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OM-2221 Page 26
4-2. Using Multiple Units: DC Lead Arc, One or More AC Trailing
! Turn Off welding power source and dis-
connect input power before opening
access door.
! High weld output current hazard! Re-
move all metal jewelry, such as rings
and watches, and be careful with tools
near output terminals. High current can
cause severe burns from hot metal if
touched to output terminals and unit is
On. ALWAYS turn Off welding power
sources and disconnect input power
BEFORE making weld output connec-
tions.
! Electric shock can kill.
Do not touch live electrical parts.
Turn off welding power sources and disconnect
input power before making any weld output
connections.
See ANSI Z49.1 and OSHA Title 29, Chapter
XVII, Part 1910, Subpart Q (addresses at be-
ginning of manual).
Do not handle or come in contact with two live
electrodes at the same time.
! Undersized weld cables can cause fire.
Work cable or electrode cable must be able to
carry the weld output of the individual welding
power source (see Section 3-8).
Do not exceed duty cycle of welding power
sources.
! If there are any questions regarding this
procedure, contact the factory before
connecting units.
To use a DC electrode positive lead arc with
one or more trailing AC arcs, make connec-
tions as shown.
When running more than one AC trailing arc,
set up the AC units according to Section 4-4.
To
DC Output Electrode #1
DC Output Unit
Connections
First AC Output Unit
Connections
To AC
Output
Electrode #3
To AC
Output
Electrode #2
801 882-A
Shielded Cable To
Terminal Strip TE4
To Next AC
Unit
Second AC Output Unit
(And Following Units)
Connections
To Work
To Work To Work