When it comes to selecting busbar trunking systems, the process is refreshingly straightforward, thanks to the comprehensive data provided by manufacturers. Unlike traditional distribution systems with cables, busway selection doesn’t require complex considerations like installation methods, insulation materials, or correction factors for grouping. This technology simplifies the power distribution process.

The key determinant for the cross-sectional area of a specific busbar trunking model is determined by several critical factors:

  • Rated Current: The manufacturer calculates the cross-sectional area based on the rated current of the system. This is a fundamental parameter, and the selection process takes into account the layout and the current absorbed by various loads connected along the trunking system.
  • Ambient Temperature: Typically, busbar trunking systems operate at an ambient air temperature of 35 °C. However, if the operating environment exceeds this temperature, a correction factor must be applied. Manufacturers provide the specific correction factors applicable. For example, Schneider Electric, known for their medium and high-power range systems (up to 4000 A), offers correction factors to ensure accurate sizing.

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Article with all rights reserved, courtesy of Electrical Installation