Garage Floor Light Switch Box at the Stairs
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Photo Details
- Date: June 19, 2026
- Time: 9:04 PM EDT (filename UTC
2026-06-20 01:04→ −4h rolls back to June 19 local) - Weather: Clear June night, ~60°F. Evening session in the still-unconditioned garage.
- Phase: 120V electrical rough-in — garage floor (bay) lighting 3-way
- Location: 309 E. 7th St., Clare, MI
- View: Open 2-gang box at the stairwell, device + splices visible before make-up/closing
Description
The stairwell-side switch box for the garage floor (bay) lights — the power-distribution hub from the 3-way diagram. The left gang has the garage-floor-light 3-way toggle installed (Leviton, 15A-120 VAC). The right gang is open, reserved for the stair-lights 3-way switch (its 14/3 run not yet installed).
Cable inventory at this box
| Cable | Role | Conductors |
|---|---|---|
| 12/2 #1 | Power IN from the panel | Black = line hot → 3-way common; White = neutral; ground |
| 12/2 #2 | OUT and up to the light | Black = switched hot (to the fixture); White = neutral; ground |
| 12/3 | To the garage-door entrance switch (the other 3-way) | Black + Red = travelers; White = switched-hot return, re-identified with black tape (NEC 200.7(C)(2)); ground |
Make-up summary: the panel line hot (12/2 #1 black) lands on the stairwell 3-way common; black/red of the 12/3 are the travelers to the entry-door switch; the re-identified white (hot) from the 12/3 Wago-splices to the black of 12/2 #2 to carry switched power up to the light; the two neutrals (12/2 #1 + #2 whites) splice together; grounds splice together. (Neutral does not pass through the switch.)
⚠️ Observed Issue — Not-Fully-Latched Wago (fix scheduled)
In this photo the Wago lever nut holding the “hot white” (black-taped switched-hot to the light) is not fully closed. A partially-closed lever is a loose connection — it heats under load and is a fire risk once buried behind drywall. The lights are currently running through it, so it’s making only partial/intermittent contact.
Fix (owner, next day): fully latch the lever and verify the conductor is stripped to the 221 strip-gauge (~11 mm — no bare copper past the housing, and no insulation caught in the jaw, which is the usual reason a lever won’t fully seat); tug-test every conductor. Then either re-dress the connectors so the levers face back/inward and can’t snag when the device is pushed in, or tape the closed-and-tested levers shut for retention (see below). If a lever still won’t stay latched or the wire pulls out when closed, replace that connector rather than reusing it on a buried splice.
Wago lever nuts — taping for retention, and the lever-lift failure mode
Wago 221s are a complete UL-listed connector and don’t need tape for the electrical connection. But there’s a real mechanical failure mode: a lever can catch and lift while stuffing a crowded box (folding the conductors in and pushing the device back) — which is exactly what happened here. Two fixes, in order of preference:
- Dress to prevent snags (root-cause fix): orient the levers facing the back/inward, accordion-fold the conductors behind the device, and keep box fill reasonable so you’re not force-cramming.
- Tape closed levers (belt-and-suspenders): it’s acceptable to wrap levers that are already fully closed and tug-tested, locking them shut during stuffing. Always tug-test before taping (never tape an unverified splice); it makes future service slightly harder. Neither required nor prohibited by code.
Defective vs. install error: genuine Wagos rarely fail. A lever that won’t stay closed is almost always under-closed or has insulation caught in the jaw (re-strip to the gauge and retry). If it still won’t latch, feels loose/cracked, or the wire pulls out when “closed,” discard it and use a fresh one — they’re cheap, and a buried splice is no place to nurse a suspect connector. Also worth confirming they’re genuine Wago, not an Amazon look-alike. The black-tape re-identification on the white-as-hot is a separate, required marking — keep that regardless.