Run Electrical Wire

What happens here

After installing the old work box, run a 14/3 Romex wire from an appropriate power source (e.g., an existing light fixture circuit or a new circuit from the electrical panel) to the newly installed old work box. Ensure that the circuit is 15 amp, as residential smoke detectors typically require a 14-gauge wire for this amperage.

Goal: Run 14/3 Romex wire to the old work box