The term busbar is derived from the Latin word omnibus[citation needed], which translates into English as "for all", indicating that a busbar carries all of the currents in a particular system.

They are generally uninsulated, and have sufficient stiffness to be supported in air by insulated pillars. These features allow sufficient cooling of the conductors, and the ability to tap in at various points without creating a new joint.

Busbars are produced in a variety of shapes, such as flat strips, solid bars, or rods, and are typically composed of copper, brass, or aluminum as solid or hollow tubes. Some of these shapes allow heat to dissipate more efficiently due to their high surface area to cross-sectional area ratio. The skin effect makes 50–60 Hz AC bus bars more than about 8 millimetres (0.31 in) thickness inefficient, so hollow or flat shapes are prevalent in higher current applications. A hollow section also has higher stiffness than a solid rod of equivalent current-carrying capacity, which allows a greater span between busbar supports in outdoor electrical switchyards.

RMC offers Bare Bus Bars made of copper and Aluminum are provided as per the cross sections provided by the customers or the calculation is made at the rate of 1 Amp per sq mm and 1.60 Amp per sq mm in the case of aluminum and copper respectively. The bus bars used are EC Grade with proper certificates. The terminations may be provided with normal bolts or with flying Nuts.



  • Have low resistance.

  • High mechanical strength in tensile. Compressive strength and tear strength.

  • Fatigue Failure of high resistance.

  • The low resistance of the Surface Film.

  • Cutting and bending mobility.

  • The high corrosion resistance.

  • Low price.

Considering all of these features can be seen that copper is the metal best suited for use as busbars and aluminum metal as the next.


Type of copper bars

The industrial products standards of bar copper are divided into 3 categories.

  •  Annealed type

  • Half - hard type

  • Hard type

Applications of Busbar

Some of the basic applications of Busbars include:

    1. Industries
      1. Hospitals
        1. Power Plants
          1. Data centers
            1. Laboratories
              1.  Apartments
                1. Retail facilities



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