What Is a Switched Outlet? (Why Half Your Outlet Is Dead)
If a wall switch seems to do nothing — or only half an outlet has power — you probably have a switched outlet, where a switch controls a receptacle for a lamp. Here's how they work and how to change one.
Written by Steven Rotan
Licensed Journeyman Electrician — Oregon #883LR
Here's a "problem" that isn't actually a problem: you find an outlet where only half works, or a wall switch that seems to control nothing. Nine times out of ten, that's a switched outlet — and it's wired that way on purpose.
What a switched outlet is
In many living rooms and bedrooms, builders skip the ceiling light and instead wire one receptacle so a wall switch controls half of it. The idea: plug a lamp into the switched half and turn it on from the doorway like a light. So:
- One half is always hot (for a clock, charger, whatever).
- The other half is switched (for the lamp).
If the switch is off, that half is "dead" — but it's doing exactly what it was designed to do.
How it's wired
A receptacle has a small breakaway tab joining its two brass (hot) terminals. Normally both halves share power. To make a switched outlet, the installer snaps out that tab, then feeds one half from the always-hot wire and the other half from the switch. That's the whole trick: the broken tab lets the two halves be powered separately.
Why your switch "does nothing"
If a wall switch appears to control nothing, walk the room and find the outlet whose top or bottom turns on and off with it. That's its job — it's a switched outlet, not a broken switch.
Changing it
With the power off and the outlet's wiring understood:
- Want both halves always on? Reconnect the two hot halves (pigtail them or replace the tab) so both are hot all the time. The switch then does nothing — you can leave it or repurpose it.
- Want the switch to control the whole outlet? Rewire so both halves are fed from the switched wire.
The key is knowing which incoming wire is the always-hot and which is the switched leg before you rearrange the terminals. Take a photo first, and test with the power on (carefully) if you need to identify them — or have an electrician sort it in ten minutes.
Bottom line
Half a dead outlet plus a "useless" switch is the classic switched-outlet setup — intentional, common, and easy to change. Understand which wire is switched and which is always hot, kill the power, and you can make it always-on or fully switched to suit the room.
Frequently asked questions
Why is only the bottom (or top) half of my outlet dead?
That's a switched outlet with the tab between the two halves broken off, so each half is fed separately: one half is always hot, the other is controlled by a wall switch (for a lamp). If the switch is off, that half is dead. It's not broken — it's wired that way on purpose. Many living rooms and bedrooms have one.
My wall switch doesn't seem to control anything — is it broken?
Often it controls a switched outlet, not a light. Look for a receptacle in the room where one half turns on and off with that switch. Builders frequently install a switched outlet instead of a ceiling light in living rooms and bedrooms, so you can switch a lamp from the door.
Can I make a switched outlet always-on (or the whole thing switched)?
Yes. Inside the outlet, there's a small breakaway tab connecting the two brass (hot) terminals. If it's broken to create the split, reconnecting the halves (or re-tabbing) makes both always-hot, or you can rewire so the switch controls both halves. It's a simple change with the power off — just understand which wire is switched and which is always hot before you rearrange them.
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