check voltage to these receptacles to ensure they are de-energized before installing the shore cables. RIGGING SHORE POWER The   following   procedures   apply   to   the   shore installation with a separate circuit breaker or disconnect for each set of cables and a single, 3-phase receptacle is not  used.  You  should  follow  these  basic  instructions  and procedures  before  and  during  connecting  to  shore power. Connect  and  disconnect  shore  power  under  the direct  supervision  of  the  electrical  officer,  a qualified  leading  electrician,  and  shore-activity personnel. Visually inspect shore-power cables for any sign of defects (such as cracks, bulges, and indications of  overheating),  thoroughly  examine  spliced cables, in particular, because improperly spliced cables are extremely dangerous. Strip lug-to-lug connection splices of insulation and check the connection for cleanliness, tightness, and good surface  contact.  Repair  all  defects  and  reinsulate all  lugs  before  cables  are  placed  in  service. Check cables for insulation resistance using a 500-volt  Megger  (megohmmeter).  Insulation resistance readings should meet requirements of Naval Ships’  Technical  Manual,  “Electric  Plant General,”  Chapter  300.  Check  the  resistance between phases and between each phase and ground. For purposes of the test, shore ground should be the enclosure that houses shore-power terminals   or   receptacles.   On   ships,   ground should  be  the  hull  of  the  ship  or  any  metal extension   of   the   hull.   During   the   physical inspection and Megger tests, check the phase identification   of   the   cables.   Pay   particular attention  to  cables  that  have  been  spliced  to ensure  that  the  phases  of  the  cables  are continuous  and  have  not  been  altered  at  the splices. Tag  with  high-voltage  signs  and,  if  possible,  rope off  the  work  area  surrounding  the  ship’s shore-power  terminal  box  or  receptacle.  This box or receptacle is often exposed to elements, and any moisture present can cause a serious problem. With the ship’s shore-power breaker tagged  in  the  open  position,  disconnect  all equipment (such as meters and indicator lights) that could be damaged by a Megger test or cause a false wading. Test the terminals in the ship’s shine-power terminal box or receptacle with a 3-17 voltage tester to ensure they are de-energized Next,  with  a  500-volt  Megger,  test  the  insulation resistance  between  terminals  and  from  each terminal  to  ground. Lay out the cable between the supplying shore- power outlet and the ship’s shore-power terminal box or receptacle. Ensure that the cable is of sufficient length to allow enough slack for the rise and fall of the tide, but not of such length as to permit the cable to dip into the water orbecome wedged between the ship and pier. Do not permit cables to rest on sharp or ragged objects, such as gunwales.  Avoid  sharp  bends.  Lay  cables  in wood  saddles  or  wrap  them  in  canvas.  Raise splices  and  connectors  from  the  deck  or  pier  for protection  against  water  contamination.  Neatly fake  out  excess  cable  to  minimize  damage  from vehicle  and  pedestrian  movements. Connect   the   shore   cables   to   the   ship’s shore-power  terminals  according  to  phase  or polarity markings in the box and on the cables. Ensure  correct  phase  orientation  (phase relationship)  by  checking  color  coding  or  phase identification  markings  on  cables.  Reconfirm correct  phase  identification  by  meggering between  like  phases  of  cables.  Cables  that  give a  zero  indication  will  have  the  same  phase relationship.  After  meggering,  reconnect  any disconnected  equipment. With  a  voltmeter,  check  to  ensure  that  the shore-power  terminals  are  de-energized. Connect the shore-power cable to the terminals. Check  for  proper  phase  rotation  either  by alternately  energizing  shore-power  receptacles, one  at  a  time,  and  observing  the  ship  phase rotation  indicator  mounted  in  the  ship’s  service switchboard  or  use  a  portable  meter  connected to  an  appropriate  bus.  After  checking  phase rotation, de-energize each source shore-power receptacle  before  energizing  the  next  receptacle for the phase rotation check. Energize  all  source  shore-power  terminals  or receptacles  and  proceed  with  the  transfer  of electrical  load  to  shore  power  following engineering  department  operating  instructions. Instructions  will  vary  depending  upon  whether or  not  the  ship  is  equipped  to  synchronize  with shore  power.