At approximately 17:30 on the 21st of August , a subcontractor tipper while performing a sand dumping activity in Kawthar near RMS 2 station, drove under an isolated Overhead line, While lifting the tipper bed to dump the carried sand, the tip of the tipper came into contact with the line causing damage to the isolated line Why it happened/Finding : Failure to supervise the specific activity executing an activity with heavy moving equipment without a Banksman Failed to obtain approval and a permit to work for the specific activity