5 2.5 1.25 .63 .5
8 3.6 1.8 .9 .72
10 4.25 2.13 1.07 .85
15 6. 3. 1.5 1.2
20 7. 3.5 1.75 1.4
30 9. 4.5 2.25 1.8
35 9.6 4.8 2.4 1.92
50 10. 5. 2.5 2

Remove the fuses from the wall switch and substitute fuses just large
enough to carry the "exciting" current. If no suitable fuses are at hand,
fine strands of copper from an ordinary lamp cord may be used. These
strands are usually No. 30 gauge wire and will fuse at about 10 amperes.
One or more strands should be used, depending on the amount of exciting
current, and are connected across the fuse clips in place of fuse wire.
Place a piece of wood or fibre between the welding dies in the welder as
though you were going to weld them. See that the regulator is on the
highest point and close the welder switch. If the secondary circuit is
badly grounded, current will flow through the ground, and the small fuses
or small strands of wire will burn out. This is an indication that both
sides of the secondary circuit are grounded or that a short circuit exists
in a primary coil. In either case the welder should not be operated until
the trouble is found and removed. If, however, the small fuses do not
"blow," remove same and replace the large fuses, then disconnect wires
running from the wall switch to the welder and substitute two pieces of
No. 8 or No. 6 insulated copper wire, after scraping off the insulation for
an inch or two at each end. Connect one wire from the switch to the frame
of welder; this will leave one loose end. Hold this a foot or so away from
the place where the insulation is cut off; then turn on the current and
strike the free end of this wire lightly against one of the copper dies,