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odd light dimming issue?

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odd light dimming issue? Nate Nagel 11-18-2006
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Posted by Nate Nagel on November 18, 2006, 8:27 am


Well, I got a little more money than I was expecting to this week, so
last night I went out and bought some more tools that I thought I'd be
using a lot... I've realized that there are a few tools that I've
always had access to but never bought for myself, that now I have to buy
because I have my own place and I'd like to be able to do work here...
anyway, I got myself a new Sawzall and a 4-1/2" angle grinder, among
other things. This AM I just plugged them in and ran them to make sure
they worked before throwing out the packaging. The girlie yelled down
from upstairs, "you know, when you turn that on, the lights dim up
here..." WTF? I was using them in a 20A kitchen counter receptacle
which has nothing else on the circuit. The 15A lighting circuit for
upstairs is completely separate (and may or may not be on the same
phase, I don't remember.) Is this an issue, and what could cause it?
I'm guessing poor neutral connection at the panel?

Granted I did buy a real honest-to-god Milwaukee Sawzall and a good
Milwaukee angle grinder, not some cheap lightweight crap, but I think
both are rated at 10A which I would assume a 12/2 branch circuit would
handle no problem.

nate

--
replace "fly" with "com" to reply.
http://home.comcast.net/~njnagel

Posted by Edwin Pawlowski on November 18, 2006, 9:09 am



> The girlie yelled down from upstairs, "you know, when you turn that on,
> the lights dim up here..." WTF? I was using them in a 20A kitchen
> counter receptacle which has nothing else on the circuit. The 15A
> lighting circuit for upstairs is completely separate (and may or may not
> be on the same phase, I don't remember.) Is this an issue, and what could
> cause it? I'm guessing poor neutral connection at the panel?
>
> Granted I did buy a real honest-to-god Milwaukee Sawzall and a good
> Milwaukee angle grinder, not some cheap lightweight crap, but I think both
> are rated at 10A which I would assume a 12/2 branch circuit would handle
> no problem.

Other factors come in play. Think of the electric supply as a water supply.
There is only so many watts coming into the house. When there is a surge at
one outlet, there will be a drop at another. Some tools take quite a bit of
power to start up, well beyond the 10A running load. Sort of the same as
when you are in the shower and the dishwasher suddenly fills.

At the same time you started up that grinder, the refrigerator, heater, TV,
lights, etc were using some of the available power so a surge was very
noticeable.



Posted by m Ransley on November 18, 2006, 9:17 am


Done asume it 12-2


Posted by Joseph Meehan on November 18, 2006, 9:14 am


Nate Nagel wrote:
> Well, I got a little more money than I was expecting to this week, so
> last night I went out and bought some more tools that I thought I'd be
> using a lot... I've realized that there are a few tools that I've
> always had access to but never bought for myself, that now I have to
> buy because I have my own place and I'd like to be able to do work
> here... anyway, I got myself a new Sawzall and a 4-1/2" angle
> grinder, among other things. This AM I just plugged them in and ran
> them to make sure they worked before throwing out the packaging. The
> girlie yelled down from upstairs, "you know, when you turn that on,
> the lights dim up here..." WTF? I was using them in a 20A kitchen
> counter receptacle which has nothing else on the circuit. The 15A
> lighting circuit for upstairs is completely separate (and may or may
> not be on the same phase, I don't remember.) Is this an issue, and
> what could cause it? I'm guessing poor neutral connection at the
> panel?
> Granted I did buy a real honest-to-god Milwaukee Sawzall and a good
> Milwaukee angle grinder, not some cheap lightweight crap, but I think
> both are rated at 10A which I would assume a 12/2 branch circuit would
> handle no problem.
>
> nate

I agree with Ed. Frankly I would be more worried if they got brighter.
That would be a problem and it does happen.

The question is how much. Within reason it is normal. It also might be
a good indication that your home wiring including the supply my be
undersized for today's use. How old is your home?

--
Joseph Meehan

Dia 's Muire duit




Posted by Pete C. on November 18, 2006, 9:51 am


Nate Nagel wrote:
>
> Well, I got a little more money than I was expecting to this week, so
> last night I went out and bought some more tools that I thought I'd be
> using a lot... I've realized that there are a few tools that I've
> always had access to but never bought for myself, that now I have to buy
> because I have my own place and I'd like to be able to do work here...
> anyway, I got myself a new Sawzall and a 4-1/2" angle grinder, among
> other things. This AM I just plugged them in and ran them to make sure
> they worked before throwing out the packaging. The girlie yelled down
> from upstairs, "you know, when you turn that on, the lights dim up
> here..." WTF? I was using them in a 20A kitchen counter receptacle
> which has nothing else on the circuit. The 15A lighting circuit for
> upstairs is completely separate (and may or may not be on the same
> phase, I don't remember.) Is this an issue, and what could cause it?
> I'm guessing poor neutral connection at the panel?
>
> Granted I did buy a real honest-to-god Milwaukee Sawzall and a good
> Milwaukee angle grinder, not some cheap lightweight crap, but I think
> both are rated at 10A which I would assume a 12/2 branch circuit would
> handle no problem.
>
> nate
>
> --
> replace "fly" with "com" to reply.
> http://home.comcast.net/~njnagel

It may be normal, but it wouldn't hurt to spend some time going around
the house pulling outlets and switches and tightening connections along
with the connections in the main panel and any sub panels. It may be a
bit tedious, but you might find some developing problems.

Pete C.

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