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|  MIL-J-7093A
(Weps)
Precautions. - Proper care should be exercised at all times to protect
6.7.1.6
personnel from accidents, fires or explosions, and to limit damage to equipment and
loading areas. In this connection the following precautionary measures should be
observed:
(a) Employ properly proportioned and properly located
protective barricades, screens or shields at all required points:
(b) Keep only minimum limited quantities of explosives and com-
pleted or partialIy loaded parts present at each stage of operation.
(c) Keep explosives and explosive parts in approved covered
receptacles with covers in place when material is not being taken out of or put into
the receptacles. Where necessary, receptacles should be conductive to ground
electrostatic charges.
(d) Protect operations from electrostatic charges by effectively
grounding all machinery, equipment, and fixtures; and, where necessary, employ
suitable grounded conductive coverings for floors, work benches and tables, and
workers' conductive shoes. Workers' clothing of a type to minimize the accumu-
lation of static charges should be employed. Fabrics such as silk, nylon and
plastics which promote static charge generation should be avoided. Additional
grounding devices such as grounded bracelets for workers should be employed
where operations are conducted with items which are unusually sensitive to ini-
tiation by static electricity. Such items include initiating explosives, tracer
mixtures, and low-energy type electric primers, detonators, and squibs. The
latter types of items should have the free ends of lead wires bared and twisted
together, and be packed in relatively small groups wrapped in bare non-insulated
aluminum foil or other uncoated metal foil. During assembly and processing
operations such sensitive electric items should be short circuited by clips or other
devices until installed with safety shunt in the final device. Additional precau-
tions for these items should include mechanical shielding to contain or deflect
fragments and blast, also electrical shielding of these items from induced electric
currents generated by sources such as lightning, static, radiations from communi-
cations apparatus, radar, or high frequency heating apparatus, etc. Where
necessary for safety, humidity (see par. 6.7.1.4) for work rooms should be increased,
as required to lessen electrostatic effects without excessive moisture absorption.
(e) Protect all explosive operations from effects of electric current
originating from equipment such as soldering irons, heaters, switches, wiring,
motors, lights, test instruments, etc., by suitable insulation, grounding, separation
or shielding. Such electric sources may initiate explosives by heat, sparks, arcs,
or due to completing an electric circuit through an electric primer, detonator, or
squib. Circuits may be inadvertently completed, for example, from a defective
electric soldering iron through a grounded contact. All electric type primers,
detonators or squibs provided with wire leads should have the free ends of the wires
bared and twisted together to short circuit each unit, except when in process of
assembly into a finished item. Where practicable, removable short circuiting clips,
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