Flickering lights: Is It A Bad Breaker?
Your kitchen light flickers every time somebody runs the microwave. Not much. Just enough that you notice, and now you can’t stop noticing.
You’ve put in a new bulb. Maybe two. A bad breaker can cause that. Honestly though, it’s rarely my first guess on calls around Newark.
What Goes Wrong Inside a Breaker
Inside your panel, each breaker snaps onto a metal bar, and everything on that circuit runs through one spring clip. Forty-odd years of warming up and cooling down, and the clip gets lazy. Current starts jumping a tiny gap instead of riding solid metal. That’s arcing, and it’s how a bad breaker makes a light sag for half a second and come back.
You’d only see it on one circuit, though. If the bedroom lights act up and the hallway’s fine, think circuit, not house.
A lot of Newark houses went up in the ’60s and ’70s, and plenty still have the original panel. If the label on yours says Federal Pacific Stab-Lok or Zinsco, I’d want to look at it anyway. Those breakers have a bad habit of not tripping when they’re supposed to.
What It Usually Turns Out to Be
Most of the time, it’s the circuit, not the breaker. Somebody wired the kitchen lights and the microwave outlet on the same run, and a full-size microwave pulls 12 amps or more the second it starts. That much draw sags the voltage on everything sharing the wire, and the lights show it first.
Run a toaster or coffee maker off the same counter and you can push a 15-amp circuit past what it’s rated for. Sometimes the breaker trips. Sometimes it just holds on while the lights keep dipping, which looks a lot like a bad breaker from the outside.
Current code keeps kitchen countertop outlets off the lighting circuits, but plenty of older kitchens were wired before anyone was that picky. The fix is usually a dedicated circuit for the microwave, not a new breaker.
When I Do Blame the Breaker
Last summer I got a call from a woman in Meadowood. Kitchen lights dimming on and off for two weeks. She’d already bought new bulbs and had her son-in-law put in a new switch. Didn’t help.
I took the cover off, and the 20-amp breaker for the kitchen was warmer than the ones next to it. The plastic around the screw terminal had gone a little tan. That wire had been loose a while.
Those are the two things I look for, trouble on one circuit and a breaker running warmer than the rest. Sometimes there’s a buzz you only catch at night, too.
When I see that, I treat it as a bad breaker until testing says otherwise. The swap’s usually under an hour. The slow part is the wire. If the burnt end doesn’t get cut back, the new breaker cooks the same way.
What’s Safe to Check Yourself
Some of this you can handle. Let the bulb cool, then make sure it’s snug. Try a different LED, and if the light’s on a dimmer, get one marked dimmable.
For a few days, jot down which lights blink and what was running at the time. Sounds silly. Saves me a lot of time.
You can reset a tripped breaker once. If it trips again, leave it off.
Don’t take the panel cover off, though. Even with the main shut off, the big wires coming in from the meter are still live. I’ve got a screwdriver with a melted tip that proves it.
Inside Newark city limits, panel and wiring changes also have to meet the National Electrical Code and get inspected under a City of Newark permit. A licensed electrician pulls that permit. A handyman usually won’t.
Getting It Checked
A loose connection is making heat every day you leave it, and heat is how panel fires start. We test before we swap anything, so you don’t pay for parts you didn’t need or miss the bad breaker you did. That’s fixed right the first time, for professional breaker and fuse replacement. Call (302) 368-3848.
Stuff People Ask Me
Can a bad breaker make just one light flicker
Not usually. A breaker feeds the whole circuit, so a failing one tends to hit several lights at once. One light by itself is usually the bulb, fixture, or switch.
Lights dim when the AC kicks on, breaker?
Probably not. A quick dip when the compressor starts is normal. A big one isn’t. Inside Newark city limits, the City’s own electric utility handles the meter side.
Can I just swap a bad breaker myself
You can buy one at the hardware store. That’s about where I’d stop. The wrong brand can sit loose on the bus and arc, and one that looks seated isn’t always.
Is it normal for a breaker to feel kinda warm
A little warm on a busy circuit in August is fine. Hot enough to pull your hand back isn’t, and neither is one breaker running warmer than the rest. That one gets a call.
How long can I leave a bad breaker
An occasional blink with a cool breaker can wait for a normal appointment. If you smell hot plastic, shut that circuit off and call today. That doesn’t fix itself.
And hang on to those extra bulbs. Whatever it turns out to be, you’re stocked for a while.
