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3-8. Paralleling Welding Power Sources For Air Carbon Arc (CAC-A)

Cutting And Gouging

Y Turn Off welding power sources by
placing fuse holders in the Off
position before making any weld
output connections.
Y Do not connect welding output of
different polarities to the same
structure.
Y See ANSI Z49.1 and OSHA Title 29,
Chapter XVII, Part 1910, Subpart Q
(addresses at beginning of manual).
Y Do not handle or come in contact with
two live electrodes at the same time.
Y UNDERSIZED WELDING CABLES
can cause fire. Use single cables of
adequate capacity to carry the total
combined amperage of the paralleled
welding power sources
Y ARCING can burn skin or damage
electrical equipment. Do not change
position
of
the
welding
connectors while welding.
OM-2238 Page 14
1
4
2
1
Securely cover
connection with proper
insulating material.
3
4
Y Be sure the connectors are secure in
receptacles before welding.
Y INADEQUATE
CONNECTIONS can cause serious
damage to input power service and
create
Connect an
adequate size between the isolated
terminal and the workpiece whenever
the isolated terminal is used.
Set the Amperage control on all
paralleled welding power sources to
the same value.
The isolated terminal may be used as a
common connection point if no other
connections are made to it.
cable
The procedure shown is for Electrode
Negative welding connections.
1
WORK
CABLE
a
hazardous
condition.
electrical
cable
of
Ref. 801 701 / Ref. 803 170
1
Weld Output Cables
Determine cable sizes according to welding
power source Owner's Manual. Cables must
reach cable connection point. Cables
connected together must be the same
polarity.
2
Connection Point
Cover with proper insulating material after
making connections.
3
Terminal Lugs
Use lugs of proper amperage capacity and
hole size for connection.
4
Common Weld Output Cable
Cable must be able to carry combined weld
output of all welding power sources
connected in parallel. Use Section 3-6 to
select proper cable size.
For Electrode Positive, reverse cable
connections. Positive (+) weld output cables
connect to electrode, Negative (−) weld
output cables go to Work.