FORCING A TIME FUSE INTO A
BLASTING CAP BY TWISTING OR
OTHER MEANS MAY CAUSE CAP TO
EXPLODE. DO NOT FORCE TIME
FUSE INTO BLASTING CAP.
·F FUSE IS NOT IN CONTACT WITH
EXPLOSIVES IN THE CAP, A
MISFIRE MAY OCCUR.
· ONTACT BETWEEN CAP END OF
TIME FUSE AND MOIST FINGERS OR
CAUSE A MISFIRE.
g. Hold time blasting fuse vertically at
approximately arms length with square cut end up and
slip blasting cap gently down over it so that ignition
Figure 5-3. Lighting time blasting fuse with match.
charge in cap is in contact with end of time fuse; if not in
contact, it may misfire. If end is flattened or if it is too
large to enter blasting cap freely, recut fuse or roll time
fuse between thumb and fingers until size is reduced, to
FOREIGN MATTER IN A BLASTING
permit free entry.
CAP MAY CAUSE A MISFIRE. IF
FOREIGN MATTER IS TO BE
REMOVED FROM A NONELECTRIC
h. After blasting cap has been seated, grasp time
BLASTING CAP, DO NOT TAP CAP
blasting fuse between thumb, ring, and little finger of
WITH A HARD OBJECT OR AGAINST
less favored hand (left or right) and place forefinger
A HARD OBJECT. NEVER BLOW
over closed end of cap to hold it firmly against end of
DO NOT INSERT
time fuse. Keep a slight pressure on closed end of cap
with forefinger (C, fig. 5-2).
ANYTHING INTO CAP TO REMOVE
DIRT OR FOREIGN MATERIAL.
· RIMPERS ARE EQUIPPED WITH
f. Inspect nonelectric blasting cap by looking into
the open end. If any foreign matter or dirt is present,
CUTTING SECTION IS NOT USED
follow procedures below:
DURING CRIMPING OPERATION.
(1) Hold cap, near open end, between thumb
and middle finger, of one hand (fig. 5-2).
EXPLOSIVE IN BLASTING CAP MAY
(2) Aim open end of cap at palm of second
CRIMP CAP MORE THAN 1/4-INCH
FROM OPEN END.
(3) Gently bump wrist of one hand against
i. Place crimpers around cap just above thumb
wrist of other hand.
and third finger. Slide second (middle) finger down
outer edge of blasting cap to guide crimper (C, fig. 5-2),
(4) If foreign matter does not come out,
and thus obtain accurate crimping since finger can be
dispose of cap in accordance with local regulations.
used to locate open end of blasting cap.