When we bought the Cape, the kitchen had two light fixtures, and both looked like they came with the 1994 cabinets. In the middle of the ceiling hung a big rectangular fluorescent box with a yellowed plastic lens that buzzed for a few seconds before it came on. Over the sink was a frosted glass dome holding a decade of dead bugs. Tessa picked replacements in January. Today, a Saturday, I finally put them up, and the first one taught me something about whoever worked on this kitchen before us.
Power off, then prove it
Our panel directory is in the previous owners' handwriting, and two breakers say "Kitchen." I flipped the first one, then turned on the wall switch to make sure the fluorescent was dead. It was. Then I took the lens off, dropped the fixture and touched the Klein non-contact tester to every wire in the hole, not only the ones attached to the light.
One of them chirped. There were two cables coming through the ceiling, not one, and the second was still live. It fed the outlet by the back door and ran off the other breaker marked "Kitchen." Off went that one too, and the tester went quiet on everything. I've done enough of these that testing every wire sometimes feels like overkill. Today it wasn't.
The box that wasn't there
With the fluorescent down, I was looking at a ragged hole in the plaster about the size of a fist, two cables coming straight through it, wire nuts wrapped in electrical tape and nothing else. No junction box. The old fixture had been held up by two long screws driven into the wood lath, and the splices had lived inside the fixture's metal housing.
The good news was the cable itself: plastic-sheathed, with a ground wire, not the old cloth-covered kind. It probably went in when the kitchen was redone in 1994, and whoever did it simply skipped the box. If I'd found brittle cloth insulation or anything scorched, the plan would have changed: cap the wires, leave the kitchen on a lamp and call an electrician. That's my line for anything that looks like it's been cooking.
Splices belong inside a box, so the plan was to put one in.
An old-work box in a plaster ceiling
An old-work ceiling box is made for a finished ceiling. You cut a hole, feed the cables in, push the box up, and tabs clamp it to the ceiling from behind. What matters for a light is that the box is rated for the fixture. The one I bought, $14, is rated for a lot more than our new flush mount, which weighs about five pounds. A heavy fixture or a ceiling fan would need a box fastened to framing or a brace, and if Tessa had picked something heavier, that's where I'd have gone.
I traced the box on the ceiling, centered on the old hole, and cut the plaster slowly with the oscillating multi-tool while Tessa held the shop vac nozzle under the blade. Moose left the kitchen the moment the vac started and was found later under our bed. One strip of lath sat right where the box had to go, so I cut it out with the same tool, blade angled away from the cables. My one slip: where the lath shifted, the cut wandered about an eighth of an inch past my line on one side.
Cables in through the box's clamps, box up into the hole, tabs tightened. Solid. Because the pass-through cable meant more wires than a plain light box, I checked the box's rated capacity against the conductor count. Inside the limit, barely. Then the fixture: ground to ground, white to white, black to black, the pass-through splices tucked in with the rest and everything folded behind the mounting bracket.
The sink light was almost boring. It had a real box, the new fixture went up in twenty minutes, and the worst thing in it was the bugs.
Cost and what's left
The two fixtures were $178: a flush-mount LED for the middle of the room and a small semi-flush light over the sink, both Tessa's picks. Plus the $14 box. The new canopy covers my wandering cut and the grimy outline the old fluorescent left on the ceiling, with about a quarter inch to spare.
The panel directory now says "Kitchen lights and back-door outlet" next to the old labels, in my handwriting. The kitchen is bright enough at night that Tessa says she can finally see what the counters look like, and isn't sure that's an improvement.
Trip count: 2.
