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Dead Electrical Circuit Troubleshooting

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Dead Electrical Circuit Troubleshooting pcgeek86 04-06-2008
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Posted by HeyBub on April 7, 2008, 3:33 pm
mm wrote:
> On Sun, 6 Apr 2008 19:24:46 -0700 (PDT), pcgeek86@gmail.com wrote:
>
>>
>> I am using a stand-alone, contactless voltage tester. It's pretty
>> accurate at telling whether or not there is voltage coming out of a
>> wire,
>
> It's *pretty* accurate? Don't you think things would go faster if it
> were 100% accurate. Like most meters are?

It's not a "meter;" it's a "tester." Do you know the difference between
"accuracy" and "precision?" And if most meters are 100% accurate, as you
claim, why the disclaimer on digital meters?

>
> What does it use, a neon light? That's no way to test things.

You don't know what it is or how it works or its method of indicating
voltage. I despair of your advice.

But I think we have a teaching moment:

http://www.greenlee.com/product/gt-15/start.html

About $15.00





Posted by terry on April 7, 2008, 3:41 am
On Apr 6, 11:46=A0pm, pcgee...@gmail.com wrote:
> On Apr 6, 8:06 pm, nonam...@hotmail.com wrote:
>
>
>
>
>
> > This seems oblivious but if you haven't done this start here:
>
> > 1) With the breaker on, identify all dead outlet and switches. Check
> > every outlet, switch, appliance, junction box and light.
>
> > 2) Turn breaker off, =A0identify all dead outlet and switches. Check
> > ever outlet, switch, appliance, junction box and light.
>
> > 3) Any device that is dead in step two and is live in step 1 needs to
> > be checked for problems.
>
> > 4) If all the devices in step 3 check out then you either missed an
> > device or junction box or you have a wiring problem between two boxes
> > and it might be time to call a pro.
>
> > n Apr 6, 8:26 pm, pcgee...@gmail.com wrote:
>
> > > Hello guys,
>
> > > I've got a dead circuit in my house. I tested the output of the
> > > breaker, and it's fine. I have also done some research, which
> > > indicates that a tripped GFI outlet could cause the problem, however,
> > > I removed the GFI that's on the dead circuit, and there is no power
> > > going to the GFI even. None of the lines, on that circuit, that I've
> > > located in my house are hot.
>
> > > Does anyone have some additional troubleshooting ideas?
>
> > > Thanks,
>
> > > Trevor
>
> That sounds like some good advice. I haven't, as of yet, been able to
> find any live outlets on this circuit. This circuit actually affects a
> large number of things, including:
>
> Basement lights
> 3 power outlets in the living room
> 1st floor bath - GFI outlet
> 1st floor bath - fan
> 1st floor bath - light
> Front & Back outdoor a/c outlets
> Garage door motor
> Alarm system in garage
>
> I still haven't checked a couple light switches though, so I'll have
> to see about those.
>
> Thanks,
>
> Trevor- Hide quoted text -
>
> - Show quoted text -

Quite a lot and a mixture of lights and outlets on that one
circuit????

Under our codes that most likely will be wired with #14AWG and require
no more than a 15 amp circuit breaker.

Sounds as though the best way to to trouble shoot that would be to
follow the voltage from the output of the circuit breaker, as the OP
has done, and then go to each outlet or fixture in turn.

Best device to use would be an electric lamp/bulb screwed into a
socket with two insulated wires sticking out; some testers will give
false readings on voltages picked up by 'induction' from adjacent
working wires.

Voltage is normally between live (mostly black; assuming North
America) and neutral (usually white). But voltage can momentarily be
tested for between live/hot and ground. In fact such a test can
identify an open neutral wire between outlets.

Sounds like there is an open connection inside one of the outlet or
light fixture boxes possibly a deteriorated duple outlet. Hopefully
not one of those with the 'push-in' wire connections!

As mentioned if the GFI is early in the run and protecting everything
else downstream of it it could be defective and therefore affect the
whole circuit.
Small "t" terry

Posted by Stormin Mormon on April 7, 2008, 6:10 pm
Couple friends of mine had dead outlet in the kitchen. The problem turned
out to be where the wire came from the (live) outlet, going to the dead one.

Sorta like this, crudely illustrated:

Breaker========[outlet]========[outlet]-=========[intermittent outlet]

This may not relate to your problem, but their house had back stab outlets.

--
Christopher A. Young
Learn more about Jesus
www.lds.org
.



3) Any device that is dead in step two and is live in step 1 needs to
be checked for problems.




Posted by DerbyDad03 on April 6, 2008, 10:14 pm
On Apr 6, 8:26=A0pm, pcgee...@gmail.com wrote:
> Hello guys,
>
> I've got a dead circuit in my house. I tested the output of the
> breaker, and it's fine. I have also done some research, which
> indicates that a tripped GFI outlet could cause the problem, however,
> I removed the GFI that's on the dead circuit, and there is no power
> going to the GFI even. None of the lines, on that circuit, that I've
> located in my house are hot.
>
> Does anyone have some additional troubleshooting ideas?
>
> Thanks,
>
> Trevor

Can you follow the wires out of the panel to the first junction box or
fixture?

If the breaker is indeed good (you didn't say how you determined that)
and the very first fixture is dead, then you've pretty much narrowed
down the general location of the problem.

There may be a junction box in between the panel and the first fixture
with an open conection.

Posted by Jimmie D on April 7, 2008, 1:05 am

On Apr 6, 8:26 pm, pcgee...@gmail.com wrote:
> Hello guys,
>
> I've got a dead circuit in my house. I tested the output of the
> breaker, and it's fine. I have also done some research, which
> indicates that a tripped GFI outlet could cause the problem, however,
> I removed the GFI that's on the dead circuit, and there is no power
> going to the GFI even. None of the lines, on that circuit, that I've
> located in my house are hot.
>
> Does anyone have some additional troubleshooting ideas?
>
> Thanks,
>
> Trevor

Can you follow the wires out of the panel to the first junction box or
fixture?

If the breaker is indeed good (you didn't say how you determined that)
and the very first fixture is dead, then you've pretty much narrowed
down the general location of the problem.

There may be a junction box in between the panel and the first fixture
with an open conection.

The first thing I would do is pull the wire from the breaker. Make sure the
lug is not clamped down on the insulation.


Jimmie



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