Page 33 - Flip IOCL Book.cdr
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Root Cause

            Poor area preparation at  (FOR) hot job.



             Recommendations

            1. Ensure all bolts/studs of HC line blind flanges are tightened completely.
            2. Hot job site shall be barricaded properly while welding, grinding activities.





             Case 10                              Date: 26.09.2019                       Time: 20:24 hrs.


             Incident


            Sparking  occurred  in  300  mm,  440Volt,  3.5  core  underground  power  cable  laid  from  CISF  Sub-station  to
            officer's married hostel. Insulation of underground power cable has got damaged during excavation job by JCB
            being carried out for laying underground drinking water line, As the load increased on the cable and exposed
            to moist air, sparking occurred on the damaged portion of cable. Cable marker is also placed at the site but got
            ignored due to poor supervision.























                                    Electrical Cable                     Damaged cable
                                    Route marker



             Root Cause

            Contactor supervisor ignored the cable route marker.


             Recommendations

           1.  Manual excavation shall be done at designated locations (where cable markers are placed to know the
              exact location of cable) on the route before starting mechanized excavation.

            2.  For Outside Battery limit, Elect Maint to issue a drawing showing cable route so that mechanized
              excavation is only done along the said route after completion of manual excavation.
            3.  Any abnormality like cable damage while excavation, should be reported immediately to site in
              charge / Engineer in charge.


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