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How to determine if a BAB Breaker with Switching Neutral can have a shunt trip added to it?

The switching neutral breaker can have a shunt trip added to it. Take the switching neutral part number and add the shunt trip suffix code to it. The switching neutral and the shunt trip will both add an extra pole to each breaker. Example: BAB2020CS is a single pole twenty amp breaker with a switching neutral and a 120Vac shunt trip and will be three poles wide.