provision of runway guard lights at operational area provision of runway guard lights at operational area dr babasaheb ambedkar international airport nagpur , supply of following 5kv grade , single core , copper conductor , pvc insualted & pvc sheathed , unsheilded airport lighting cable confirming is 1554 ( part-ii ) with upto date amendent confirming to technical specification attached etc . as reqd . , 1 x 6 sq . mm . , laying of one number xlpe insulated and pvc sheathed power cable of 1 . 1 kv grade of following size exceeding 25 sq . mm . but not exceeding 120 sq . mm . in the existing rcc/hume/ stoneware/metal/hdpe pipe as required . , laying of one number pvc insulated and pvc sheathed /xlpe power cable 1 . 1 kv grade of size not exceeding 25 sq . mm . but not exceeding 120 sq . mm direct in ground including excavation , sand cushioning , protective covering and refilling the trench etc . as required . , upto 25 sq . mm . , supply of 6 sq . mm . essna connector . , re-connection of existing 6 sq . mm . copper conductor cable with essna connector etc . as required . , installation , testing and commissioning of glf fittings on the existing transformer housing box including installation of isolating transformer lens , filters , lamps and other accessories alignment levelling making transformer connections and earth connection etc . complete as required . , excavation of the trench in the hard rock not exceeding 1 . 5 metres in width , and lift upto 1 . 5 metres , including getting out the excavated soil and disposal of excavated soil as directed with in a lead of 50 mtrs . , supplying and laying 6 swg gi wire at 0 . 50 mm . below ground level for conductor earth electrode , including soldering etc . as required . , supply of elevated led runway guard light model no . letg , make - ocem icao annex 14 volume , 1 compliance . , supply of ci isolating transformer housing box , water tight round type , metal container of outside size 330 mm dia heigh 450mm made of 10mm thick cast iron moulding all round , expect the top surface , which is 15mm thick , cast iron moulding suitable to receive a light fitting base plate on the top and underground housing associated with transformer power cable and having a clear hole centre at one side surface centre 75mm above bottom surface suitable to supply & receive one no of 50mm dia b class isi mark gi pipe ( as per approved list of make ) , including check nuts as required . the box should have two ss earth bolts of m10 x 30mm tapped inside near the hold ( 4 away from the hold centre ) and having a drain hold at the bottom suitably tapped to receive 15mm dia , b class ci pipe and having clear opening of 220mm at the top surface and 6 nos m10 tapped hole at the hold centre 260mm to receive fitting base plate and bolts as required as per the drawings . , installation of ms transformer housing boxes of size 330mm dia and 450mm heigh in ground near runway / taxiway with 1:2:4 cement concrete 150mm in all around and in bottom i/c excavation of soft soil , leveling etc . as reqd .