15 amp circuits

Old 06-07-01, 07:49 PM
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I have 20 amp circuits in my home. Some of the outlets in the rooms are 15 amp. Is there a problem with this?
Old 06-07-01, 08:25 PM
Join Date: May 2001
Location: USA
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Generally, it is OK as long as there is more than one outlet on the circuit.
Old 06-08-01, 06:52 PM
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It is allowed by the NEC to install 15 amp rated receptacle and switches on a 20 amp circuit. Just make sure all wiring on that 20 amp circuit is 12 ga. and not 14 ga. If you find 14 ga wiring on that circuit that has a 20 amp breaker controling it then you must reduce the breaker size to the smallest conductor ampacity rating on that circuit. If you started with 12 ga / 20 amp rated wiring and you install one piece of 15 ga / 15 amp rated wiring on that circuit you must protect that circuit with a 15 amp breaker rated to protect the smallest wire of that circuit.

However devices [switches and duplex receptacles] are allowed in a dwelling to be 15 amp rated even though you have 12 ga / 20 amp rated wiring and a 20 amp breaker.

Good Luck


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