Rising Mains of Electrical

         Totally enclosed Rising mains are with aluminium bus - bars or Copper bus-bars in suitable sections which are connected to make a vertical run. Each sections is provided with a number of wall straps for fixing  the  rising mains to the wall. The trunking consists of side channels of 14 SWG MS sheet and front and rear cover of 16 SWG to form totally enclosed metals clad construction.
         The bus-bars of rectangular sections of wrought aluminium with a current density not exceeding 1.25 A per squire mm and are individually insulated with a non-deterioating material so as to prevent  any possibility of electrical fault due to presence of vermin. The aluminium bus-bars conform to IS 5082 -1969 grade 9-1 EQP. The total run in sectionalized and each section is fitted with a thrust pad to prevent the bus-bars from sliding downwards. Each section also has an expansion joint to take up expansion of that section. 

2500 A bus -bars


 Bus bar rising arrangement 












        Connections between each length are adequately insulated and the casing is provided with earth link between each length to provide earth continuity throughout the run of the rising mains.
         Solid risers are provided wherever required for tap - off arrangements and are suitable connected to the outgoing Tap-off boxes. The top end of the Rising main is closed by a blank -end cover and it is possible to extend the mains easily at a late stage if desired. 
        Wherever the rising mains pass through a floor a fireproof  barrier is provided. The sheet steel oxide primer before painting.
         The Rising mains are subjected to a high voltage test of 2.5 kv for one minute between each phase and between each phase and neutral.
         The Rising mains are suitable for 415 volts, 3 phase, 50 Hz, 4 wire system and have successfully tested for a 2.5 MVA short-circuit capacity at CPRI Bangalore.
         The fixing of the rising main will be done by fixing a suitable sixe of angle iron bracket of 50 mm x 50 mm x 6 mm size angle iron duly painted with synthetic enamel paint to match the colour of rising  main. The grouting of the ngle iron bracket will be done as to withhold the total load of the rising main and sliding of the same downward.



Bus-Bars Name Plate
3200 A  Cu bus-bars 





















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