0 AWG
2 / 0 AWG
3 / 0 AWG
GX 300
WARNING
CAUTION