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 b. Grounds. Metal-cased portable tools shall be fitted with three-pronged plugs. Portable tools with
double insulated plastic cases are designed to be electrically safe without the use of a three-pronged
plug. A two conductor flexible cable and a two-pronged plug suitable for use with grounded type
receptacles may be used for all such equipment. Double-insulated tools with metal gearings and housings
with a two-pronged converter are also acceptable.
c. Fire Hazards. Portable electric tools with brushes (sparking) shall not be used where flammable
vapors; gases, liquids, or explosives are present.
d. Cord Care. Cords should not be allowed to kink, nor be left where they might be run over. Cords must
not encounter sharp edges, hot surfaces, oil, grease, water, or chemicals. A damaged cord shall be
replaced, not repaired. Patching cords with tape or any other substance is prohibited. Tools shall be
stored with cords loosely coiled.
e. Extension Cords. Only three-wire extension cords with three-pronged plugs and three-slot
receptacles shall be used. Because a metal hull ship is a hazardous location, personnel using a portable
electric device connected to an extension cord shall plug the device into the extension cord before the
extension cord is inserted into a live bulkhead receptacle. Likewise, the extension cord shall be
unplugged from the bulkhead receptacle before the device is unplugged from the extension cord.
a. Personnel. Only authorized and trained personnel shall operate pneumatic tools. Operators using
pneumatic tools shall wear and use necessary protective devices, including hearing protection. Personnel
with arthritis, neuritis, or circulatory disease shall be examined by a Medical Officer to determine if their
medical condition might be aggravated if they were to operate vibrating tools such as pneumatic
hammers, chisels, tampers, riveters, or corkers.
b. Inspection. Pneumatic tools shall be thoroughly inspected at regular intervals. These tools shall be
kept in good operating condition, and particular attention should be given to valves, hose connections,
guide clips on hammers and chucks of reamers and drills during the inspection. All pneumatic tools
should be labeled as hazardous noise sources.
c. Disconnection. Pressure shall be shut off and bled from the line before a pneumatic tool is
disconnected. The tools shall be fitted with a quick-disconnect fitting and, when the tool is not in use, it
shall be disconnected from its supply hose.
d. Air Hose. The air hose shall be rated for the pressure required for the tool. Leaking or defective
hoses shall be removed from service. Hoses shall be laid to avoid creating a tripping hazard, particularly
on ladders, steps, scaffolds, and walkways. Hoses that are run through doorways shall be protected
against damage caused by the door edge. An air hose shall never be pointed at any person.
e. Compressed Air. Compressed air shall not be used to clean clothing being worn, nor shall it be used
to blow dust off the body. Compressed air shall never be used as a power source for a projectile or to
clean the deck or space where the pneumatic tool was used.
a. Definition. A safety lock-off device is any operating control, which requires positive action by the
operator before the tool can be turned on. The lock-off device shall automatically lock the throttle in the
OFF position when the throttle is released. Two consecutive operations by the same hand shall be
required, first to disengage the lock-off device and then to turn on the throttle. The lock-off device shall be
integral with the tool, shall not adversely affect the safety or operating characteristics of the tool, and shall
not be easily removed. Devices such as a deadman control or quick-disconnect, which do not
automatically and positively lock the throttle in the OFF position when the throttle is released, are not
safety lock-off devices.
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