Do Arc Fault Breakers need to have a dedicated neutral in oder to work?

Yes, you wire just like GFI's. If bedroom was having ARC fault installed in older house. You may need to pull a neutral to where a multicircuit seperates(if 2 circuits are sharing the same neutral) So the neutral load is separate for that circuit only, not a circuit sharing that neutral.

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Originally Posted by Stratmando

Yes, you wire just like GFI's. If bedroom was having ARC fault installed in older house. You may need to pull a neutral to where a multicircuit seperates(if 2 circuits are sharing the same neutral) So the neutral load is seperate for that circuit only, not a circuit sharing that neutral.

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Thank for the answer!:)