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A-6
Line Cord Connection
A 3 conductor line cord with a 50 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 appropriate power supply
per the U.S. National Electric Code and any applicable
local codes.
Type 75°C
Wire in Conduit,
Input
Copper Cond.
Voltage
Hertz
AWG Size
208/230
60
WARNING
This welding machine must be connected to a
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.
INSTALLATION
Grounding
Wire
Fuse
Copper
Size
Cond.
(Super
AWG Size
Lag)
8
10
40
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.
ELECTRICAL INPUT CONNECTION FOR
RATED OUTPUT
230 Volt Input Connection
The SP-170T is shipped from the factory connected
for 230 volt input power. If the welder has been recon-
nected for 208 volt input power and 230 volt input is
desired, perform the following reconnection instruc-
tions:
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. Remove tape securing H1 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
1. Disconnect welder from input power and remove
case side.
2. Remove lead marked "H1" from CR1 on the control
P.C. Board.
3. Remove tape securing H3 to lead sleeving and
connect H3 to CR1.
4. Insulate unused H1 lead for 300V with electrical
tape and secure to lead sleeving.
5. Reinstall case side before connecting input power.
SP-170T
WARNING
ELECTRIC SHOCK can kill.
• Disconnect input power by
removing plug from receptacle
before working inside SP-170T.
• Use only grounded receptacle.
• Do not touch electrically "hot"
parts inside SP-170T.
• Have qualified personnel do the
maintenance and troubleshooting
work.
A-6
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