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SUMMARY - 14098_31
BASICS OF ELECTRIC SHOCK

Firecontrolman Volume 01-Administration and Safety
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CHAPTER 3 ELECTRONICS SAFETY INTRODUCTION Electronics safety is essential for the well-being of every Fire Controlman. If you, as a technician, are not thoroughly familiar with electronics safety, you may become the next casualty. To be an effective Fire Controlman, you must be thoroughly  familiar  with  all  aspects  of  electronic safety.  Statistics  show  that  a  high  percentage  of accidents and casualties could have been prevented if some specific precautionary measures had been taken. Common sense, good indoctrination, and training are required  of  all  personnel  maintaining  and  operating electronic equipment. When  working  with  electronic  equipment,  you should  remember  this  rule:   SAFETY  FIRST. Dangerous voltages energize much of the equipment you work with. Use the safety precautions outlined in this chapter to  complement  information  given  in  your  electronic equipment   instructions.     These   instructions (applicable  directives  and  equipment  technical manuals) provide specific safety instructions. Before you perform maintenance on any equipment, be sure to observe all required safety precautions. This  topic  discusses  electric  shock,  voltage measurement,  electromagnetic  radiation  hazards, tagout bills, and protective equipment. ELECTRIC SHOCK Electric shock is the sensation and muscular spasm caused when electric current passes through the body. The word current is underlined in the last sentence to emphasize that it is the current and NOT the voltage that  causes  electric  shock.  No  matter  how  much voltage  is  present,  you  will  be  shocked  only  if  you provide a ground path for the electric current. The following excerpt from a mishap report shows just  one  result  of  not  following  proper  safety procedures: “While trying to adjust the alignment between coarse and fine synchros in the gun drive drawer, a Fire Controlman received a shock from a 115-volt source. While    performing    preventive maintenance, he discovered that the alignment did not meet the performance specifications required by  the  maintenance  requirement  card  (MRC). After trying to align the synchros, he discovered that the fine synchro was faulty.   To get into the synchro  control  box,  he  removed  the  insulation cover. While adjusting the synchro, the technician touched the exposed wiring on the synchro with his thumb, allowing 115 volts of alternating current to enter his thumb and forearm.  He went to medical, after  which  the  corpsman  sent  him  to  the  naval hospital for evaluation and observation.   He was released the next day, slightly damaged, but very much  aware  of  the  value  of  following  safety procedures.” 3-1 LEARNING OBJECTIVES Upon completing this chapter, you should be able to do the following: 1.  Describe electric shock and its effects on the human body. 2.  Describe the procedures to follow for measuring voltages. 3.  Describe electromagnetic radiation hazards. 4.  Describe the tag-out bill and its responsibilities and procedures.






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