On the printing press I have run for the past few decades, at one time I had a similar experience. I hadn't figured it out myself and had a printing electrical technician come out and try to figure it out. He spent the whole day trying to figure it out. I learned something from that day. Start looking at the source for brownouts.
Turned out all the trouble came from a loose wire lug on the main breaker for that press, it was a rather large breaker, a 3 phase, 240V at 100 amps. I didn't have the courage at the time to attempt to try to tighten the lugs myself. It took an allen wrench, there was no way I was putting my hands on a bare allen wrench on a major circuit like that, even if I knew it wasn't live. But after the lugs were tightened the brownouts stopped. The technician started at all the smaller circuits in the press, it wasn't until he worked his way to the breaker that he found the problem.
The symptoms were when I turned on a large pump that had a draw of around 50 amps various parts of the press would shut down. It didn't do it all the time. Problems like that can be mystifying if you haven't ever seen them before.
Just sharing my experience.
Steve
Various lights (on different breakers) are flickering. This happens randomly when nothing major is in use nor is anything major kicking on (like an AC or fridge) and I've also noticed happens sometimes if I use something (for instance a tool I used this evening initially sounded quite drained and sputtery as the lights flickered). I believe it's also happening on an entire different line for someone else but not positive. The flickering is usually pretty speedy, flicking a couple/few times rather fast....not sure if it's my imagination but it does vary from being dim to brighter at points.
On Wed, Nov 28, 2012 at 7:40 AM, wired <wiredformen@yahoo.com> wrote:
When this happens do you notice some get brighter while others get dimmer? That would be a neutral connection issue either on the street or within your service panel/meter. Are they on different circuits (breakers)? I assumed you mean more than one fixture flickering.
If only 1 circuit flickers, it's in that circuit. Likely the wiring goes from plug to plug/switch and could be a loose connection at any of the plugs on the circuit.
--- In DoIt_Yourself@yahoogroups.com, subprong <subprong@...> wrote:
>
> I've noticed flickering lights indoors the last couple of days that are
> fairly frequent. Electrically speaking nothing has changed recently. The
> only thing of minor note would be that I changed out an outdoor security
> light bulb a week or so ago on a dusk til dawn sensored light. Is there a
> chance that this bulb is working properly (lit) but be somehow defective
> that it would trigger problems on other circuits (pulling current from
> other circuits)?
>
> This light flickering happened a few years ago. The electric company came
> out and did something at the pole which fixed things up at the time. After
> he left I found a 3" long section of tightly bundled wires that had been
> cut and I presume replaced or adapted. It was a bunch of colored wires
> within a black casing. Probably about 3/4"-1" in diameter.
>
> Basically trying to figure out if this is something on my end or their end
> again.
>
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