Output Polarity Connections; Gun And Cable Installation - Lincoln Electric IDEALARC SP-255 Operator's Manual

The 230/460/575 volt 60 Hz model is not equipped
with a plug, input cable or receptacle.
4. Using the following instructions have a qualified
electrician connect the receptacle or cable to the
input power lines and the system ground per the
U.S. National Electrical Code and any applicable
local codes. See the "Technical Specifications"
page at the beginning of this chapter for proper
wire sizes. For long runs over 100 feet (30 m), larg-
er copper wires should be used. Fuse the two hot
lines with super lag type fuses as shown in the fol-
lowing diagram. The center contact in the recepta-
cle is for the grounding connection. A green wire in
the input cable connects this contact to the frame
of the welder.
This ensures proper grounding of the welder frame
when the welder plug is inserted into the
receptacle.
SINGLE PHASE INPUT SUPPLY RECONNECT DIAGRAM FOR 230/460/575 60 HZ MACHINES
TURN THE INPUT POWER OFF AT THE DISCONNECT SWITCH BEFORE INSTALLING
WARNING
OR SERVICING THIS MACHINE.
DO NOT TOUCH ELECTRICALLY "HOT" PARTS SUCH AS OUTPUT TERMINALS
OR INTERNAL WINDINGS.
GROUNDING SCREW MUST BE CONNECTED TO A GOOD EARTH GROUND PER
NATIONAL ELECTRICAL CODE.
DO NOT OPERATE WITH COVERS REMOVED.
HIGH VOLTAGE
ONLY QUALIFIED PERSONNEL SHOULD INSTALL OR SERVICE THIS EQUIPMENT.
can kill
1. ALL MACHINES ARE SHIPPED FROM THE FACTORY CONNECTED FOR THE HIGHEST NAMEPLATED SINGLE PHASE
INPUT VOLTAGE. TO CHANGE CONNECTIONS FOR A DIFFERENT INPUT VOLTAGE. RECONNECT BOTH COPPER
JUMPERS PER DIAGRAM BELOW. ALWAYS CONNECT JUMPERS BETWEEN OUTER STEEL NUT AND
INNER BRASS NUT ON TERMINAL STUDS.
2. CONNECT THE INPUT POWER TO THE INPUT TERMINAL BLOCK, L1 AND L2 AT THE UPPER LEFT CORNER OF
THE PANEL. TORQUE TO 16 IN-LBS.
3. CONNECT A GROUNDING LEAD TO THE GROUND STUD
SINGLE PHASE
230V / 60HZ.
VOLTAGE
L1
L1 L2 5
JUMPER
2
4
CONNECTION
1
3
DIAGRAMS
TO GROUND PER NATIONAL ELECTRICAL CODE
SINGLE PHASE INPUT POWER SUPPLY LINES
CONNECT TO A SYSTEM GROUND-
ING WIRE. SEE THE UNITED STATES
NATIONAL. ELECTRICAL CODE
AND/OR LOCAL CODES FOR OTHER
DETAILS AND MEANS FOR PROPER
GROUNDING.
CONNECT TO HOT WIRES OF A
THREE-WIRE, SINGLE PHASE SYS-
TEM OR TO ONE PHASE OF A TWO
OR THREE PHASE SYSTEM.
INSTALLATION
ON THE MACHINE NEAR THE INPUT TERMINAL BLOCK.
460V. / 60HZ.
575V. / 60HZ.
L1
L2 L2
5
5
2
4
2
4
1
1 3
3
BOTH
JUMPERS
S21531-1
OUTPUT POLARITY CONNECTION
WARNING
Turn the welder power switch off before changing
output connection.
The welder, as shipped from the factory, is connected
for electrode positive (+) polarity. This is the normal
polarity for GMA welding.
If negative (–) polarity is required, interchange the
connections of the two cables located in the wire drive
compartment near the front panel. The electrode
cable, which is attached to the wire drive, is to be con-
nected to the negative (–) labeled terminal and the
work lead, which is attached to the work clamp, is to
be connected to the positive (+) labeled terminal.

GUN AND CABLE INSTALLATION

The Magnum™ 250SP gun and cable provided with
the SP-255 is factory installed with a liner for .035-
.045" (0.9-1.2 mm) electrode and an .035" (0.9 mm)
contact tip. Install the .045 tip (also provided) if this
wire size is being used. For other wire sizes, see Gun
and Cable Maintenance.
WARNING
Turn the welder power switch off before installing
gun and cable.
1. Lay the cable out straight.
2. Make sure all pins on the gun cable connector are
aligned with the proper mating sockets on the front
panel gun connector and then join the connectors
and tighten the hand nut on the gun cable connec-
tor.
NOTE: If a gun and cable other than the Magnum
250SP is to be used, it must conform to standard
European-style connector (Magnum Fast-Mate™)
specifications. See diagram below.
A-3
IDEALARC SP-255