TM 10-5410-221-10 condition has been corrected.  For  location  and  function of circuit breakers refer to figure 2-9. 2-13.  Electrical Convenience Receptacles The  convenience  receptacles  consist  of  twelve  duplex outlets, located at intervals along the left and right walls, and  on  the  left  and  right  sides  of  the  ceiling,  providing 120 volt, 60 Hz and 400 Hz electrical power (fig. 1-3). a 120 Volt, 60 Cycle, Convenience Receptacles. The  convenience  receptacles  are  standard  parallel  type twist lock receptacles.  Six receptacles are located on the walls   of   the   shelter   and   four   on   the   ceiling.      Each receptacle   has   voltage   and   cycles   noted   on   the   face plate. b. 102  Volt,  400  Cycle,  Convenience  Receptacles. The  convenience  receptacles  are  standard  parallel  type twist  lock  receptacles.    Two  receptacles  are  located  on the walls of the shelter.  Each receptacle has voltage and cycles noted on the face plate. 2-14.  Fluorescent Light Assemblies Two   fluorescent   light   assemblies   are   provided   in   the center section ceiling, and two light assemblies in each of the  fold-out  sections.    The  light  assemblies  are  flush- mounting, replaceable type, housing one 80-watt square fluorescent  lamp  panel.    The  interconnecting  wiring  for the  lights  are  contained  in  raceways  that  are  separate from other wiring for radio noise filtering purposes. A    flexible    shielded    insulated    cable    is    provided    for connecting  the  fold  out  ceiling  Iights  across  the  hinge line. 2-15.  Air-Lock Light Assembly The air-lock light-cable assembly is a rugged, weatherproof  type  fixture,  accepting  a  standard  base  50 watt, incandescent lamp.  The light operates on 120 volt, 400   Hz   power   and   is   connected   directly   either   to   the power-input panel or power output panel (fig. 1-3). 2-16.      Water   Box   Interior   Connections   and   Sump Installation The water box interior connections and sump installation is   located   at   the   front   fixed   wall   of   the   shelter   and consists    of    hot    and    cold    water    connections,    sump, vacuum  connection,  washer  drain,  and  overboard  drain (fig. 2-10). a. Hot  and  cold  water  connections.    The  hot  and cold water connections contain two capped ports each to facilitate connection of water service equipment. b. Sump.  The sump is secured to the shelter floor in  front  of  the  water  box  and  contains  connections  for sump vent, service equipment drain, and sump drain. (1) vent.   The sump vent is located at  the  top side  of  the  sump  and  vents  the  sump  to  the  overboard drain. (2)    Service    equipment    drain.        The    service equipment  drain  is  located  at  the  top  side  of  the  sump. The  drain  allows  waste  from  service  equipment  to  enter the sump. (3) Sump drain.   The sump drain is located on the  bottom  of  the  sump  and  is  connected  to  the  sump pump    to    facilitate    draining    of    waste    from    service equipment. c. Vacuum Connection.  The vacuum connection is located on the inner face of the water box and facilitates connection and operation of vacuum equipment. d. Washer  Drain.    The  washer  drain  is  a  plugged port   located   on   the   inner   face   of   the   water   box   and facilitates draining of washer, when used. e. Overboard Drain.  The overboard drain is located on   the   top   left   end   of   the   water   box   and   contains connections for humidifier drain and sump vent. (1) Humidifier drain connection.  The humidifier drain connection is a capped port on the overboard drain which   is   utilized   for   drainage   of   the   humidifier,   when used. (2) Sump   vent   connection.      The   sump   vent connection    has    a    sump    vent    line    connected    which facilitates venting of the sump to the overboard drain. 2-17.  Water Outlet Panel The water outlet panel is located at the bottom rear of the shelter    and    serves    as    a    interconnection    point    for additional   shelters.      The   water   output   panel   contains connections for hot and cold water outlet, drain outlet and hose heater (fig. 2-11). a. Hot and Cold Water Outlet Connections. Two outlet connections are furnished for interconnection of shelter water system. b. Drain  Outlet  Connection.    The  drain  connection facilitates interconnection of shelter drain systems. c. Hose    Heater    Receptacle.        The    hose    heater receptacle  is  provided  as  a  source  of  120  volts,  400  Hz electrical power for outlet hose heater. 2-18.  Conditioned Air System Ducts are installed between a conditioned air source and the expandable shelter roof duct adapter to provide inlet or return air passage for 2-41