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Why does the QOGP3O6036 Generator panel utilize a 3 pole breaker to switch from utility to generator?

Issue:
Product Design Features

Product Line:
Canadian QO Generator Panels

Environment:
Factory installed breakers

Cause:
Application

Resolution: 
 

The basic reason is because, the Canadian Electrical Code requires the Neutral Conductor to be 'SWITCHED' with the Line Conductors for a Utility/Generator application. Therefore, the 3pole breakers are used to allow both line conductors and the neutral conductor to be Switched (or turned ON and OFF) when switching between Utility and Generator Power.
 
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