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WORK CABLE
Connect a work lead of sufficient size and length (Table
A.2) between the proper output stud on the power
source and the work. Be sure the connection to the
work makes tight metal-to-metal electrical contact.
Poor work lead connections can result in the grounding
lead protector being activated.
TABLE A.2 – WORK LEAD SPECIFICATIONS
Copper Work Cable Size, AWG
Current 60% Up To 50 Ft 50 Ft-100 Ft
Duty Cycle (15.2 m
2
) (15.2-30.4 m
2
)
300 Amps 0 (53 mm
2
) 00 (67 mm
2
)
400 Amps 00 (67 mm
2
) 000 (85 mm
2
)
500 Amps 00 (67 mm
2
) 000 (85 mm
2
)
600 Amps 000 (85 mm
2
) 0000 (107 mm
2
)
GUN AND CABLE ASSEMBLIES
The LN-7 GMA can be used with several guns. In most
cases, Lincoln guns and cables are shipped
assembled, ready to weld. Use the gun and cable
assembly for the electrode type (solid, Outershield , or
Innershield) and electrode size to be used. Refer to the
Accessories Section for different gun types.
GUN CABLE CONNECTIONS
Lay the cable out straight. Insert the connector on the
welding conductor cable through the large hole in the
front panel of the LN-7 GMA and into the brass
conductor block on the front of the gearbox. Refer to
Figure A.18. Make sure it is all the way in and tighten
the hand wheel. Keep this connection clean and bright.
Connect the control cable amphenol plug into the
mating 5-cavity receptacle on the front of the control
section below the nameplate.
If using the K489-1 Fast-Mate Adapter, install per the
S19389 instructions included with the kit.
FIGURE A.18 – GUN CABLE CONNECTIONS.
AMPHENOL
CONNECTOR
GUN CABLE
ASSEMBLY
CONDUCTOR
BLOCK
INSTALLATION A-21
LN-7 GMA WIRE FEEDER