REPAIR / REPLACEMENT OF EARTHINGS, UNSERVICEABLE LIGHTING CONDUCTORS, LIGHTNING ARRESTOR AND ALLIED WORKS IN THE AREA OF AGE(I) CHAKRATA UNDER HQ CWE DEHRADUN

M&L for testing of existing earthing in AGE (I ) Chakrata area using four point method (wenner method) or three terminal methods (fall of potential method) with appropriate earth resitance tester, spike and wire, recording of earth test results in register as per format given by Engr-in-charge and submitting the same to Engr-in-charge after test complete all as directed at site.

M & L for earthing complete with galvanized steel earth plate electrode of 60 cm x 60 cm x 6 mm thick buried directly in ground [earth pit not less than 2.25 metre deep below normal ground level] with top edge of the plate not less than 1.5 m below normal ground level, connected to galvanized earth strip 32x6 mm by 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 all as specified and testing on completion including provision of earth lead protected by 50 mm dia light grade GI pipe & watering pipe shall be 20 mm bore medium grade GI pipe including all excavation and earth work, PCC pit with RCC cover, char coal, salt, funnel etc complete. Note:- Rate quoted by tenderers shall be deemed to include for following provisions- [i]. Excavation & earth work in any type of soil including removing of surplus material upto 50 m. [ii].PCC 1:3:6 type C1 using 20mm graded stone aggregate in pit & 40mm thick precast RCC 1:2:4 type B1 cover 50x50 cm with 8mm TMT bars @ 10 cm C/C both ways with handles. [iii]. Main earthing lead from earth electrode to test point upto 7.5 mtr. [iv]. Funnel with watering pipe [GI pipe] 20mm bore medium grade and charcoal & salt around earth plate in alternate layers of 15 cm [v]. GI protection pipe of size 50 mm bore light grade upto 7.5 m.

M & L for earthing complete with galvanized steel earth plate electrode of 60 cm x 60 cm x 6 mm thick buried directly in ground [earth pit not less than 2.25 metre deep below normal ground level] with top edge of the plate not less than 1.5 m below normal ground level, connected to galvanized earth strip 25x4 mm by 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 all as specified and testing on completion including provision of earth lead protected by 40 mm dia light grade GI pipe & watering pipe shall be 20 mm bore medium grade GI pipe including all excavation and earth work, PCC pit with RCC cover, char coal, salt, funnel etc complete. Note:- Rate quoted by tenderers shall be deemed to include for following provisions- [i]. Excavation & earth work in any type of soil including removing of surplus material upto 50 m. [ii].PCC 1:3:6 type C1 using 20mm graded stone aggregate in pit & 40mm thick precast RCC 1:2:4 type B1 cover 50x50 cm with 8mm TMT bars @ 10 cm C/C both ways with handles. [iii]. Main earthing lead from earth electrode to test point upto 7.5 mtr. [iv]. Funnel with watering pipe [GI pipe] 20mm bore medium grade and charcoal & salt around earth plate in alternate layers of 15 cm [v]. GI protection pipe of size 50 mm bore light grade upto 7.5 m.

M & L for earthing complete with galvanized steel earth plate electrode of 60 cm x 60 cm x 6 mm thick buried directly in ground [earth pit not less than 2.25 metre deep below normal ground level] with top edge of the plate not less than 1.5 m below normal ground level, connected to galvanized earth wire 4 mm dia by 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 all as specified and testing on completion including provision of earth lead protected by 40 mm dia light grade GI pipe & watering pipe shall be 20 mm bore medium grade GI pipe including all excavation and earth work, PCC pit with RCC cover, char coal, salt, funnel etc complete. Note:- Rate quoted by tenderers shall be deemed to include for following provisions- [i]. Excavation & earth work in any type of soil including removing of surplus material upto 50 m. [ii].PCC 1:3:6 type C1 using 20mm graded stone aggregate in pit & 40mm thick precast RCC 1:2:4 type B1 cover 50x50 cm with 8mm TMT bars @ 10 cm C/C both ways with handles. [iii]. Main earthing lead from earth electrode to test point upto 7.5 mtr. [iv]. Funnel with watering pipe [GI pipe] 20mm bore medium grade and charcoal & salt around earth plate in alternate layers of 15 cm [v]. GI protection pipe of size 50 mm bore light grade upto 7.5 m.

M&L for reviving of old unserviceable earthing by excavating the existing earthing, checking the condition of earth electrode of any type, Water pipe, earthing strip of any type, providing of charcoal, salt in alternate layer all arround the earth electrode after cleaning it throughly if found serviceable, re- fixing of existing protection pipe, earthing strip, watering pipe, funnel etc and returning, filling in excavated soil, making of earth pit chamber PCC 1:2:4 type B-1 and earth pit chamber cover reinforced with hard drawn steel wire fabric weighing not less than 4 Kg/sqm in liew of CI cover as per earth plate No 5 of SSR complete all as specifed and directed at site. Note : 1. After excavation of existing earth, if the condition of earth electrode, GI protection pipe, watering pipe, funnel, earth strip is not satisfactory, the same shall be provided under relevent item as supply and fixing, 2. If the condition of earth electrode, GI protection pipe, earth strip, funnel, GI watering pipe is serviceable, then earth shall be revived using necessary quantity of charcoal and salt, cost of the same shall be deemed to be included in unit quoted rates, 3. Cost of excvation, R&F, removal, making of new earth pit chamber of PCC, PCC chamber cover, charcoal and salt, nuts, bolts, washers shall be deemed to be included in unit quoted rates

S&F in repair of Galvanised iron earth electrode plate of size 600x600x6mm complete all as specified and directed at site.

S&F in repair of copper earth electrode plate of size 600x600x3mm complete all as specified and directed at site

S&F in repair of watering funnel as per existing for earthing complete all as specified at site

S&F in repair GI Pipe light grade, 20mm dia , galvanized, with all fittings complete all as specified and directed

S&F in repair GI Pipe light grade, 40mm dia , galvanized, with all fittings complete all as specified and directed