TM 55-1930-209-14&P-19 Section II Table 9-3.  Preventive Maintenance Checks and Services for Electrical Power Systems B - Before D - Daily Q -  Quarterly D - During W - Weekly S -  Semiannually A - After M - Monthly A -  Annually INTERVAL ITEM PROCEDURES EQUIPMENT ITEM TO BE CHECK FOR AND HAVE IS NOT READY/ NO. INSPECTED REPAIRED OR ADJUSTED AVAILABLE IF B   D   A   D  W  M   Q   S   A AS NECESSARY NORMAL ELECTRICAL POWER SYSTEM NOTE Only  qualified  personnel,  using  proper and    authorized    test    equipment,    are authorized  to  work  on  electrical  power system  components.    This  system  has been  designed  and  constructed  to  be primarily    maintenance    free    between major shipyard overhauls. NOTE If   electrical   system   fails   to   operate, troubleshoot  according  to  TM  55-1930- 20914&P-9.      Report   deficiencies   and failures  to  shift  leader  or  bargemaster. Keep electrical power systems operational and PMCS logs current. WARNING Make   sure   electrical   components   and circuits  are  turned  OFF  before  starting any inspection and/or cleaning. Observe all posted warnings and safety precautions.  Circuit  breakers  must  be open (OFF). Redtag appropriate switches    and    circuit    breakers    with: "WARNING DO NOT ACTIVATE. REPAIRS BEING MADE." 1 · · Cables a Visually check for loose or damaged Loose or dam- cables.  Make sure all cables are firmly aged cables. attached, corrosion free, and not subject to rubbing or chafing. 2 ·    ·       Electrical b.Check for loose or damaged electrical Electrical connec- Switches, connections, switches, wiring, mounting tions, switches, Mounting Systems    systems, hangars, and electrical insulat- wiring, mounting and Wiring ing material.  Use insulated tools to systems loose or tighten. damaged. 9-4