I'm hooking up a designated line for my frige. I was thinking of using 12-2 wire with a 20 amp breaker. Is the 20 amp breaker over kill or should I use the 12-2 with a 15 amp breaker
For a refer you can use a dedicated 15A circuit using #14 wire or a 20A circuit using #12 wire.
I see you have several posts asking similar things. The breaker protects the circuit, NOT the appliance. So there is NO reason to undersize the breaker.
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dedicated circuits for a dwelling:
dining room circuit 20 amp. kitchen countertops - one 20 amp per three receptacles. refrigerator - one dedicated 20. disposal and dishwasher can share one 20 amp circuit. island if you have one - one 20 amp circuit. microwave - one 20 amp. lighting can be on a 15. clock hanger - one 15 shared. range igniter can share a circuit off the lighting.
dedicated circuits for a dwelling:
dining room circuit 20 amp. kitchen countertops - one 20 amp per three receptacles. refrigerator - one dedicated 20. disposal and dishwasher can share one 20 amp circuit. island if you have one - one 20 amp circuit. microwave - one 20 amp. lighting can be on a 15. clock hanger - one 15 shared. range igniter can share a circuit off the lighting.
Most of these are generally rules-of-thumb and not code requirements.
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