REPAIR AND MAINTENANCE OF LIGHTING ARRESTOR, EARTHING AND TESTING AT POWAI, WORLI, CGSD MANKHURD UNDER GE DAMAN.

Amount

Material and labour for earthing complete with galvanized iron earth plate electrode 600 mm x 600 mm x 6 mm thick buried directly in ground (earth pit not less than 2.25 m deep below normal ground level) with top edge of the plate not less than 1.5 m deep below normal ground connected to galvanized steel strip 25 x 4 mm size by means of bolts, nuts, check nuts and washer of galvanized steel, watering pipe of 20 mm bore, galvanised iron, light grade, and 40 mm bore galvanised iron light grade for earth strip protection including all excavation earth work in any type of soil, PCC pit in PCC 1:2:4 type B-1 (using 20 mm graded stone aggregate) and RCC 1:2:4, type B1 (using 20 mm graded stone aggregate) for precast chamber cover 50 mm thick, reinforced with welded steel wire fabric or XPM Jali (weight not less than 4.00 Kg / sqm), with charcoal, salt, funnel complete all as shown in the electrical plate No 3 of SSR part –I and testing of earthing on completion complete all as specified & directed. Note:- Quoted rates shall be deemed to include for earth strip with protection pipe up to 7.5 M length, removal and refixing of existing interlocking tiles/PCC required for earthing strip connection to earthpit and making good.

Material and labour for earthing complete with copper earth plate electrode 600 mm x 600 mm x 3.15 mm thick buried directly in ground (earth pit not less than 2.25 m deep below normal ground level) with top edge of the plate not less than 1.5 m deep below normal ground connected to copper strip 20 x 3 mm as earthing lead by means of bolts nuts check nuts and washer of copper, watering pipe of 20 mm bore galvanised iron light grade and 40 mm bore galvanised iron light grade for earth strip protection including all excavation earth work in any type of soil, PCC pit in PCC 1:2:4 type B-1 and RCC 1:2:4, type B1 for precast chamber cover 50 mm thick, reinforced with welded steel wire fabric or XPM Jali (weight not less than 4.00 Kg / sqm), with charcoal, salt, funnel complete all as shown in the electrical plate No 3 of SSR part –I and testing of earthing on completion complete all as specified & directed. Note:- Quoted rates shall be deemed to include for earth strip with protection pipe up to 7.5 M length, removal and refixing of existing interlocking tiles/PCC required for earthing strip connection to earthpit and making good.

Material and labour for test point termination block made of Gun Metal or phospherous bronze 75mmx75mmx25mm of 6mm thick and screwed including 3 nos 8mm dia 25 mm long hex head screw complate with all fixing arrangements complete all as specified & directed.

Supply and fix copper strip of size 20 x 3 mm with epoxy insulators and fixing screws etc for earth continuity conductors to test point terminal including taking down old strip complete all as specified & directed.

Supply and fix galvanised iron strip of size 25 x 4 mm with epoxy insulators and fixing screws etc for earth continuity conductors to test point terminal including taking down old strip complete all as specified & directed.

Supply and fix galvanised iron strip of size 32 x 6 mm with epoxy insulators and fixing screws etc for earth continuity conductors to test point terminal including taking down old strip complete all as specified & directed.

M&L for preparation of old plastered surface earthing chamber & RCC cover and applying two coat synthetic enamel paint over one coat primer and writing equipment name (2 cm height letter) with black synthetic enamel paint complete all as specified & directed.

Supply & fix epoxy insulators with necessary fixing arrangements on wall/roof etc complete all as specified & directed.

M & L for Air termination , single pointed aluminium rod 12 mm dia and 300 mm long complete with all fixing arrangement with earth contunity strip of any type including all nut bolts and washers etc complete all as specified & directed.

Supply and fix aluminium strip of size 25 x 3 mm with epoxy insulators and fixing screws(cadmium plated screw and nuts) etc for earth continuity conductors to test point terminal including taking down old strip complete all as specified & directed. Note : Contractor supervisor to report on daily basis to the concerned JE as detailed by the Engr-in-Charge on daily basis to collect the complaints in morning by 9.15 am on working days, supervise the work and again report to AGE/JE in evening by 4.45 pm to submit the progress and details. In case of absence of supervisor penalty will be imposed at the rate of Rs.1200 per day.

Shree Ayyappa Engineering