Electrical Input Connections; Line Cord Connection - Lincoln Electric PRO 155 Operator's Manual

A-6

ELECTRICAL INPUT CONNECTIONS

FIGURE A.6
OPTIONAL GAS
SOLENOID INLET FITTING
230 VOLT INPUT CONNECTIONS
The PRO 155 is shipped from the factory connected
for 230 volt input power. If the welder has been
reconnected for 208 volt input power and 230 volt
input is desired, perform the following reconnection
instructions:
WARNING
Make certain that the input power is electrically
disconnected before removing the screws that
hold the case side in place.
1. Disconnect welder from input power and remove
case side panel.
2, Remove lead marked "H3" from CR1 on the control
P.C. Board.
3. Remvoe tape securing H1 lead to lead sleeving
and connect H1 to CR1.
4. Insulate unused H3 lead for 300 volts with electri-
cal tape and secure to lead sleeving.
5. Reinstall case side before connecting input power.
208 VOLT INPUT CONNECTION
To connect the PRO 155 for 208 volt input power, per-
form the following reconnect instructions (which are
INSTALLATION
also included on the wiring diagram located on the
inside of the case side panel):
1. Disconnect welder from input power and remove
case side.
2. Remove lead marked "H1" from CR1 on the control
P.C. Board.
3. Remvoe tape securing H3 to lead sleeving and
connect H3 to CR1.
4. Insulate unused H1 lead for 300V with electrical
POWER INPUT
tape and secure to lead sleeving.
CABLE
5. Reinstall case side before connecting input power.

LINE CORD CONNECTION

This welding machine must be connected to
power source in accordance with applicable elec-
trical codes.
The United States National Electrical Code (Article
630-B, 1990 Edition) provides standards for
amperage handling capability of supply conduc-
tors based on duty cycle of the welding source.
If there is any question about the installation
meeting applicable electrical code requirements,
consult a qualified electrician.
A 12/3 AWG (3.3 mm
amp, 250 volt, three-prong plug (NEMA Type 6-50P)
is factory installed. Connect this plug to a mating
grounded receptacle which is connected to an appro-
priate power supply per the U.S. National Electric
Code and any applicable local codes. Refer to
"Technical Specifications" for proper fuse and supply
conductor sizes.
PRO 155
WARNING
2
) 3 conductor line cord with a 50
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.
A-6