For dual voltage machines and figure a.2, Using the instructions in figure a.3 , have a qual, Installation – Lincoln Electric POWER MIG 255 SVM144-B User Manual
Page 11: Output polarity connections
POWER MIG 255
INSTALLATION
A-5
A-5
FIGURE A.3 — RECEPTACLE DIAGRAM.
CONNECT TO A SYSTEM
GROUNDING 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 SYSTEM OR TO ONE
PHASE OF A TWO OR
THREE PHASE SYSTEM.
OUTPUT POLARITY CONNECTIONS
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 con-
nection of the two cables located in the wire drive com-
partment near the front panel. The electrode cable,
which is attached to the wire drive, is to be connected
to the negative (–) labeled terminal. The work lead,
which is attached to the work clamp, is to be connect-
ed to the positive (+) labeled terminal.
FIGURE A.2 — TRIPLE VOLTAGE MACHINE INPUT CONNECTIONS.