TM 9-1375-213-12
NOTE
The machine is built to withstand all the
force that an operator can generate in
pushing plunger down.
2-5. Splicing Electric Wires
a. Stripping Wire.
(1) Strip about three inches of insulating
material from end of wire.
(2) Expose about three inches of bare wire
(3) Remove any foreign matter such as en-
amel by carefully scraping wire with back of a
knife blade or other suitable tool, Wires should
not be nicked, cut, or weakened when wires are
bared, and multiple-strand wires should be
twistid lightly after scraping.
c. Precautions for Splicing. A short circuit may
occur very easily at a splice if the following pre-
b. Splicing Method. Two wires, which have been
cautions are not observed.
prepared as described in a above, may be spliced
(1) If pairs of wires are spliced, stagger the
two separate splices and tie with twine or tape
Union pigtail splice.
(2) An alternate method of preventing a
short circuit at the point of splice is shown in (2),
figure 29. Splices are
separated, not
staggered, in
the alternate method.
(3) Whenever possible, insulate splices from
ground or other conductors by wrapping them
with friction tape or other electric insulating
tape, This is particularly necessary when splices
are placed in contact with wet ground.
(4) Circuit splices, not taped or insulated,
should not lie on moist ground. Splices should be
supported on rocks, blocks, or sticks so that only
insulated portions of wires touch ground. They
may also be protected by inserting them into card-
board cap spools, which may be bent to hold splice
firmly inside.
(5) To protect splices from damage by pull-
ing, tie ends in an overhand or square knot. allow-
ing sufficient length for each splice ((1 ), fig. 2-8).
a. Common Series. This is used for connecting
two or more charges fired electrically by a single
circuit is prepared by connecting one blasting cap
lead wire from first charge position to one lead
wire in second charge position and so on until
only two end wires are free, then connecting free
ends of cap lead wires to ends of firing wires.