While bus bars offer exceptional efficiency and tidy power distribution, they also present several notable disadvantages depending on the installation environment. A primary drawback is their rigid physical nature, which makes them inflexible and difficult to modify, reconfigure, or route around complex architectural obstacles once manufactured. Additionally, if a bus bar is improperly sized, bolted loosely, or exposed to moisture, it can develop high-resistance joints that generate extreme localized heat, leading to arcing and thermal failure. They also require meticulous insulation planning to prevent accidental short circuits when working inside tight metallic enclosures.
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