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|  MIL-E-19141D
Percentage of mean
dimension
Electrode size (inch)
7
3/32 and smaller
5
1/8 and larger
3.2.3 Dielectric strength. The coverings of MIL-I-A2a electrodes at room
temperature and in the dry condition, that is, as removed from freshly opened
containers, shall have a dielectric strength sufficient to insulate effectively
against a difference potential of 110 volts (V), 60 hertz (Hz), alternating
current (a.c.)c The coverings of MIL-I-A2c electrodes are electrically conduc-
tive. This electrode type is acceptable under this specification provided the
packages are labeled as specified in 5.3.1.1.
3.2.4 Flaking and cracking of covering. The sum of the surface area of
the core wire exposed by flaking and cracking of the covering shall not exceed
that permitted for arc ends specified in 3.2.8.1, when subjected to the test of
4.4.4.
3.2.5 Slag removal. The slags deposited by the coverings shall be readily
removable with hand tools rather than air or power operated tools.
3.2.6 Stability. The stability of the coverings shall be such that elec-
trodes, after receipt from the manufacturer, will comply with this specification
after storage in original unopened containers under roof and on dry platforms
for the following periods:
Time period
Type of unit container
Up to 6 months
Class 5 of MIL-W-1043O
Up to 1 year
Classes 1 and 2 of MIL-W-1043O
3.2.7 Extent of coverings.
3.2.7.1 Arc ends. The arc end of each electrode shall be sufficiently
bare and the covering tapered a minimum amount to permit striking of the elec-
trode. The core wire shall not protrude more than 1/32 inch beyond the cover-
ing at the arc end. Chipping of the covering at the arc end may accidentally
occur, but when it does occur, such chipping shall not exceed one-quarter the
circumference of the core wire and one-quarter of the circumference of the
core wire transverse to the arc end.
The grip ends shall be bare within the limits speci-
3.2.7.2 Grip ends.
fied on figure 1.
3.2.8 Electrode identification.
3.2.8.1 Marking. At least one legible electrode type designation or
classification number shall be applied to the electrode covering in such a
manner that at least one complete type designation shall come within the space
2-1/2 inches from the grip end of the electrode.
4
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