TM 1-1500-204-23-5 (c) Substantial low resistance conductors   shall   be   used   to   ground   all   stationary   and portable  machines,  equipment,  or  other  devices  in  which static    charges    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   dear   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 shall 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   extinguishers   for class of fire as follows:   Class A fire (wood, paper, trash, etc.).  Use water or soda-acid fire extinguisher.    Class  B  fire  (oil,  paint,  fuel,  grease,  etc.).    Use bromotrifluoromethane    or    carbon    dioxide    fire extinguisher.    Class    C    fire    (electrical    equipment).        Use bromotrifluoromethane    or    carbon    dioxide    fire extinguisher.    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. d.   Shop  Tools  And  Materials.    Handling  tools  and materials   require   observance   of   the   following   common safety practices: (1)    Do    not    leave    tools    or    objects    in    elevated positions from which they can fall or be knocked off. (2) Do not point a compressed airstream toward any part of the body. (3)  All  unserviceable  tools  shall  be  plainly  marked and removed from service. (4) Electrical cables and air hoses to portable units shall be laid out so there is no danger of tripping. (5)   Electrical   tools   shall   be   connected   to   a   low resistance ground. (6)   Keep   bench   tops   covered   with   material   hard enough  to  prevent  chips  and  other  foreign  material  from becoming  imbedded.    Keep  bench  tops  clean  and  free from chips and filings. Change 2     2-2