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Discussion Starter #1
I recently purchased a house. At some point, someone remodeled it. The house was originally wired with 14/2 wire. When the remodel happened, someone tied into the existing circuits with 12/2 wire.

Now I have both 14/2 wire and 12/2 wire on the same circuit that is hooked into the panel with a 15amp breaker. Should I change the breaker to a 20amp on that circuit?

Also, is there anything in a residential build that requires a 15amp breaker? Or would it be okay to have all 20amp breakers in my panel?

Thanks for the help!
 

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retired framer
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I recently purchased a house. At some point, someone remodeled it. The house was originally wired with 14/2 wire. When the remodel happened, someone tied into the existing circuits with 12/2 wire.

Now I have both 14/2 wire and 12/2 wire on the same circuit that is hooked into the panel with a 15amp breaker. Should I change the breaker to a 20amp on that circuit?

Also, is there anything in a residential build that requires a 15amp breaker? Or would it be okay to have all 20amp breakers in my panel?

Thanks for the help!
If any part of circuit has 14g , you have to stay with 15 amp breaker.
 

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Discussion Starter #3
Okay, so I had it backwards in my head.

Is it dangerous to have 14g and 12g wire on the same circuit with a 15amp breaker?
 

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retired framer
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Okay, so I had it backwards in my head.

Is it dangerous to have 14g and 12g wire on the same circuit with a 15amp breaker?
No, 14 g is smaller than 12 gauge , adding more amps to the 14 would be dangerous.
 

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14 gauge wire can overheat if on a 20 amp breaker. Use a 15 if any part of the circuit is 14 gauge. You can have all 20 amp breakers as long as no wire is smaller than 12 gauge. It appears that you don’t have that scenario.
 
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