works contract for day to day preventive and breakdown maintenance including emergency breakdown at night of765kv, 400kv, 230kv and 110kv ehv lines in 230kv gummidipoondi operation division ( gummidipoondi lines section, athipet lines sub division / chennai edc north ) of chennai / operation / north circle for a period of 3 years from the date of utilization. ; 1 regular day to day works 2 fitter i class 3 mazdoor category ii 4 reliever fitter i class 5 reliever mazdoor category ii 6 emergency at nights 7 fitter i class 8 mazdoor category ii 9 total eht line maintenance 10 mazdoor category ii 11 inr zero only