Common Work Connections - Miller CST 280 Rack Owner's Manual

3-6. Common Work Connections

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5
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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 ARCING can burn skin or damage
electrical equipment. Do not change
position of the welding
connectors while welding.
Y Be sure the connectors are secure in
receptacles before welding.
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5
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Y INADEQUATE
CONNECTIONS can cause serious
damage to input power service and
create a hazardous
Connect an electrical cable of
adequate size between the isolated
terminal and
whenever the isolated terminal is
used.
Electrode Positive Connection:
1 Positive (+) Weld Output Cables
Determine cable
according to welding power source Owner's
Manual.
2 Isolated Terminal
cable
3 Negative (−) Weld Output Cables
Determine cable sizes according to welding
power source Owner's Manual. Cable must
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WORK CABLE reach from negative (−) output receptacle to
isolated terminal.
4 Common Negative (−) Weld Output
condition.
Cable
Cable must be able to carry combined weld
the workpiece output of all welding power sources using
common work connections. Use Section 3-5
to select proper cable size.
5 Terminal Lugs
Use lugs of proper amperage capacity and
hole size for connecting to isolated terminal.
lengths and sizes
Isolated terminal is 1/2 in (12.7 mm) in
diameter.
For Electrode Negative, reverse cable
connections. Positive (+) weld output cables
connect to isolated terminal, negative (−)
weld output cables go to electrode. Common
weld output cable is positive.
Ref. 801 700 / Ref. 803 170-A
OM-221 611 Page 13