Extending a circuit using smaller wire size


Old 12-31-06, 02:09 PM
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Join Date: Dec 2006
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Extending a circuit using smaller wire size

My house uses #12 wire with 20 amp breakers. Can I add a 20 ft lighting extension (2-100w outside flood lamps) from an existing outlet box using #14 wire? Wire will be housed in PVC conduit with pvc box at the end for the light fixture.
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Old 12-31-06, 02:17 PM
Join Date: Oct 2005
Location: Milwaukee WI
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If you use 14 AWG, you must change the breaker to 15A.

If you use 12 AWG, you can leave the breaker at 20A.

Local codes may vary, but I am not aware of exceptions to this rule.
Old 12-31-06, 02:39 PM
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Nope. Never heard of local codes overriding NEC. Adding to,Yes.
Run #12 only.

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