Polarity Control And Cable Sizes - Lincoln Electric SA-250 PERKINS Operator's Manual

3. Proper placement of the equipment on the under-
carriage to ensure stability side to side and front to
back when being moved and when standing by
itself while being operated or serviced.
4. Typical conditions of use, i.e. travel speed, rough-
ness of surface on which the trailer will be operat-
ed, environmental conditions & likely maintenance.
5. Conformance with federal, state and local laws. (1)
(1) Consult applicable federal, state and local laws regarding specific
requirements for use on public highways.
Polarity Control & Cable Sizes
With the engine off, connect the electrode and work
cables of the appropriate size (see the following table)
to the studs located on the fuel tank mounting rail.
For Positive polarity, connect the electrode cable to
the terminal marked "Positive". For Negative polari-
ty, connect the electrode cable to the "Negative" stud.
These connections should be checked periodically
and tightened if necessary.
When welding at a considerable distance from the
welder, be sure you use ample size welding cables.
Recommended Copper Cable Sizes
250 Amps
@ 60% Duty Cycle
Up to 200 ft
1
200-250 ft
1/0
350 Amps
@ 25% Duty Cycle
2/0
3/0
–
11
–