TM 5-6115-593-34 NAVFAC P-8-631-34 TO-35C2-3-463-2 CHAPTER 17 GENERATOR SET INSTALLATION PRACTICES Section I.  SAFETY PRECAUTIONS 17-1 GENERAL. This chapter provides safety precautions, site selections guidelines, air, cooling, fuel, exhaust, electrical, and service requirements relevant to the  proper  installation  of  the  generator  set.    All  other input   requirements   not   covered   in   this   chapter   and required    by    the    user    are    the    responsibility    of    the cognizant installation manager. 17-2.      Do   not   use   a   lifting   device   with   a   marginal capacity   when   lifting   and   moving   the   generator   set. Observe  the  center  of  gravity  of  the  equipment  to  be lifted and do not allow the generator set to swing while it is suspended.  Make certain the structure to support the generator set is strong enough to support the weight of the  set.    Failure  to  observe  this  warning  may  result  in serious injury or death to personnel. 17-3.  The voltage produced by generators is dangerous to   personnel   coming   in   contact   with   any   part   of   the electrical   system   during   operation.      Severe,   possible fatal  shock  may  result.    See  that  adequate  grounding provisions have been made and the generator sets are grounded    using    the    ground    studs    provided    before operation.          Be     extremely     careful     when     unit     or surrounding area is damp or wet. 17-4.  In case of an accident from electrical shock, shut down  the  set  at  once.    If  the  set  cannot  be  shut  down, free  the  victim  from  contact  with  a  nonconductor,  and avoid  direct  contact  with  victim.    Use  a  dry  rope,  dry board,   or   any   nonconducting   implement   to   free   the victim.      If   the   victim   is   unconscious,   apply   artificial respiration and get medical help. 17-5.  When servicing any part of the electrical system or  making  any  connections,  be  sure  the  maintenance switch is in the MAINTENANCE position and padlocked. Clean or service the generator set only when the engine is shut down. 17-6.      If   the   unit   stops   by   operation   of   the   safety devices, do not attempt to operate it until the cause has been eliminate. 17-7.    When  filling  the  fuel  tank,  do  not  smoke  or  use open  flame  in  the  vicinity.    Be  extremely  careful  when using   a   carbon   tetrachloride   fire   extinguisher   in   an enclosed  area.    A  poisonous  gas  is  generated  by  the contact   of   carbon   tetrachloride   with   heated   surfaces. Provide adequate ventilation before entering an enclosed   area   where   carbon   tetrachloride   has   been used. 17-8.    When  operating  in  an  enclosed  area,  pipe  the engine  exhaust  outside.    Be  sure  to  increase  the  pipe diameter   and   use   a   minimum   amount   of   bends   and elbows  to  prevent  back  pressure  in  the  engine  exhaust system.  Be sure the enclosure has proper ventilation to accommodate the engine cooling system. 17-9.  When servicing batteries, do not smoke or use an open flame in the vicinity.  Batteries generate explosive gas during charging. 7-10.  DANGER signs must be placed in the vicinity of the  engine.    There  is  to  be  no  smoking  in  the  vicinity. No  work  is  to  be  performed  on  the  engine  involving open     flames,     such     as     cutting,     welding,     grinding, chiseling,  or  any  similar  operation  which  may  produce sparks. 17-11.      A   fire   extinguisher   (dry   powder   or   carbon dioxide,  CO₂)  must  be  placed  next  to  the  mechanic's working area, handy for immediate use. 17-12.  Pay particular attention that all generator output phase  leads  are  properly  insulated  before  starting  set. Neglect  to  do  this  may  result  in  extensive  damage  to equipment and personnel injury.  This condition is most prevalent when set is started before electrical installation is completed. CAUTION For  proper  unit  operation,  battery minus (-) terminal must be connected to ground. 17-1