effects  of  electric  shock:  First,  apply  several  layers of  approved  rubber  insulating  tape  on  the  metallic handle. Next, apply a layer or two of friction tape over the insulating tape, Friction tape when used alone does not provide adequate protection from electrical shock. It should be used only for griping purposes and to protect the insulating tape. For other  instructions  on  the  safe  use  of  handtools, consult   Tools  and  Their  Uses,  N A V P E R S 10085-B. Portable Electric Power Tools Portable electric power tools should be clean, properly  oiled,  and  in  good  repair.  Before  they are   used,   inspect   them   to   see   that   they   are properly grounded. The newer, double-insulated, plastic  framed  tools  do  NOT  have  ground  wires and  have  only  a  2-prong  plug. If  a  tool  is  equipped  with  a  3-prong  plug,  it should  be  plugged  into  a  3-hole  electrical receptacle. Never remove the third prong. Make absolutely  sure  the  tool  is  equipped  with  a properly  grounded  conductor.  If  the  tool  has  a metal  case,  be  sure  to  ground  it  according  to chapter 300 of  NSTM. Observe  safety  precautions and wear rubber gloves when plugging tools into any  110-volt  circuits  or  operating  any  portable electric equipment under particularly hazardous conditions.  Also  observe  safety  precautions  and wear rubber gloves in environments such as wet decks or bilge areas or when working over the side in  rafts  or  small  boats. Before  issue,  any  portable  electrical  equip- ment,    with   its   associated   extension   cords connected,  should  be  tested  for  resistance  from the  equipment  housing  to  the  ship’s  structure (the   resistance   must   be   less   than   1   ohm). Equipment  should  be  tested  with  an  approved tool   tester   or   plugged   into   a   dummy   (or deenergized)   receptacle   and   tested   with   an ohmmeter. The cable should be moved or worked with  a  bending  or  twisting  motion.  A  change in   resistance   will   indicate   broken   strands   in the  grounding  conductor.  If  this  is  found, the  cable  must  be  replaced.  At  the  discretion of   the   commanding   officer,   a   list   may   be established  of  portable  equipment  requiring testing  more  or  less  often  than  once  a  month. When  the  planned  maintenance  system  is installed,  tests  should  be  conducted  based  on the maintenance requirement cards. When using portable electric power took, you should  take  the  following  precautions: · Inspect  the  tool  cord  and  plug  before using  the  tool.  Do  NOT  use  the  tool  if  its  cord is  frayed  or  its  plug  is  damaged  or  broken.  Do NOT  use  spliced  cables  except  in  an  emergency that warrants the risk involved. · Before  using  the  tool,  lay  all  portable cables  so  that  you  and  others  cannot  trip  over them.  The  length  of  extension  cords  used  with portable  tools  should  not  exceed  25  feet.  Ex- tension  cords  up  to  100  feet  are  authorized  on flight  and  hangar  decks.  Extension  cords  up  to 100  feet  are  also  found  in  damage  control  lockers, but  are  labeled  for  Emergency  Use  Only. · Do not use jury-rigged extension cords that have metal “handy boxes” for receptacle ends of the  cord.  All  extension  cords  must  have  non- conductive  plugs  and  receptacle  housings. · Connect  the  tool  cord  into  the  extension cord   (when   required)   before   inserting   the extension  cord  into  a  live  receptacle. · After   using   the   tool,   first   unplug   the extension  cord  (if  any)  from  the  live  receptacle before  unplugging  the  tool  cord  from  the  exten- sion  cord.  Do  not  unplug  the  cords  by  yanking on  them. · Stow the tool in its assigned place after you are through using it. SUMMARY The Navy’s safety programs strive to maintain safe  and  healthy  working  environments.  The  keys to  successful  mishap  prevention  are  a  safety- minded supervisor and a comprehensive training program.  Safety  inspections  are  an  important  tool for maintaining mishap-free working conditions. Some  of  the  Navy’s  major  safety  programs  are the  Hearing  and  Sight  Conservation  Programs, Respiratory   Protection   Program,   Heat   Stress Program,  Electrical  Safety  Program,  Foot  and Head  Protection  Program,  and  Toxic  Material and  Electromagnetic  Radiation  Hazard  Programs. As a supervisor, you should be familiar with these and  other  safety-related  programs. Personnel  safety  includes  an  awareness  of  the possibility of chemical warfare and its associated countermeasures. 6-24