TM 1-1500-204-23-9 (b) Bolt down all machinery that can move or walk due to vibration (drill press, bench grinder, etc.) (c) Substantial     low     resistance     conductors shall    be    used    to    ground    all    stationary    and    portable machines,   equipment,   or   other   devices   in   which   static charge   may   be   generated,   or   which   require   electrical circuits of a hazardous nature. (d) Shop  machinery  shall  be  operated  only by qualified personnel observing safe practices. (e) Safety devices, such as guards, interlocks, automatic releases, and stops, shall always be kept in operating condition. (f) Ensure   that   all   unauthorized   personnel are   clear   of   area   before   opening   valves   or   energizing electrical circuits for starting machinery. (g) Suitable    mechanical    guards,    such    as enclosures  or  barricades,  shall  be  permanently  installed on   all   machinery   not   already   equipped   with   such   to eliminate danger of injury from moving parts. (h) Machinery shall not be adjusted, repaired, oiled, or cleaned while machine is in operation or power is on. (i) Personnel operating machinery shall wear protective clothing as prescribed.  A protective face shield or    goggles    shall    be    worn    when    operating    a    grinder regardless  of  whether  grinder  is  equipped  with  attached shields. (j) Jewelry shall not be worn while performing any maintenance. (2)    Fire    safety.        A    constant    vigilance    must    be maintained  to  seek  out  fire  hazards.    Fire  hazards  are constantly  present  in  the  shop  where  sparks,  friction,  or careless   handling   can   cause   an   explosion   that   may destroy    equipment    or    buildings,    and    injure    or    kill personnel.        Refer    to    AR    385-10,    The    Army    Safety Program  and  the  Occupational  Safety  and  Health  Act  of 1971.        The    following    fire    safety    practices    shall    be observed: (a) NO  SMOKING  signs  shall  be  placed  in areas where smoking could create a fire hazard. (b) Personnel   shall   be   trained   in   the   use, knowledge, and location of shop fire fighting equipment. (c) Each   shop   shall   be   equipped   with   fire extinguishers suited for type of fire most likely to occur. (d) Use correct fire extinguisher for class of fire as follows. * Class  A  fire  (wood,  paper,  trash,  etc).    Use water fire extinguisher. * Class   B   fire   (oil,   paint,   fuel,   grease,   etc). Use bromotrifluromethane, carbon dioxide or dry    chemical    extinguisher    with    Class    B rating. * Class   C   fire   (electrical   equipment).      Use bromotrifuoromethane, carbon dioxide or dry chemical extinguisher with Class C rating. * Class D fire (combustible metals- magnesium,    titanium,    zirconium,    sodium, lithium,   and   potassium).      Use   dry   powder type fire extinguisher. (e) Oily waste, rags, and similar combustible materials     shall     be     discarded     in     self-closing     metal containers which shall be emptied daily. (f) Flammable materials shall not be stored in the shop. (g) Use only approved cleaning solvents. 2-9.  Tool Boxes.  Tool boxes are used for storing tools. They are usually made of steel.  Portable tool boxes are used for carrying and storing a variety of hand tools.  Tool bags are usually made of canvas.  Like the boxes, they are available in a variety of sizes and serve similar functions.  Typical tool boxes are shown in figure 2-1. 2-3