Motor control Task # 6

							                                                                                                   Revision block:
                                                                                                   Rev 1 Release           8-20-2004      RAM
                 Phase          Phase            Phase                                             Rev 2, Enlarge          1-4-2005       RAM
                 ”A”            ”B”              ”C”                                               Rev 3 add colors        3-7-2005       RAM
                                                                                                   Rev 4 add grounds       8-4-2005       RAM
                                                                                                   Rev 5 more notes        12-22-2005     RAM
    Three Phase
 Disconnect Switch.



                                                                                                  Notes:
                                                                                                     - If two knockouts are used on the Drum switch to
                                                                                                         route conductors rather then one knockout then
                                                                                                         the conductors coming from the disconnect
                                                                           T1
                                                                                                         switch must be routed through one knockout
                           1
                                 F
                                         3               5                                               opening while the conductors routed through the
                                                                                                         other opening must be routed to the motor to
       Drum                                                                3 Phase                       prevent inductive heating per NEC Article
      Switch.         R              R                       R                                           300.3(B).
                                                 F                          Motor
                                                                 T3                                  - Dress all wires so that cover may be installed and
                               2 F           4               6
                                                                                                         so that the conductors are not rubbing on moving
                                                                                                         parts as the switch is operated.
                                                                                                     - Add ground wires to all boxes.
                                                                                                     - Make sure that all the screws on all the parts used
                                                                                                         for previous tasks have been retightened since
                                                                      T2
                                                                                                         electricians never leave loose screws that can
                                                                                                         vibrate out and fall into something hot shorting
                                                                                                         out and causing an arc blast.
                      Hook up all other motor leads
                      for low voltage as was done
                      on previous tasks.




                                                                                     Title: Motor Control Task; Drum Switch.
                                                                                     Draw date: 8-20-2004.
                                                                                     Drafted by: R.A. Melcher .
                                                                                     Checked by: R.A. Melcher.
                                                                                     Scale:      N/R.


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