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A-20
INSTALLATION
LN-7 & LN-7 GMA
A-20
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 and 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 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
FIGURE A.18 – GUN CABLE CONNECTIONS.
AMPHENOL
CONNECTOR
GUN CABLE
ASSEMBLY
CONDUCTOR
BLOCK
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.