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Why can`t a QO2200 be installed in a 3-Phase loadcenter?

The QO2150, QO2175 and QO2200 branch circuit breakers are two pole breakers that are physically four poles wide and connect to four adjacent connector fingers in the load center. They connect to four connector fingers to adequately carry the higher ampacity. If these branch breakers would be installed in a 3-phase load center, a phase to phase short circuit would be created.

CTA-ID : 2027243
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