GE ELECT/D-78/2025-26

Amount

Excavation in trenches not exceeding 1.5m wide & not exceeding 1.5m in depth and not exceeding 10 sqm on plan for foundations , laying of LT under ground cables/ GI pipes and steel tubular poles etc. and getting out as in soft / loose soil complete all as specified and directed by Engr-in Charge.

Returning, filling in, including spreading, levelling, watering and well ramming in layers not exc. 25 cm deep as in soil complete all as specified and directed by Engr-in Charge.

Removal of excavated material not exceeding 50 mtr and depositing where directed at a levelnot exceeding 1.5 mtr above in starting point complete all as specified and directed by Engr-in Charge.

Supply and fixing common burnt bricks as mechanical protection of this cables using old size sub class ‘B’ bricks laid dry flat over the cable width equal to the length complete all as specified and directed by Engr-in Charge.

Sand filling in trenches for cushioning of UG cables as layers of 8 cm before laying and 15 cm after laying of cables complete all as specified and directed by Engr-in Charge. Note:- Measurement shall be taken after Punnning down.

Supply, laying, testing and commissioning in replacement LT XLPE UG cable insulated, armoured heavy duty electric cable, 1100 volts grade with stranded aluminium conductor of 50 sqmm 3.5 core complete including dismantling of old unserviciable cable complete all as specified and directed by Engr-in Charge.

Supply, laying, testing and commissioning in replacement LT XLPE UG cable insulated, armoured heavy duty electric cable, 1100 volts grade with stranded aluminium conductor of 16 sqmm 4 core complete including dismantling of old unserviciable cable complete all as specified and directed by Engr-in Charge.

Supply & fixing 90 Watt LED street light fittings made up of pressure die cast housing with toughned glass and individual high power LEDs with secondary optics, IP66 protection complete all as specified and directed by Engr-in Charge.

Supply & fixing 120 Watt LED Flood light fittings made up of pressure die cast housing with toughned glass and individual high power LEDs with secondary optics, IP66 protection complete all as specified and directed by Engr-in Charge.

Earthing complete with galvanised steel earth plate electrode 60 cm x60 cm x 6 mm thick buried directly in ground ,(Earth pit not less than 2.25 meter deep below ground level) with top edge of plate not less than 1.5 meter below normal ground level ,connected to and including galvanised iron earth wire 32 X 6 mm by means of nut, bolts, check nuts and washers of galvanised iron or steel and provision of charcoal dust and common salt packed all around the earth plate including necessary excavation and earth work in any type of soil and testing complete all as specified and directed by Engr-in Charge and shown in electrical plate number 3 of MES SSR part-I(1991) Note : (a) The unit rates quoted against this item shall be deemed to include the cost of excavation and earth work in any type of soil, common salt & charcoal dust in alternate layers, PCC 1:3:6 as in pit, precast RCC 1:2:4 type B-1 with necessary reinforcement as in cover & frame for pit, funnel, watering pipe 20 mm bore GI pipe light grade, protection pipe 15 mm bore GI pipe light grade etc. (b) The quoted rates shall also deemed to include the cost of earth test point and earth strip/GI lead wire and protection pipe up to 7.5 meter beyond the earth plates electrode

Boring of hole under road/pavement/hard standing or any other situation by mannual means and suitable for passing of GI pipe 40 to 80 mm bore and making good both ends complete all as specified and directed by Engr-in Charge.

Boring of hole under road/pavement/hard standing or any other situation by mannual means and suitable for passing of GI pipe 50 to 100 mm bore and making good both ends complete all as specified and directed by Engr-in Charge.

Supply and fixing multi core round PVC insulated copper conductor (flexible) industrial cables PVC sheathed cables, 1100 volts conforming to IS : 694 of size 2.5 Sqmm, 3 core panel to street light inside/outside pole complete all as specified and directed by Engr-in Charge..

Supply & installing steel tubular swaged poles type 410 SP-31 (9 mtr long) of apprx wt.147 kg conforming to IS 2713 (Part-II) including excavation, earth work, PCC foundation, base plate,PCC coping,GI pipe for cable protection etc. and GI bracket for fitting mounting of flood light fittings , complete all as per manufacturer's instructions and complete all as specified and directed by Engr-in Charge. NOTE:- The unit rate in this item is deemed to be included the cost of exacavation and earth work in any type of soil,PCC foundation 1:4:8 type D-2 , PCC coping 1:2:4 type B-1 as in steel tubular pole and GI bracket made of Channel /flat iron incl nut bolts,clamps etc , 1.5 mtr x 1.5 mtr long for fixing of LED Flood light fitings . The steel pole shall be painted by bituminious paint total lenth inside and up to planting depth outside

Supply and fixing in replacement KIOSK box wheather proof including made out of one piece mounted SMC base and door pole mounted hinged door size 333x233x120mm out side and 300x200x105mm inside dimensions comprising of aluminium bus bar 4 strips for 3 phase and neutral 63 Amps and 15 Amps fuse grip with base including embossing/painting of danger notice of size not less than 10cm x 7.5cm with letters, figures and conventional skull and bones in signal red colour on front face of KIOSK box body complete all as specified and directed by Engr-in Charge.

Supply and fixing 3.5 M long post top light pole aesthetically designed decorative hot dipped galvanised mild steel step pole with grey powder finish , plasma cut & duly chamfered opening window of 300x110 mm for terminal connections & mounting accessories . Window cover is fitted with allen screws to the pole complete all as specified and directed by Engr-in Charge.

Supply errection in position & fixing of complete lighting system using raising and lowering type of high mast tower of 16 Mtr conforming to IS 875 Part III 1987 and suitable for 180 KM/hour wind speed for mounting lantern ring suitable for fixing of 120 watts LED fiood lights fittings 08 Nos(symmetrically fitted, including wiring from ground level to top of the mast, the mast should be motor operated for up and down, double drum carriage, double drum winch 6 mm 316 grade SS having rope of 7/19 with central core SS, construction trailing cable 3 core x 2.5 sqmm 1 No per mast up to height, foundation nut and bolt of suitable size hot dipped galvanized from special steel along with nuts and washers, anchor plates and template & circuit wiring with 10 sqmm copper wire, and power tool control, including RCC foundation as per manufacturers design and drawing complete all as specified & directed. (a) MAST STRUCTURE:- The high Mast shall be of continuously tapered, polygonal cross section polygon type (Minimum 16- Sides) of 15/16 Mtrs. in height presenting good visual appearance and shall be based on proven design to given assured performance, reliability and service. The Mast shall have an approximate top diameter of say 150 mm to 200 mm and bottom diameter of 350 mm to 450 mm, The weight of the Mast shall not exceed more than 1600 kgs, excluding weight of Luminaire, to maintain good elasticity of slender structure. (b) MAST CONSTRUCTION :- The Mast shall be fabricated from special steel plates of BS EN 10025 grade, cut and folded to form polygonal section and shall be telescopically jointed and fillet welded. The welding shall be in accordance with BS: 5135. The procedural weld geometry and the workmanship shall be exhaustively tested by the radiography on the Cpmplete welded and certificates submitted. The Mast shall be delivered in only 2 sections without any circumferential welding at site, which shall be joined together by slip-stressed-fit method. The joining shall be with stressing equipment, thus forming the sleeve joint. No site welding or bolted the joint will be accepted. The overlap distance shall have full penetration of longitudinal welds. The base plate of the mast shall be at least 25 mm. thick. An adequate door opening min 1400mm x 300mm shall be provided at base of each mast such as to permit clear access to equipment like winches, cable pug and socket, etc. The opening shall be complete with a close fitting vandal resistant, weather-proof door provided with a heavy duty lock. For metal protection of the Mast, the entire fabricated Mast shall be hot dip galvanised internally and externally, having minimum average thickness of 65 microns. (c) DYNAMIC LOADING:- The Mast structure shall be designed for an assumed maximum reaction arising from the maximum wind speed at Mendhar and measured at a height of 10 Mtrs. above ground level . The design life of the Mast shall be min. 25 years. Wind excited oscillation shall be damped by the method of construction and adequate allowance made for the related stresses. The offered High Mast shall be a tested design.

(d) FOUNDATION:- The tenderer shall see the site closely and minutely with regard to the nature of the soil, average depth of decomposed garbage and debris at proposed Mast locations and the other site conditions before working out the type of foundation and specifications for the proposed High Mast. The tenderer shall be responsible for the design of the foundation and safe erection and installation of the High Mast in mechanically and structurally safe working condition for the design life of the Mast as per manufacture design The load bearing (safe) capacity of the soil shall be indicted by purchaser to decide the type of foundation and its specifications. The holding down bolts shall be at least 20 nos. of high tensile strength and shall be supplied complete with anchor plate of 6 mm thick for casting into the foundation. The ensure correct vertically and horizontality of bolt alignment. (Note : Cost of foundation as per specification of manufacturer shall be deemed to be included in the rate quoted by the contractor) (e) LANTERN CARRIAGE:- The fabricated lantern carriages shall be provided for holding fittings and control gear provided on each High Mast. The lantern carriage shall be of special design and of durable steel tube construction designed to act as electric conduit with cable holes fully protected by grummets. The diameter of the lantern carriage shall be suitable so as to hold designed number of LED floodlight fittings, as specified in the tender design along with the control gear boxes and lantern. The lantern carriage shall be fabricated in three parts joined by bolted flanges with SS bolts with nuts to enable easy removal from the erected mast for replacement/ maintenance purpose. The carriage shall be supported/ suspended by three wire ropes for better stability. The lantern carriage Assembly shall not touch the lower surface of the Mast. The carriage design and fabrication shall be such that the lantern carriage will suit the lanterns and their control gear boxes to be used in the work. The Lantern Carriage shall be so installed that it does not cause any damage to the surface of the Mast and is provided with protective buffer arrangement. The complete Lantern carriage shall be hot dip galvanised after fabrication. The weather - proof cast aluminum junction boxes (IP-66) shall be provided on the Lantern carriage assembly from which the inter- connections will be made to the designed number of floodlight fittings and lanterns on the carriage.

(f) MECHANICAL ARRANGEMENT:- For installation and maintenance purpose, it will become necessary to raise or lower the lantern carriage assembly. To enable this, a suitable winch arrangement shall be provided in the base of the Mast, complete with top pulley, winch stainless steel wire ropes and winch driving power tool. (i) WINCH:- The winch shall be of completely self-sustaining type. the winches shall be of self- sustaining type by means of an oil bath and the lubrication shall be of recommended quality. Termination of the ropes of the winch shall be in such a way, that it does not involve distortion or twisting of the rope configuration. At least 6 turns of rope shall remain in tension on the drum even when the lantern carriage is fully lowered. the winch shall be designed to be installed or removed form the door opening at the base of the mast. The winch drums shall be grooved to ensure mechanically strong, stable and tidy rope lay with no chances of rope slippage or skippage. The winch shall be capable of operation by hand or by means of external power tool. Integrated power tool with worm is not acceptable. A test certificate shall be supplied along with each winch in support of the maximum load operated by the winch and for the safety of operation at the full load rotation. A handle shall also be provided for hand operation of the winches. (ii) TOP PULLEY ASSEMBLY:- The top pulleys shall be of a diameter, appropriately large enough to accommodate the steel wire ropes and the multicore electric cable. The material of construction of the pulley blocks shall be non- corrosive and made of dia cast (LM-6) aluminum alloy. The pulley assembly shall be complete with self lubricating bearing and stainless steel spindle. (iii) STAINLESS STEEL WIRE ROPES:- Stainless steel wire shall be AISC 316 grade 7/ 19 construction 2 Nos ropes for winch and 3 Nos for lantern carriage, 6 mm dia having a breaking load capacity of 2350 kg complete with stainless steel thimbles. The end for connection to the winch drum shall be fitted with thimbles and the thimbles shall be secured by copper compression splices.

(g) CABLE AND CABLE CONNECTIONS :- The connections shall be made with flat core flexible round sheath power cables of appropriate rating as per the schedule. The base compartment of the High Mast shall have one terminal box for terminating the incomer cable. The maintenance cables equal to that within the Mast and fitted with travelling cable 5 core 4 sqmm flexible having plug socket shall be provided to energize lanterns while in lowering position by hooking up at the base compartment socket supply. Similarly, the provision shall be made for electric supply at the base compartment to enable operation of the external power tool for lowering or rising of the lantern carriage assembly. The trailing cables of the lantern carriage rings shall be terminated by means of metal cased plug and socket provided in the base compartment to enable flexibility. (h) WINCH DRIVING POWER TOOL :- The electric driven tool shall be single speed, (1.2 Mt/min) reversible three phase & hand operated motor. The power tool shall be complete with very robust remote control switch such that the tool can be operated from safe distance of 5 Mtrs. There shall be and arrangement for self alignment off power tool which can be self supported during operation. Manual handle shall be provided for hand operation of the winches. The capacity rating and speed of the electric motor used in the power tool shall be specified by the tenderers. (j) LIGHTNING FINIAL & AVIATION OBSTRUCTION LIGHTS:- One number heavy duty hot dip galvanised lighting finial shall be provided for each mast. Suitable aviation obstruction lights of reliable design and reputed manufacturer shall be provided on top of each mast.

Supply, installation, testing & commissioning HIGH MAST LT panel board, outdoor type, suitable for operation on 415 volts, AC 3 phase, 4 wire, 50 Hz electric supply system,outer body made out of 3.15 mm thick & inner shell made out of 2.00 mm thick CRCA sheet, side covers with front and back hinged doors with proper locking arrangement, rubber gasket on front and back to make it dust and vermin proof, powder coated , The cubicle shall have frame work, bottom & 45 CM long four legs of size 50 x 50 x 6 mm Angle iron, aluminium main busbar of 1.5 times to the rating of Incommer switch gear & for out goings 1.5 times of the individual switch gear duly sleeved with heat shrink sleeve colour coated for 3 Phase, 4 wire electric supply system and control wiring with multistranded PVC insulated copper wire size not less then 1.5 SQMM, complete comprising with following accessories all as specified and directed by the Engr-in-charge. (Note: Feeder pillar box shall be mounted on PCC 1:2:4 type B-1 (with 20 mm graded stone aggregate) foundation block of suitable size upto 40 cm above ground level complete all as specified and directed by Engr-in Charge. The cost of the PCC foundation shall be deemed to be included in the unit rate quoted for the item). ( Note:-All type Test Certificates and Design varification with switch gears ( ACB & MCCB) as per confirming to IS/ IEC: 61439/2011 Part-1 and part -2 with short circuit test at with 4000 Amps 65 KA, should be submitted by the contractor before executing the job). INCOMING:- (i) MCCB 4P 40 A, 10 KA with SPREADER Link -01 Set (ii) HIGH MAST light controls:- (iii) Contactor 32 A (AC3), 3P,- 01 No. (iv) Digital AstroTimer - 01 No. (v) Control MCB SP 6A- 03 Nos. (vi) MCBTP 16-32 A - 02 Nos. (vii) REV- FWD Starter, 05 HP:- (a) Contactor 12A (AC3), 3P,- 02 Nos. (b) OLR 5-8 A - 01 No. (c) Push button( ON/OFF, Rev/ Fwd)- 04 Nos. (d) Indicator UP/ DOWN- 02 Nos.

Supply and fixing of LED flood light Fitting 210 watt LED, suitable for mounting on High Mast Light structure, IP-65 protection, single peice pressure die cast aluminium housing high grade powder coated finish with heat resistant toughned clear glass cover for lamp and control gear compartment with high voltage surge protection device up to 5 KV, with bolts,nuts & washers complete all as specified and directed by Engr-in Charge.

Supply and fixing LED flood light 210 watt 230 V AC outdoor type with thermal management in multiple optics and equipped with IP66 protection, with impact and corrosion resistant complete with driver and lamp complete all as specified and directed by Engr-in Charge.

Supply, laying and testing cable XLPE insullated, screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) 1100 Volts grade with stranded aluminium conductor of size 35 Sqmm 3.5 core complete all as specified and directed by Engr-in Charge.

Supply and laying GI tubes light grade ISI marked , galvanized, 40 mm bore laid in trenches or under floor or fixed with poles/walls for protection of electric cable complete all as specified and directed by Engr-in Charge.

Material and Labour for Earthing complete with galvanized steel earth plate electrode of size 60cmx60cmx6 mm thick, buried directly in ground (earth pit not less than 2.1 m below normal ground level) with top edge of earth plate not less than 1.5m below normal ground level, connected to galvanized lead wire 4mm dia by means of bolts, nuts, check nuts and washers of galvanized iron or steel as shown in electrical plate No 3 of SSR Part I, connected to earth test point and the equipment on the other nuts and washers of galvanized ironsides complete all as specified, including testing and commissioning complete all as directed. Note : (a) The unit rates quoted against this item shall be deemed to include the cost of excavation and earth work in any type of soil, common salt & charcoal dust in alternate layers, PCC 1:3:6 as in pit, precast RCC 1:2:4 type B-1 with necessary reinforcement as in cover & frame for pit, funnel, watering pipe 20 mm bore GI pipe light grade, protection pipe 15 mm bore GI pipe light grade etc. (b) The quoted rates shall also deemed to include the cost of earth test point and earth strip/GI lead wire and protection pipe up to 7.5 meter beyond the earth plates electrode

S&L , jointing, testing and commissioning LT underground cables 1100 volts grade, cross sectional area XLPE insulated and PVC sheathed, heavy duty armored, with multistranded aluminum conductors, IS-7098 marked, laid in trenches complete all as specified and directed by Engr-in Charge. Note (a) Excavation, earth work ,cable protection (GI pipe) , sand fillings , cable joint shall be measured and paid separately under respective items of job.

25 Sqmm 4 core

Supplying & fixing of LED street light Fitting 70 watt LED, IP-66 protection, single piece pressure die cast aluminum housing high grade powder coated finish with heat resistant toughened clear glass cover for lamp and control gear compartment with high voltage surge protection device up to 4.5 KV, prewired conductor to fitting with 3 core 1.5 sqmm pvc insulated cable along with GI pipe bracket for street light fitting complete with 2.2 mtr long 50mm dia GI pipe medium grade and including necessary mild steel clamp , nuts, bolts and washers and painting on steel surfaces with two coats of aluminum paint complete all as specified and directed by Engr-in Charge.

Supply drawing, connecting and testing of 3 core, 1.5 Sqmm PVC insulated and PVC round sheathed copper conductor (flexible ) industrial cable, 1100 Volts conforming to IS 694 in steel tubular poles from KIOSK box to street light fitting including providing suitable copper lugs all as specified and directed by Engr-in-charge.

Earthing complete with galvanised steel earth plate electrode 60 cm x60 cm x 6 mm thick buried directly in ground ,(Earth pit not less than 2.25 meter deep below ground level) with top edge of plate not less than 1.5 meter below normal ground level ,connected to and including galvanised iron earth strip 25x4 mm by means of nut, bolts, check nuts and washers of galvanised iron or steel and provision of charcoal dust and common salt packed all around the earth plate including necessary excavation and earth work in any type of soil and testing complete all as specified and directed and shown in electrical plate number 3 of MES SSR part-I(1991) (a) Excavation and earth work for drilling hole for electrode in any type of Soil. (b) PCC pit in cement concrete 1:2:4 type B-1, Pre cast RCC cover with suitable handle 40 mm thick in PCC 1:2:4 type B-1, reinforced with welded steel wire fabric weighing not less than1.87 Kg/ Sq meter. (c) Funnel with watering pipe of GI 20 mm nominal bore light grade and lugs etc complete all as specified and directed (d) 15 mm nominal bore medium grade GI protection pipe 5 meter long for protection of earthing lead complete all as specified and directed. (e) Requisite quantity of common salt and charcoal. (f) Testing of earthing.

Supply errection in position & fixing of complete lighting system using raising and lowering type of high mast tower of 16 Mtr conforming to IS 875 Part III 1987 and suitable for 180 KM/hour wind speed for mounting lantern ring suitable for fixing of 120 watts LED fiood lights fittings 09 Nos(symmetrically fitted, including wiring from ground level to top of the mast, the mast should be motor operated for up and down, double drum carriage, double drum winch 6 mm 316 grade SS having rope of 7/19 with central core SS, construction trailing cable 3 core x 2.5 sqmm 1 No per mast up to height, foundation nut and bolt of suitable size hot dipped galvanized from special steel along with nuts and washers, anchor plates and template & circuit wiring with 10 sqmm copper wire, and power tool control, including RCC foundation as per manufacturers design and drawing complete all as specified & directed. (a) MAST STRUCTURE:- The high Mast shall be of continuously tapered, polygonal cross section polygon type (Minimum 16- Sides) of 15/16 Mtrs. in height presenting good visual appearance and shall be based on proven design to given assured performance, reliability and service. The Mast shall have an approximate top diameter of say 150 mm to 200 mm and bottom diameter of 350 mm to 450 mm, The weight of the Mast shall not exceed more than 1600 kgs, excluding weight of Luminaire, to maintain good elasticity of slender structure. (b) MAST CONSTRUCTION :- The Mast shall be fabricated from special steel plates of BS EN 10025 grade, cut and folded to form polygonal section and shall be telescopically jointed and fillet welded. The welding shall be in accordance with BS: 5135. The procedural weld geometry and the workmanship shall be exhaustively tested by the radiography on the Cpmplete welded and certificates submitted. The Mast shall be delivered in only 2 sections without any circumferential welding at site, which shall be joined together by slip-stressed-fit method. The joining shall be with stressing equipment, thus forming the sleeve joint. No site welding or bolted the joint will be accepted. The overlap distance shall have full penetration of longitudinal welds. The base plate of the mast shall be at least 25 mm. thick. An adequate door opening min 1400mm x 300mm shall be provided at base of each mast such as to permit clear access to equipment like winches, cable pug and socket, etc. The opening shall be complete with a close fitting vandal resistant, weather-proof door provided with a heavy duty lock. For metal protection of the Mast, the entire fabricated Mast shall be hot dip galvanised internally and externally, having minimum average thickness of 65 microns. (c) DYNAMIC LOADING:- The Mast structure shall be designed for an assumed maximum reaction arising from the maximum wind speed at Mendhar and measured at a height of 10 Mtrs. above ground level . The design life of the Mast shall be min. 25 years. Wind excited oscillation shall be damped by the method of construction and adequate allowance made for the related stresses. The offered High Mast shall be a tested design.

(d) FOUNDATION:- The tenderer shall see the site closely and minutely with regard to the nature of the soil, average depth of decomposed garbage and debris at proposed Mast locations and the other site conditions before working out the type of foundation and specifications for the proposed High Mast. The tenderer shall be responsible for the design of the foundation and safe erection and installation of the High Mast in mechanically and structurally safe working condition for the design life of the Mast as per manufacture design The load bearing (safe) capacity of the soil shall be indicted by purchaser to decide the type of foundation and its specifications. The holding down bolts shall be at least 20 nos. of high tensile strength and shall be supplied complete with anchor plate of 6 mm thick for casting into the foundation. The ensure correct vertically and horizontality of bolt alignment. (Note : Cost of foundation as per specification of manufacturer shall be deemed to be included in the rate quoted by the contractor) (e) LANTERN CARRIAGE:- The fabricated lantern carriages shall be provided for holding fittings and control gear provided on each High Mast. The lantern carriage shall be of special design and of durable steel tube construction designed to act as electric conduit with cable holes fully protected by grummets. The diameter of the lantern carriage shall be suitable so as to hold designed number of LED floodlight fittings, as specified in the tender design along with the control gear boxes and lantern. The lantern carriage shall be fabricated in three parts joined by bolted flanges with SS bolts with nuts to enable easy removal from the erected mast for replacement/ maintenance purpose. The carriage shall be supported/ suspended by three wire ropes for better stability. The lantern carriage Assembly shall not touch the lower surface of the Mast. The carriage design and fabrication shall be such that the lantern carriage will suit the lanterns and their control gear boxes to be used in the work. The Lantern Carriage shall be so installed that it does not cause any damage to the surface of the Mast and is provided with protective buffer arrangement. The complete Lantern carriage shall be hot dip galvanised after fabrication. The weather - proof cast aluminum junction boxes (IP-66) shall be provided on the Lantern carriage assembly from which the inter- connections will be made to the designed number of floodlight fittings and lanterns on the carriage.

(f) MECHANICAL ARRANGEMENT:- For installation and maintenance purpose, it will become necessary to raise or lower the lantern carriage assembly. To enable this, a suitable winch arrangement shall be provided in the base of the Mast, complete with top pulley, winch stainless steel wire ropes and winch driving power tool. (i) WINCH:- The winch shall be of completely self-sustaining type. the winches shall be of self- sustaining type by means of an oil bath and the lubrication shall be of recommended quality. Termination of the ropes of the winch shall be in such a way, that it does not involve distortion or twisting of the rope configuration. At least 6 turns of rope shall remain in tension on the drum even when the lantern carriage is fully lowered. the winch shall be designed to be installed or removed form the door opening at the base of the mast. The winch drums shall be grooved to ensure mechanically strong, stable and tidy rope lay with no chances of rope slippage or skippage. The winch shall be capable of operation by hand or by means of external power tool. Integrated power tool with worm is not acceptable. A test certificate shall be supplied along with each winch in support of the maximum load operated by the winch and for the safety of operation at the full load rotation. A handle shall also be provided for hand operation of the winches. (ii) TOP PULLEY ASSEMBLY:- The top pulleys shall be of a diameter, appropriately large enough to accommodate the steel wire ropes and the multicore electric cable. The material of construction of the pulley blocks shall be non- corrosive and made of dia cast (LM-6) aluminum alloy. The pulley assembly shall be complete with self lubricating bearing and stainless steel spindle. (iii) STAINLESS STEEL WIRE ROPES:- Stainless steel wire shall be AISC 316 grade 7/ 19 construction 2 Nos ropes for winch and 3 Nos for lantern carriage, 6 mm dia having a breaking load capacity of 2350 kg complete with stainless steel thimbles. The end for connection to the winch drum shall be fitted with thimbles and the thimbles shall be secured by copper compression splices.

(g) CABLE AND CABLE CONNECTIONS :- The connections shall be made with flat core flexible round sheath power cables of appropriate rating as per the schedule. The base compartment of the High Mast shall have one terminal box for terminating the incomer cable. The maintenance cables equal to that within the Mast and fitted with travelling cable 5 core 4 sqmm flexible having plug socket shall be provided to energize lanterns while in lowering position by hooking up at the base compartment socket supply. Similarly, the provision shall be made for electric supply at the base compartment to enable operation of the external power tool for lowering or rising of the lantern carriage assembly. The trailing cables of the lantern carriage rings shall be terminated by means of metal cased plug and socket provided in the base compartment to enable flexibility. (h) WINCH DRIVING POWER TOOL :- The electric driven tool shall be single speed, (1.2 Mt/min) reversible three phase & hand operated motor. The power tool shall be complete with very robust remote control switch such that the tool can be operated from safe distance of 5 Mtrs. There shall be and arrangement for self alignment off power tool which can be self supported during operation. Manual handle shall be provided for hand operation of the winches. The capacity rating and speed of the electric motor used in the power tool shall be specified by the tenderers. (j) LIGHTNING FINIAL & AVIATION OBSTRUCTION LIGHTS:- One number heavy duty hot dip galvanised lighting finial shall be provided for each mast. Suitable aviation obstruction lights of reliable design and reputed manufacturer shall be provided on top of each mast.

Note : Contractor should procure and provide 50 % of the material as listed above within 15 days of the placing of work order and shall be verified by the Engr-in-charge.

mayur enterprises (BID ID -3468806)

M/S ADHIKARI CONSTRUCTION CO. (BID ID -3468981)

Vijay Electricals (BID ID -3469580)

Ridhi engineers and builders (BID ID -3469024)