supply and delivery of electrical items to south malda division, wbsedcl supply and delivery of 4000 nos of porcelain shackle insulator, 4000 nos of d iron clamp, and 4000 nos of porcelain guy insulator (ht) to the divisional store, south malda division, wbsedcl, located in the district of malda, wb , supply and delivery of electrical items , supply and delivery of porcelain shackle insulator (3” x 3.5”) specification: the insulator would be installed on 433 volts and 50 hz ac system in which the neutral is effectively grounded. the insulator shall be suitable for use with acsr conductor up to 30 sqmm. the porcelain used shall be sound, free from defects, thoroughly vitrified and smoothly glazed. the glaze on the insulator shall be white / cream in colour, except for the screw threads. the insulators shall conform to provisions under is 1445 – 1977 & the latest revision thereof. , supply and delivery of porcelain guy strain / stay insulator, designation – c specification: nominal system voltage (rms): 11000 v; length (in mm): 140; diameter (in mm): 85; cable hole diameter (in mm): 25 ± 1.5. the porcelain used shall be sound, free from defects, thoroughly vitrified and smoothly glazed. the glaze shall be brown in colour. the insulators shall comply with is: 5300-1969 & the latest revision thereof. , supply and delivery of “d” iron clamp (3” x 3.5”) (suitable for fixing of porcelain shackle insulator) specification: made up of 30 mm x 6 mm strap (as depicted in the drawing attached with the niet). suitable for fixing of porcelain shackle insulator (3” x 3.5”)