Connect Blasting Machine to Firing Circuit. Connect the blasting machine to the firing circuit using the
steps that follow.
Warning. Do not connect the blasting machine to the firing wire until all prefiring tests have been completed and
a signal is received from the supervisor that the area has been cleared of all personnel and equipment.
Before connecting the blasting machine, make sure that all blasting caps are included in the firing circuit; that
all connections between the blasting cap wires, connecting wires, and firing wire are properly made; and that
the number of blasting caps in any circuit does not exceed the rated capacity of the blasting machine being
Connect the blasting machine to the firing circuit by fastening the ends of the firing wire to the two terminals
of the blasting machine.
Nonelectric Firing System
The nonelectric firing system is used when full control of the shot is not required. When the electric firing system
is not feasible, the nonelectric firing system will be used. Unlike the electric firing system, it can be used in all
weather conditions and is not affected by EMR hazards or radio/radar transmissions.
Like the electric firing system, the nonelectric firing system must also be dual primed. The nonelectric firing
system consists of the fuse igniter, time blasting fuse, and the nonelectric blasting cap. See Figure 27. The
nonelectric explosive initiating demolition equipment set is shown in Figure 28, Page 22. There are four steps in
assembling the nonelectric firing system.
Figure 27. Nonelectric firing system.