REPAIR MAINT OF LIGHTNING PROTECTION, EARTHING ALONGWITH OTHER CONNECTED E/M WORK AT HEMRL LAB UNDER GE (I) RnD PASHAN

Supply and fix earth pit indicator made out of 200x250x2 mm MS sheet fixed on and including 25x25x3mm angle iron post 1 metre length with PCC 1:2:4 type B1 foundation block of size 200mm x 200mm x 300mm height using 20mm graded stone aggregate and painting exposed surface with two coats of synthetic enamel paint over coat of red oxide primer and writing letters (i) Earth pit No. (ii) Earth result in Ohms (iii) Date of testing complete all as specified and directed.

Material and labour for earthing with galvanised steel earth plate electrode 600 X 600 X 6 mm thick buried directly in groung earth pit not less than 2.25 metre deep below ground level with top edge of the plate not less than 1.5 metre below normal ground level connected to galvanised strip 32x6mm by means of nuts, bolts, check nuts, washers of galvanised iron or steel all as shown in electrical plate No 03 of SSR Part-I connected to earthing test point including excavation / earth work in any type of strata, removal of surplus excavated material, GI pipe for watering and funnel, PCC 1:3:6 type C1 chamber including necessary formwork / moulded for fair and even surfaces, precast RCC 1:2:4 type B0 chamber cover slab, GI funnel , with GI watering pipe 20mm bore med gde, wire mesh, protection pipe 40mm bore GI pipe light gde for earth lead upto 7.50 metre long including testing complete all as specified and directed by Engr-in-charge. Note : Test report shall be prepared and submitted by the contractor in triplicate duly obtaining signatures of MES JE / AGE & PMG / user. Test reuslts are to be written in letters of 20mm height in white colour on black paint background.

Material and labour for testing of conventional type lightning protection system as specified here in under in Technical Area / Lab/ Magzine bldgs inside HEMRL Complex :- (a) Before testing a visual check to be carried out jointly by the contractor, Engr-incharge and rep of users for the mechanical condition of all condutors, bonds, joints. (b) Testing continuity and resistance of conductors, Ohmic resistance of lightning conductor system complete with air termination but without the earth electrode connection and recording results. (c) Testing of each electrode point without continuity conductors, air termination and ring conductor. (d) Testing the resistance to earth of the whole installations with all earth electrodes continuity, conductors, air termination and bonding of other services and results are to be recorded. (e) All above testing are to be done in accordance with STEC Pamphlate No 7 and IS 2309,1999 (2nd revision) and IS 3043, 1987. The results are to be recorded in prescribed format duly signed by contractor, Engr-in-charge and rep of users and to be submitted by contractor in triplicate. Notes : (i) The testing mentioned above against (b) to (e) will be conducted only after rectifying the defects observed during visual check. (ii) Material and labour required for rectification of defects observed will be measured and paid separately under relevant itmes of sch 'A'. (iii) Unit rate quoted is deemed to be inclusive of writing board in white colour letters n. exc 2cm height on the black colour background on wall such as - tested on, due date of testing, E.g. EP No 1-ER 10 Ohms. EP No should be mentioned on individual earth pits and ER value of installation etc. all as specified and directed by Engr-in-charge. (iv) Contractor has to arrange necessary testing instruments of suitable range duly latest calibrated (certificates to be produced). The rate quoted is deemed to be include the above provision. (v) If Ohmic resistance valve exceeds 1 Ohm the system to be rectified by cleaning with CRC solution, tightening, replacement of bolts / nuts, rivets etc. to get value below 1 Ohm. (vi) LP system for complete bldg/magzine/shed/lab will be measured as one unit.

Supply and fix in repairs FLP Exhaust fan of size 300 mm with louvers single phase 240 volt , 0.5 HP, 1414 RPM including connecting with armoured cable from junction box to fan connector complete all as specified and directed.

Supply and fix in repair flame proof distribution panel board made out LM6 material and high tensile steel hinges and nuts with and including incomer 200 Amps 4 Pole, 25KA MCCB-01 No and Outgoing MCB TP 100 Amps, 18 KA -1 No, MCCB TP, 10 KA 63 Amps-4 Nos, MCB SP 6A-16A, 10KA-04 Nos complete all as specified and directed.

Supply and fix in repair of air termination single pointed aluminium rod of 12mm dia 300mm long fixed to aluminium strip 25x3mm including drilling holes, nuts, bolts washers for resting / supporting of air terminals etc. complete all as specified and directed.

Supply and fix in repair flame proof distribution panel board made out LM6 material and high tensile steel hinges and nuts with and including incomer 100 Amps, 18KA TPN MCCB-01 No and Outgoing MCB TP 63 Amps, 10 KA -2 Nos, MCB TPN 63 Amps-1 No, MCB TP 32 Amps, 10KA-04 Nos and MCB SP 16 Amp, 10 KA-07 Nos complete all as specified and directed.

Supply and fixing copper plate 150x150x3 mm thick with 1 No. round solidcopper bar 20mm dia & 150mm long brazed or threaded & fixed in the centre of the plate for manual electrostatic discharge & fixed on existing wall at height of 1.5 mtr all as directed.

Material and labour for copper strip 20x3.15 mm with saddles and fixing screws etc. for roof conductors and down conductors above ground on wall or roof complete all as specified and directed

Supply and fix in repair flame proof distribution panel board made out LM6 material and high tensile steel hinges and nuts with and including incomer MCCB 4 Pole, 63 Amps, 10KA-01 No and Outgoing MCB 04 Pole 32 Amps, 10 KA - 04 Nos, MCB SP 16 Amps, 10KA-06 Nos complete all as specified and directed.