Only qualified Electrician’s Mates should do the actual connecting; however, the portable cables may be laid  out  by  other  party  personnel.The  repair  party electrician  must  wear  rubber  gloves,  rubber  boots,  and stand on a rubber mat while making connections. Each casualty power riser or bulkhead terminal must be tested with a voltage tester before a connection can be made to the terminal. The duty of the repair party Electrician’s Mate is to determine that all sources of power to the equipment concerned are de-energized before rigging casualty  power.  The  portable  cable  connections  for casualty  power  should  always  be  made  by  first connecting the load and then working back to the source of  power. On large ships, casualty power runs involve more than  one  repair  party.  All  repair  parties  should  rig simultaneously, but the rule of “rig from load to source” should  always  be  observed  Each  repair  party  must report its section rigged from riser or bulkhead terminal number to riser or bulkhead terminal number to damage control  central. In all instances of rigging and energizing any part of the casualty power system, only the damage control assistant, with the authority of the chief engineer, has the  authority  to  order  the  system  energized. In making casualty power connections at a load where there are no circuit breakers or transfer switches to interrupt the incoming feeder cable, the load must be disconnected or cut at the equipment. It is quite possible that the feeder cable may be damaged by the casualty that  caused  the  loss  of  power.  A  damaged  cable,  if energized,  would  probably  trip  the  casualty  power circuit  breakers.  If  not  disconnected,  this  incoming feeder cable may be re-energized, and present a hazard to personnel handling the casualty power cables. The keep the phase sequence correct in ac systems, exercise  care  in  making  all  connections.  The  riser terminals, bulkhead terminals, and portable cable ends are marked to identify the A-, B-, and C-phases. You can make the identification visually by color code. In the dark you can make the identification by feeling the bumps  on  the  riser  terminals  or  feeling  the  twine wrappings or O-rings installed on the cables. Ordinarily,  portable  casualty  power  cables  should be tied to the overhead. High-voltage signs should be attached  at  each  connection  and  the  information  passed over the ship’s 1MC system informing all hands to stand clear of the casualty power cables while energized. AS  previously   stated,   power   panels   supplying equipment designated for casualty power service will have a power terminal box mounted on the panel so that power may be fed into the panel. Remember that these panels can also be used as a source of power for the casualty  power  system  should  power  still  be  available from the permanent feeder or feeders to the panel. Some judgment should be exercised, however, in the choice of panels  to  be  used  for  supplying  casualty  power  loads. Heavy  loads  should  be  connected  to  power  panels having large incoming feeders for greater assurance that circuit breakers will not trip and that the cable will not become  overheated.  Current  loading  of  casualty  power cables  is  not  considered  excessive  when  you  can  grasp the  cable  by  hand  and  it  does  not  cause  burning. Portable cable used in ac casualty power systems is Navy   LSTHOF   42.   Although   the   normal   current carrying capacity of this cable is 93 amperes, its casualty rating is 200 amperes. Under normal conditions this cable  will  carry  200  amperes  for  4  hours  without damage to the cable. Cables maybe run in parallel to circuits that overload a single cable. Recommended  SAFE  procedures  to  be  used  in rigging  casualty  power  include  the  following: 3-15 Upon report of loss of power, damage control central  orders  the  repair  party  nearest  the equipment  concerned  to  investigate. The  repair  party  Electrician’s  Mate  of  the investigating  team  immediately  tests  to determine  if  all  sources  of  power  to  the equipment have been lost. Upon  determining  that  all  power  is  lost,  the Electrician’s  Mate  opens  all  supply  switches  to the equipment and reports to damage control central that power is lost to the equipment. Upon receiving a report of all power lost, damage control  central  requests  main  engine  control  to designate  a  source  of  casualty  power  for  the equipment concerned. The request for a casualty power  source  may  be  made  to  the  electrical officer on ships having a combined main engine control and damage control central or where the electrical  officer  is  stationed  in  damage  control central for the control of generators and power distribution. Main engine control or the electrical officer, as appropriate,  informs  damage  control  central  of the casualty power source to be used (giving riser terminal number) and, at the same time, informs the  Electrician’s  Mate  on  the  appropriate switchboard  that  his  or  her  board  has  been