No Power Bedroom Circuit After Rewire Decision Tree

Why this matters

A bedroom circuit dead after a partial rewire is the most common callback in a remodel where the electrician pulled new home-run cable but did not fully demolish the old circuit. The new circuit looks correct at the panel, the new outlet works, but the homeowner reports that the ceiling fan or a single receptacle is dead. The cause is almost always a missed splice in a box that was supposed to be abandoned but is still feeding a tap; or a downstream device that depended on a feed-through from the old circuit. NEC 2023 Article 300.15 requires every splice to be in an accessible box, and missed buried splices are both a code violation and a fire risk.

Symptom presentation

Walk the circuit at the meter. Which devices on the homeowner's list are dead? Which are live? Map them on paper. Often the live devices were re-fed from the new home run and the dead devices were left on the old, now-orphaned, feed.

Confirm with a non-contact tester. Energize the new circuit; the new devices read live. The reported-dead devices read dead. Read voltage at the dead devices with a real meter; some "dead" devices are actually energized but with an open neutral, which can be confusing for homeowners and rewards a careful meter check.

Quick checks

Pull the new panel breaker. With the new circuit dead, walk the rooms with a tone generator and probe. Inject tone on one wire of the new home run; trace where it reaches and where it stops. A boundary in the wall identifies the location of the missed splice or the abandoned tap.

Look in attic, basement, and crawlspace for junction boxes that should have been re-fed. The old circuit's path typically went through a junction box at a structural soffit, in the attic above the bedroom, or at the basement ceiling. A box that the rewire missed may still be in service feeding the dead devices through the original conductors.

Open every accessible junction box on the path. Look for capped-but-not-removed conductors, splices that don't make sense, and dead-end taps that were never severed. NEC 110.14 requires all splices to be terminated properly; an open splice on a presumed-dead conductor is a hazard.

Isolation tree

Path 1: missed splice in attic or wall. The new home run was pulled to one device but the homeowner thinks the new home run "fed everything in the bedroom." Often the original installer fed everything through a feed-through receptacle (loop in, loop out on the screws). The new home run replaced one of those wires but not the other, so the downstream devices are still on the old, now-dead, conductor. Find the box where the swap happened and re-connect using the new feed.

Path 2: abandoned but live tap. The old circuit was killed at the panel but the breaker still feeds an attic junction box that taps to the dead devices through an old splice. Find the orphaned tap by walking the original cable run from the dead device back toward the original panel breaker location.

Path 3: AFCI nuisance after rewire. The new home run lands on an AFCI breaker which trips on first energize because of a leakage path on the old conductors that were not properly severed. Symptoms: AFCI trips on reset. Standard AFCI nuisance-trip workup applies.

Path 4: home run lands on the wrong panel space. The new home run was landed on a spare breaker that was never wired up at all, or on the wrong phase, or on a breaker that is OFF and labeled as something else. Read voltage at the home run leaving the panel; zero V means the breaker is bad or off.

Path 5: dead device is on an MWBC and lost its neutral. The remodel changed one cable but the MWBC needs both hots and the shared neutral. If the new install only addressed one of the three conductors, the other half is dead. See the MWBC AFCI tree for full discussion.

Confirming diagnosis

Tone-and-trace verifies the missed splice. If you find a box that needs the new conductor connected, make the splice per NEC 300.13(B) and re-energize. The dead devices should come back.

If you cannot locate the box from inspection alone, an inductive cable tracer (Greenlee Tempo or Klein VDV500) will identify the routing of the dead conductors from a device back to the breaker. Where the trace shows a path entering a wall but not exiting at the panel, the missed splice is in that wall section.

Remediation

Re-make all splices in accessible junction boxes per NEC 300.15 and 300.13(B). Cap and label any orphaned conductors that you cannot follow to a clear endpoint; better is to remove them entirely back to a junction. Update the panel directory to reflect the actual circuit count and the actual devices on each.

If a fully-abandoned cable section exists in a wall, NEC 590.4(D) does not directly govern (that is for temporary) but good practice is to demo the abandoned conductor back to the nearest accessible junction or to remove from the building. Leaving dead wire in a wall is allowed if properly terminated at both ends in accessible boxes, but it creates confusion for the next remodel.

Document the rewire fully with a panel directory, a one-line diagram, and photos of the junction boxes where splices were made. The remodel scope expanded once; the next homeowner should not have to chase it again.

References

• NEC 2023 Article 300.15 (Boxes and Conduit Bodies Required at all splice locations), 300.13(B) (continuity of grounded conductors), 110.14 (Electrical Connections), 408.4 (panel directory required)
• NFPA 70B 2023 Chapter 11 (post-remodel verification testing)
• UL 467 (Grounding and Bonding Equipment)
• Klein Tools Inductive Tracer Operating Guide (cable identification in concealed walls)