tender for work of chemical earthing of various dts damaged earthing work - 1 chemical earthing work (supply and installation) of 34 damaged nutral earthing of distribution transformers installed at various lt substations as per following :-note :- the all material and labour shall be provided by the contractor with 24 month guarantee for resistance value less than one ohm. 2 providing of earthing electrode :-material description : gi electrode, galvanization : 150 micron (min),is standard : is 3043 / ieee - 837, short time current rating ka (rms) for 1 sec : 42 ka for 1 sec, dia of electrode : 50mm, length of electrode : 3000mm, weight of electrode : 15 kgm, pipe thickness : 4mm or as per is : 1239 4mm, inside filling material : crystalline conductive mixture, inner strip : 3100 x 50 x 6 mm,terminal hole dia : 16 mm. technology : metal thermal spray (joints) protection earthing resistance value in different soil conditions with eric backfill compound : normal soil - upto 2 ohms, sand. muran soil - upto 4 ohms, rock soil - upto 4 ohms,electrode testing cetificate : cpri testd. surrounding filling material (eric):- product : eric (earth resitance improvement compound), is standard : is 3043/ieee 837, chemical composition : graphite, activated carbon, bentonite, etc., resistivity value : >0.2 ohm per meter, melting temperature : 2500 degree centigrade,specific gravity : 2.6, ph value of chemical : 7-9, solubility in water : 3.54, colour : light cream/ash, main caution ; sodium, moisture capacity at 105 degree : 10%, weight of chemical used / earthing pit : 50 kg, water absorbing capacity : 20 times, environmental effects : eco friendly. test certifictae : rohs certified, thermal stability : testsed, corrosion resistance : tested, swell test certificate : yes, ph value test certificate : yes. installation parameter :- need hole dia : 6-8 need hole depth : 3 meter,guarantee : 24 month. 3 providing and fixing of gi strip of size 32 mm x 6 mm suitable for distribution t/f installed at above 11/0.4 kv l.t. substation. 4 providing and fixing of pvc pit covers for above earthing electrode terminals. please enable macros to view boq information