MAINT AND REPAIRS TO BLDG, EQUIPMENT EARTHING SYSTEM, LIGHTNING PROTECTION SYSTEM, DBs, LT SWITCH GEARS ALONG WITH CONNECTED ITEMS AT AFS BIDAR

SCHEDULE OF WORKS

Material and labour for maintenance of the copper earthing of any type and size at scattared area as and when demanded by MES within 48 hours by pouring water, adding salt solution to maintain earth resistance within permissible limit, including carrying out earth test resistance of individual earth along with E-N values of connected equipment, submitting individual earth resistance & E-N values of connected equipment, and to rectify the defects in all respects to obtain permissible values; all as specified and as directed by Engineer-in-Charge.

All as per Item No 1 here-in-above, for GI earthing lead/strip of any type and size all as specified and as directed by Engineer-in-Charge.

All as per Item No above here-in-before but Chemical earthing of any type and size all as specified and as directed by Engineer-in-Charge.

Material and labour for, Tripod Earthing 50 mm dia - 3 numbers of Chemical earthing (maintenance free) corrosion resistant earth electrode copper cladded, copper coating thickness of 250 microns, high tensile low carbon COPPER BONDED ROD ELECTRODES WITH 99.9% with 25KA current discharge test as CPRI, of length 3.0m as per UL 467, with suitable compressive coupler planted at depth not less than 3.0m of bore 100mm below gorund level and duly covered with low resistant superior conductive powdered non corrosive, highly hydrous earth enhancing material, including connecting upto common bus bar grid of size 25 x 3 mm to achieve optimum low earth resistance on inspection/ testing complete all as specified and as directed.

Supply, installation, testing & commissioning of Digital Grounding Device 120 kA Single phase 3 wire portable type with resistance sensor built in low impedance equipment grounding and bonding system, provides 100% protection against Lightning surges, static charge, noises,ESD,EPR and eliminates abnormal electrical disturbances which enter from power and other service lines and ensuring clear bonding potential (earth to neutral voltage) less than 1.0 V having a digital 6 digit lightening surge counter, self-health visual status indicator with facility to monitor online input voltages & earth to neutral voltages pre-wired pulverulent body painted metal enclosure to be connected in parallel to the powersupply circuit, tested and certified from CPRI, MIL STD810G, IEC61000-6-1,IEC 61000-6-3, IEC 61643-11-2011 & confirming to ISO 9000 & ISO 14001-2015 & CE complete all as specified and as directed. Make : - Model: DSE-MII 1P3 120 of make DSS Digital Equipement protection Co. or equivalent model specified here-in-after.

Dismantling the earth chamber, Excavation and removing unserviceable earthing materials along with earth electrodes from the existing earth pits pertaining to installations/ buildings and providing material and labour for maintenance free earthing using corrosion resistant earth electrode copper cladded, copper coating thickness of 250 microns, 17.20 mm dia, high tensile low carbon COPPER BONDED RODS WITH 99.9% with 25KA current discharge test from CPRI of length 3.0m as per UL 467, with suitable compressive coupler planted at depth not less than 4.6m of bore 100mm below gorund level, covered with low resistant superior conductive powdered non corrosive, highly hydrous earth enhancing material all as directed including connecting upto common bus bar grid of size 25 x 3 mm to achieve optimum low earth resistance on inspection/ testing complete all as specified and as directed.

Dismantling earth chamber of earth pits pertaining to installations / building after carrying out necessary excavation, removing unserviceable earthing materials, earth electrodes and providing Material and labour for earthing with GI earth plate electrode 600 x 600 x 6 mm thick burried directly in ground vertically to depth of not less than 2.25 mtr deep below normal ground level with top edge of the plate not less than 1.5 mtr below ground level connected to GI earth wire of 4mm by means of bolts, nuts, washers of GI and provision of earth lead, GI protection pipe with 15mm light grade galvanized including necessary earth work in any type of soil, PCC 1:3:6 type CI (using 20mm graded stone aggregate) earth chamber and 1:2:4 type B1 RCC cover fitted with 50mm thick with 6mm dia MS bars @ 100 mm c/c both ways.. complete all as shown in SSR Pt - 1 electrical plate No 3. Note : i) Quoted rate shall deemed to include cost or excavation and earth work PCC Chamber, funnel cover etc. ii) GI earth wire of 4 mm dia and GI light grade protection pipe 15 mm dia upto 7.5 m shall deemed to be included in quoted rate under this item. iii) GI earth wire of 4 mm dia and GI light grade protection pipe beyond 7.5 m will be measured and paid under respective items.

Dismantling earth chamber of earth pits pertaining to installations/ buildings, after carrying out necessary excavation and removing unserviceable earthing materials, earth electrodes providing Material and labour for earthing with GI earth plate electrode 600 x 600 x 6 mm thick burried directly in ground vertically to depth of not less than 2.25 mtr deep below normal ground level with top edge of the plate not less than 1.5 mtr below ground level connected to GI earth strip of 25x4mm by means of bolts, nuts, washers of GI and provision of earth lead, GI protection pipe with 15mm light grade galvanized including necessary earth work in any type of soil, PCC 1:3:6 type CI (using 20mm graded stone aggregate) earth chamber and 1:2:4 type B1 RCC cover fitted with50mm thick with 6mm dia MS bars complete all as shown in SSR Pt - 1 electrical plate No 3. Note : i) Quoted rate shall deemed to include cost or excavation and earth work PCC Chamber, funnel cover etc. ii) GI earth strip of size 20 mm x 3 mm. and GI light grade protection pipe 15 mm dia upto 7.5 m shall deemed to be included in quoted rate under this item. iii) GI earth strip and protection pipe beyond 7.5 m will be measured and paid under respective items.

Dismantling earth chamber of earth pits pertaining to installations/ buildings, after carrying out necessary excavation and removing unserviceable earthing materials, earth electrodes providing Material and labour for earthing complete with Copper earth plate electrode 600 mm x 600 mm x 3 mm thick burried directly in ground earth pit not less than 2.25 Mtr deep below ground level with top edge of the plate not less than 1.5 Mtr below normal ground level, filling with alternate layers of charcoal & common salt Crystal, in and including back filling compund in layers and filling up with black cotton soil upto the top edge/ ground level and connecting to copper earth strip of size 20 mm x 3 mm by means of bolts, nuts, check nuts & washers of copper and connecting to earth dolly, equipment all as shown in electrical plate No. 5 of SSR Part I of 2009 & testing complete including 40mm dia light grade GI pipe upto 7.5 mtr long, excavation in any type of strata, PCC ( 1:3:6 ) type C1 earthing chamber, pre cast slab 50 mm thick in cement concrete ( 1: 2 : 4 ) type B 1 ( reinforced with welded steel wire fabric (XPM) weight not less than 4 Kg / Sqm with frame, including 20 mm bore water pipe medium grade GI Tubing including GI Funnel , wire mesh etc. NOTE :- i) Copper earth continuity conductor of size 20 mm x 3 mm. and GI light grade protection pipe 40mm dia upto 7.5 m shall deemed to be included in quoted rate under this item. ii) Copper strip and protection pipe beyond 7.5 m will be measured and paid under respective items. iii) Quoted rate shall deemed to include cost or excavation and earth work PCC Chamber, funnel cover etc.