Lincoln Electric LN-25 Service Manual page 17

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arc voltage of at least 17V would be required to obtain
the 400 in/min. wire feed speed.
WORK CLIP LEAD
WARNING
ELECTRIC SHOCK can kill.
• Do not touch metal portions
of the LN-25 lead clip when
welding power source is on.
WARNING
IMPORTANT SAFETY NOTE: To avoid possible
electrical shock, do not touch the metal portions of
the LN-25 work lead clip if the power source output is
on. The clip will be electrically "HOT" to work if the
input electrode cable to the LN-25 is electrically "HOT"
even if the gun trigger is off and even if an internal
contactor is used. Care should be taken to only handle
the LN-25 work clip by its non-metal insulated portions
and/or the welding power source should be turned off
before handling the work clip.
The 15 ft work clip lead attached to the front panel of
the LN-25 case must be connected directly to the work
using the spring clip on the end of the lead.
If not connected, the LN-25 will not operate even if a
K431-1 or K624-1 (42V) Remote Output Control
option (refer to Accessories Section) is used.
However, the electrode will still be electrically "HOT"
when the clip lead is disconnected, if K431-1 or K624-
1 (42V) Remote Output Control Option, or Internal
Contactor (K443-1), is not used.
NOTE: The clip lead also serves as a work sensing
lead for the LN-25 Voltmeter. If the clip lead is
extended by the user beyond the standard 15 ft.
length, the voltmeter reading will be lower than the
actual arc volts due to the LN-25 motor control cur-
rent flowing through the resistance of the extended
lead. To minimize this voltmeter error, the following
minimum lead size is recommended for the maximum
extended lengths shown:
OPERATION
AWG
REMOTE ARC VOLTAGE CONTROL (OPTIONAL)
This rheostat control allows you to control the power
source output arc voltage level. Refer to K444, K444-1
and K444-2 Remote Voltage Kits in the Accessories
section.
GAS FITTING (OPTIONAL)
Provides gas output connection to the welding gun for
the GMAW process. Refer to K430-1 Gas Solenoid Kit
in the Accessories Section.
GAS POST PRE-FLOW TIMERS (OPTIONAL)
Allows for variable adjustment of gas pre-flow & post-
flow at the start and end of the weld. Refer to K434-
1 Gas Flow Timer Kit in Accessories Section.
LN-25
Maximum Length
#14 25 Ft
#12 50 Ft
#10 100 Ft
#6 200 Ft
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