Military Engineer Services Tender

M&L for Earthing complete with galvanized steel earth plate electrode 60 cm x 60 cm x 6 mm thick surrounded with charcoal and salt, buried directly in ground (earth pit not less than 2.25 metre deep below ground level) with top edge of plate not less than 1.5 metre below normal ground level connected to galvanized earth lead using GI earth strip in size 32 x6 mm means of bolts, nuts, check nuts and washers of galvanized iron or steel all as shown in electrical Plate No 3 of MES SSR Part-I connected to main switch board or main control board all as specified and testing on completion including provision of earth wire protected by galvanized iron 15 mm dia light grade pipe and watering pipe shall be 20 mm bore light grade including all excavation and earth work in any type of soil, PCC pit with pre-cast RCC cover, charcoal/salt, funnel etc complete all as directed. (i) The concrete pit shall be PCC 1:3:6 type C-1, 40 mm thick pre cast cover slab of RCC (1:2:4) type B-1 using 20mm graded stone aggregate reinforced with 8mm TMT bars @ 10 cm C/C on both sides with suitable cast iron handle shall be provided in lieu of cast iron cover shown in electrical plate No 3 of MES SSR Part-I. (ii) Item includes the cost of 7.50m GI pipe for protection of earth wire/strip Any variation in length shall be adjusted through deviation order. (iii) Item includes cost of 7.50m earth lead wire/strip. Any variation in length shall be adjusted through deviation order. (iv) PCC pit shall be provided at least 500 mm away from the pit and not on the earth pit itself and the extra cost of additional length of watering pipe, bends, elbow etc shall be deemed included in the unit rate.

M&L for Earthing complete with galvanized steel earth plate electrode 60 cm x 60 cm x 6 mm thick surrounded with charcoal and salt, buried directly in ground (earth pit not less than 2.25 metre deep below ground level) with top edge of plate not less than 1.5 metre below normal ground level connected to galvanized earth lead using galvanised earth lead wire 4.0mm dia means of bolts, nuts, check nuts and washers of galvanized iron or steel all as shown in electrical Plate No 3 of MES SSR Part-I connected to main switch board or main control board all as specified and testing on completion including provision of earth wire protected by galvanized iron 15 mm dia light grade pipe and watering pipe shall be 20 mm bore light grade including all excavation and earth work in any type of soil, PCC pit with pre-cast RCC cover, charcoal/salt, funnel etc complete all as directed. (i) The concrete pit shall be PCC 1:3:6 type C-1, 40 mm thick pre cast cover slab of RCC (1:2:4) type B-1 using 20mm graded stone aggregate reinforced with 8mm TMT bars @ 10 cm C/C on both sides with suitable cast iron handle shall be provided in lieu of cast iron cover shown in electrical plate No 3 of MES SSR Part-I. (ii) Item includes the cost of 7.50m GI pipe for protection of earth wire/strip Any variation in length shall be adjusted through deviation order. (iii) Item includes cost of 7.50m earth lead wire/strip. Any variation in length shall be adjusted through deviation order. (iv) PCC pit shall be provided at least 500 mm away from the pit and not on the earth pit itself and the extra cost of additional length of watering pipe, bends, elbow etc shall be deemed included in the unit rate.

Supply,installation and testing of waterless and maintenance free (Marconite Concrete Earth Electrode) Earthing (grounding) electrode of size dia 85 mm x length 3000 mm with 17.2 mm Cu bonded MS conductor in Pre cast in high purity electrically conductive granular (Marconite), with copper bonded MS rod dia 17 mm x 3 mtr length embedded in 85 mm dia of marconite, having ultra low resistivity of 0.1 Ohm to 0.3 Ohm (Provide the resistivity certificatefor the same) Electrode made of electrically conductive granular mixed with cement to pre cast or backfill the voids surrounding the metal conductor in augured bore hole of 100 mm dia x 3000 mm depth, resulting in increase of effective surface area of the earth electrode and in case of high soil resistivity agrid of multiple electrode to be installed to lower the desired earth resistance value, permanently with no further maintenance or periodic watering or recharge during it's life of over 50 years in all type of soil including dry or rock soil. Earth enhancing material should not leach into the adjacent soil or underground water channels and its pH should be in neutral range. Earth enhancing material should permanently protect the encased metal conductor of corrosion. Electrodes top terminal should be sealed permanently with the conductive concrete and extension strip taken out be terminated at earth bus bar. other hardware like nuts, bolts and washers should be of stainless steel. Electrode should withstand fault current up to 30 kA for 1 second. (Bidder provide the certificate for the same) Note : Supplier of the Marconite earthing materials should provide authorization letter from the manufacturer for the Genuine material and also furish certification as per IEC 62516-7 & resistivity certificate confirming 0.1 ohm - m complete all as directed by Engr-in-Charge. Make - Marconite/Intess/Earthonite