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Why does microwave trip breaker?
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micky
Dec 12, 2013, 11:48:14 AM12/12/13
to
A friend with a Panasonic microwave, Inverter model, physcially a big
one, says it is tripping the circuit breaker after about 5 minutes of
running.
They've reset the breaker several times and it's the same each time.
What's your best guess?
I havent' looked at it yet, but my best guess from afar is that some
of the primary windings in the transformer have shorted, and thus the
impedance of the primary has decreased and it's drawing more current
than it should, more than 15 amps. Does this sound reasonable? If
not reasonable, then possible?
one, says it is tripping the circuit breaker after about 5 minutes of
running.
They've reset the breaker several times and it's the same each time.
What's your best guess?
I havent' looked at it yet, but my best guess from afar is that some
of the primary windings in the transformer have shorted, and thus the
impedance of the primary has decreased and it's drawing more current
than it should, more than 15 amps. Does this sound reasonable? If
not reasonable, then possible?
philo
Dec 12, 2013, 12:59:31 PM12/12/13
to
If there are NO other devices on that circuit and you do not have an AC
ammeter, temporarily try the microwave on some completely different
circuit. If that circuit breaker blows too, then the microwave may very
well be bad. OTOH: If it does not blow, then the breaker is weak OR the
wiring going to it is loose or burned and getting hot!
cl...@snyder.on.ca
Dec 12, 2013, 1:13:15 PM12/12/13
to
On Thu, 12 Dec 2013 11:48:14 -0500, micky <NONONO...@bigfoot.com>
wrote:
Being an inverter model it doesn't have the big transformer in it. Is
it on a separate dedicated circuit??? What wattage is the oven? My
suspiscion would point to the breaker if it is less than 1700 watts
and on a dedicated circuit. If not on a dedicated circuit, what else
is on with it???
wrote:
it on a separate dedicated circuit??? What wattage is the oven? My
suspiscion would point to the breaker if it is less than 1700 watts
and on a dedicated circuit. If not on a dedicated circuit, what else
is on with it???
Paul Drahn
Dec 12, 2013, 1:14:04 PM12/12/13
to
called and inverter. It's so light, they should move it to another
circuit and try it.
The time delay is the breaker getting warm enough to open. I suspect a
worn out breaker! Replace it and all should be ok.
Paul
Tony Hwang
Dec 12, 2013, 1:24:34 PM12/12/13
to
First question to ask is, Did the unit work well and started tripping
breaker lately or they got new one and try to start use it?
micky
Dec 12, 2013, 5:23:00 PM12/12/13
to
On Thu, 12 Dec 2013 11:24:34 -0700, Tony Hwang <drag...@shaw.ca>
wrote:
It's a few years old, and worked fine until a day or two ago.
wrote:
micky
Dec 12, 2013, 5:32:43 PM12/12/13
to
On Thu, 12 Dec 2013 11:59:31 -0600, philo� <ph...@privacy.net> wrote:
>On 12/12/2013 10:48 AM, micky wrote:
>> A friend with a Panasonic microwave, Inverter model, physcially a big
>> one, says it is tripping the circuit breaker after about 5 minutes of
>> running.
>>
>> They've reset the breaker several times and it's the same each time.
>>
>> What's your best guess?
>>
>> I havent' looked at it yet, but my best guess from afar is that some
>> of the primary windings in the transformer have shorted, and thus the
>> impedance of the primary has decreased and it's drawing more current
>> than it should, more than 15 amps. Does this sound reasonable? If
>> not reasonable, then possible?
>>
>
>
>
>They may have other devices on the breaker which they should remove.
That i thought of, but I didn't get a satisfactory answer. The
>On 12/12/2013 10:48 AM, micky wrote:
>> A friend with a Panasonic microwave, Inverter model, physcially a big
>> one, says it is tripping the circuit breaker after about 5 minutes of
>> running.
>>
>> They've reset the breaker several times and it's the same each time.
>>
>> What's your best guess?
>>
>> I havent' looked at it yet, but my best guess from afar is that some
>> of the primary windings in the transformer have shorted, and thus the
>> impedance of the primary has decreased and it's drawing more current
>> than it should, more than 15 amps. Does this sound reasonable? If
>> not reasonable, then possible?
>>
>
>
>
>They may have other devices on the breaker which they should remove.
electric coffee maker is on the same circuit and they've had to unplug
that, but it isn't plugged in now. But when I tried to bring up other
things plugged in to the same circuit, I got some words I didn't
understand.
>
>If there are NO other devices on that circuit and you do not have an AC
>ammeter, temporarily try the microwave on some completely different
>circuit.
That I didn't think of, and I should have. He said around 3 that
>If there are NO other devices on that circuit and you do not have an AC
>ammeter, temporarily try the microwave on some completely different
>circuit.
he'd found one, in the paper or online, a lot like this one, and he
was going to buy one today. I told him I would ask online, but he
still went shopping. I read your replies about 5, and after all of
you brought up the breaker, I called and he wasn't home. I called his
cell and got voicemail. I called his wife at home and he was just
coming in but had to go out and had no time to talk!
She told him it might be the breaker and I could hear him say, That's
a good idea"
I could hear him tell her that the new one was in the car. It's safe
enough he can leave it in the car all night, but I have a feeling he
will bring it in, open it up, and cook something, when he gets home
tonight. .
> If that circuit breaker blows too, then the microwave may very
>well be bad. OTOH: If it does not blow, then the breaker is weak OR the
>wiring going to it is loose or burned and getting hot!
thought of, and before I discounted it, she'd was in a hurry and said
goodbye too.
Maybe I'll know something tomorrow, but experience in general tells me
that when someone gets this head up about buying something, he'll buy
it whether he needs it or not.
Thanks philo and all of you.
philo
Dec 12, 2013, 5:39:08 PM12/12/13
to
On 12/12/2013 04:32 PM, micky wrote:
>
<snipped for brevity>
> I could hear him tell her that the new one was in the car. It's safe
> enough he can leave it in the car all night, but I have a feeling he
> will bring it in, open it up, and cook something, when he gets home
> tonight. .
>
>> If that circuit breaker blows too, then the microwave may very
>> well be bad. OTOH: If it does not blow, then the breaker is weak OR the
>> wiring going to it is loose or burned and getting hot!
>
> I was explaining this to the wife, but she raised something I hadn'ty
> thought of, and before I discounted it, she'd was in a hurry and said
> goodbye too.
>
> Maybe I'll know something tomorrow, but experience in general tells me
> that when someone gets this head up about buying something, he'll buy
> it whether he needs it or not.
>
> Thanks philo and all of you.
>
If you can get them to go through all those steps I'm sure they will get
it sorted out.
If the do replace the breaker they need to be sure the wire going to it
is not burned...if it is tarnished, the problem will just start all over
again.
>
<snipped for brevity>
> I could hear him tell her that the new one was in the car. It's safe
> enough he can leave it in the car all night, but I have a feeling he
> will bring it in, open it up, and cook something, when he gets home
> tonight. .
>
>> If that circuit breaker blows too, then the microwave may very
>> well be bad. OTOH: If it does not blow, then the breaker is weak OR the
>> wiring going to it is loose or burned and getting hot!
>
> I was explaining this to the wife, but she raised something I hadn'ty
> thought of, and before I discounted it, she'd was in a hurry and said
> goodbye too.
>
> Maybe I'll know something tomorrow, but experience in general tells me
> that when someone gets this head up about buying something, he'll buy
> it whether he needs it or not.
>
> Thanks philo and all of you.
>
it sorted out.
If the do replace the breaker they need to be sure the wire going to it
is not burned...if it is tarnished, the problem will just start all over
again.
micky
Dec 12, 2013, 5:39:13 PM12/12/13
to
On Thu, 12 Dec 2013 10:14:04 -0800, Paul Drahn
<pdr...@webformixair.com> wrote:
>On 12/12/2013 8:48 AM, micky wrote:
>> A friend with a Panasonic microwave, Inverter model, physcially a big
>> one, says it is tripping the circuit breaker after about 5 minutes of
>> running.
>>
>> They've reset the breaker several times and it's the same each time.
>>
>> What's your best guess?
>>
>> I havent' looked at it yet, but my best guess from afar is that some
>> of the primary windings in the transformer have shorted, and thus the
>> impedance of the primary has decreased and it's drawing more current
>> than it should, more than 15 amps. Does this sound reasonable? If
>> not reasonable, then possible?
>We have one like that. There is no big transformer! that is why it's
>called and inverter.
No kidding! I wondered about the name.
<pdr...@webformixair.com> wrote:
>On 12/12/2013 8:48 AM, micky wrote:
>> A friend with a Panasonic microwave, Inverter model, physcially a big
>> one, says it is tripping the circuit breaker after about 5 minutes of
>> running.
>>
>> They've reset the breaker several times and it's the same each time.
>>
>> What's your best guess?
>>
>> I havent' looked at it yet, but my best guess from afar is that some
>> of the primary windings in the transformer have shorted, and thus the
>> impedance of the primary has decreased and it's drawing more current
>> than it should, more than 15 amps. Does this sound reasonable? If
>> not reasonable, then possible?
>We have one like that. There is no big transformer! that is why it's
>called and inverter.
> It's so light, they should move it to another
>circuit and try it.
wife it was light
>The time delay is the breaker getting warm enough to open. I suspect a
>worn out breaker! Replace it and all should be ok.
a new one anyhow. Oh, well, I tried. And at least I learned a
couple new things.
>Paul
The Daring Dufas
Dec 12, 2013, 5:50:08 PM12/12/13
to
On 12/12/2013 10:48 AM, micky wrote:
> A friend with a Panasonic microwave, Inverter model, physcially a
> big one, says it is tripping the circuit breaker after about 5
> minutes of running.
>
Microwaves are notoriously mean and will trip anyone coming by them. ^_^
> big one, says it is tripping the circuit breaker after about 5
> minutes of running.
>
TDD
Stormin Mormon
Dec 12, 2013, 6:04:25 PM12/12/13
to
box. Put ammeter on the wire, and see for real. In
real time. Or use a splitter where the plug goes
into the wall.
--
.
Christopher A. Young
Learn about Jesus
www.lds.org
.
Daring Dufas : Hypocrite TeaBillie on welfare
Dec 12, 2013, 7:50:12 PM12/12/13
to
Let me seemed.
To.much current?
Does he run his coffee maker at the same time?
To.much current?
Does he run his coffee maker at the same time?
The Daring Dufas
Dec 12, 2013, 8:17:52 PM12/12/13
to
farm animals. ^_^
TDD
micky
Dec 13, 2013, 5:40:19 AM12/13/13
to
You remind me that I had bought a Kill-o-watt, or whatever to measure
wattage. Haven't used it. Only bought it then to put myself over 25
dollars for free amazon shipping. (Now you have to spend 35 dollars
for that) He's supposed to call this morning. I'll suggest it.
Except we'll have to stare at it for 5 minutes to see if it's high
when the breaker trips. Iwonder if it remembers a max value. .
micky
Dec 13, 2013, 5:40:57 AM12/13/13
to
times the breaker tripped.
micky
Dec 13, 2013, 5:42:21 AM12/13/13
to
Stormin Mormon
Dec 13, 2013, 7:17:08 AM12/13/13
to
On 12/13/2013 5:40 AM, micky wrote:
>> An electrician might pull the front off the breaker
>> box. Put ammeter on the wire, and see for real. In
>> real time. Or use a splitter where the plug goes
>> into the wall.
>
> Splitter?
>
> You remind me that I had bought a Kill-o-watt, or whatever to measure
> wattage. Haven't used it. Only bought it then to put myself over 25
> dollars for free amazon shipping. (Now you have to spend 35 dollars
> for that) He's supposed to call this morning. I'll suggest it.
> Except we'll have to stare at it for 5 minutes to see if it's high
> when the breaker trips. Iwonder if it remembers a max value. .
AC clamp on ammeter only goes around one of the
>> An electrician might pull the front off the breaker
>> box. Put ammeter on the wire, and see for real. In
>> real time. Or use a splitter where the plug goes
>> into the wall.
>
> Splitter?
>
> You remind me that I had bought a Kill-o-watt, or whatever to measure
> wattage. Haven't used it. Only bought it then to put myself over 25
> dollars for free amazon shipping. (Now you have to spend 35 dollars
> for that) He's supposed to call this morning. I'll suggest it.
> Except we'll have to stare at it for 5 minutes to see if it's high
> when the breaker trips. Iwonder if it remembers a max value. .
power wires (power or neutral). As such, we use
a splitter, so you can clamp one of the wires
but not the other. If you clamp the entire
microwave cord, you read zero amps of current.
micky
Dec 13, 2013, 9:34:41 AM12/13/13
to
I used to have a clamp-on attachment, but I bought a cheap clamp-on
meter from HF and sold the attachment for a dollar at a hamfest.
STill haven't used that either. But I probably will if I live long
enough.
Daring Dufas : Hypocrite TeaBillie on welfare
Dec 13, 2013, 9:41:20 AM12/13/13
to
Stormin Mormon
Dec 13, 2013, 9:52:22 AM12/13/13
to
On 12/13/2013 9:34 AM, micky wrote:
>> AC clamp on ammeter only goes around one of the
>> power wires (power or neutral). As such, we use
>> a splitter, so you can clamp one of the wires
>> but not the other. If you clamp the entire
>> microwave cord, you read zero amps of current.
>
> Oh, yeah. I get it.
>
> I used to have a clamp-on attachment, but I bought a cheap clamp-on
> meter from HF and sold the attachment for a dollar at a hamfest.
> STill haven't used that either. But I probably will if I live long
> enough.
I use ammeter, now and again while working on equipment.
>> AC clamp on ammeter only goes around one of the
>> power wires (power or neutral). As such, we use
>> a splitter, so you can clamp one of the wires
>> but not the other. If you clamp the entire
>> microwave cord, you read zero amps of current.
>
> Oh, yeah. I get it.
>
> I used to have a clamp-on attachment, but I bought a cheap clamp-on
> meter from HF and sold the attachment for a dollar at a hamfest.
> STill haven't used that either. But I probably will if I live long
> enough.
Can be very useful information.
Tony Hwang
Dec 13, 2013, 10:36:26 AM12/13/13
to
Ammeter has to in sereis with circuit duo you ct wires or put it
between equipment breaker(switch) poles?
Tony Hwang
Dec 13, 2013, 10:50:04 AM12/13/13
to
AC ammeter, Wow! when you use it do you cut the wires to put in the
circuit or connect to breaker(switch) terminals for the equipment under
test.
Stormin Mormon
Dec 13, 2013, 11:27:16 AM12/13/13
to
On 12/13/2013 10:36 AM, Tony Hwang wrote:
>>> I used to have a clamp-on attachment, but I bought a cheap clamp-on
>>> meter from HF and sold the attachment for a dollar at a hamfest.
>>> STill haven't used that either. But I probably will if I live long
>>> enough.
>>
>> I use ammeter, now and again while working on equipment.
>> Can be very useful information.
>>
> Hi,
> Ammeter has to in sereis with circuit duo you ct wires or put it
> between equipment breaker(switch) poles?
I use a new gadget called a "clamp on ammeter"
>>> I used to have a clamp-on attachment, but I bought a cheap clamp-on
>>> meter from HF and sold the attachment for a dollar at a hamfest.
>>> STill haven't used that either. But I probably will if I live long
>>> enough.
>>
>> I use ammeter, now and again while working on equipment.
>> Can be very useful information.
>>
> Hi,
> Ammeter has to in sereis with circuit duo you ct wires or put it
> between equipment breaker(switch) poles?
which goes around a single wire which carries
current.
The Daring Dufas
Dec 13, 2013, 11:57:48 AM12/13/13
to
On 12/13/2013 8:41 AM, Daring Dufas : A Sock Of Killer Loon
wrote:
wrote:
> On Thursday, December 12, 2013 10:48:14 AM UTC-6, micky wrote:
>> A friend with a Panasonic microwave, Inverter model, physcially a
>> A friend with a Panasonic microwave, Inverter model, physcially a
Irreverent Maximus
Dec 13, 2013, 12:32:27 PM12/13/13
to
"Stormin Mormon" <cayo...@hotmail.com> wrote in message news:5VCqu.151585$XI7....@fx04.iad...
http://www.extech.com/instruments/product.asp?catid=30&prodid=114
The Daring Dufas
Dec 13, 2013, 12:53:59 PM12/13/13
to
TDD
Irreverent Maximus
Dec 13, 2013, 1:03:02 PM12/13/13
to
"The Daring Dufas" <the-dari...@stinky-finger.net> wrote in message news:l8fhjo$ks7$1...@dont-email.me...
Stormin Mormon
Dec 13, 2013, 1:27:38 PM12/13/13
to
On 12/13/2013 12:32 PM, Irreverent Maximus wrote:
>
> "Stormin Mormon" <cayo...@hotmail.com> wrote in message
> news:5VCqu.151585$XI7....@fx04.iad...
>> On 12/13/2013 5:40 AM, micky wrote:
>>>> An electrician might pull the front off the breaker
>>>> box. Put ammeter on the wire, and see for real. In
>>>> real time. Or use a splitter where the plug goes
>>>> into the wall.
>>>
>>> Splitter?
>>>
>
>
> "Stormin Mormon" <cayo...@hotmail.com> wrote in message
> news:5VCqu.151585$XI7....@fx04.iad...
>> On 12/13/2013 5:40 AM, micky wrote:
>>>> An electrician might pull the front off the breaker
>>>> box. Put ammeter on the wire, and see for real. In
>>>> real time. Or use a splitter where the plug goes
>>>> into the wall.
>>>
>>> Splitter?
>>>
>
> Example of a line splitter.
>
> http://www.extech.com/instruments/product.asp?catid=30&prodid=114
>
>
Very good example. What I was thinking.
>
> http://www.extech.com/instruments/product.asp?catid=30&prodid=114
>
>
The Daring Dufas
Dec 13, 2013, 1:28:14 PM12/13/13
to
use for it is to crush cockroaches when they crawl across the work
bench. ^_^
TDD
Irreverent Maximus
Dec 13, 2013, 4:01:12 PM12/13/13
to
"The Daring Dufas" <the-dari...@stinky-finger.net> wrote in message news:l8fjju$2j4$1...@dont-email.me...
> I use it to scratch my head because the prongs aren't too sharp. Another
> use for it is to crush cockroaches when they crawl across the work
> bench. ^_^
>
> TDD
cl...@snyder.on.ca
Dec 13, 2013, 5:07:53 PM12/13/13
to
On Fri, 13 Dec 2013 08:50:04 -0700, Tony Hwang <drag...@shaw.ca>
wrote:
Easy to make an adapter to put an ammeter inline - just make a short
extension cord with one of the wires cut and brought out to connect
the ammeter. - makes it a "plug in ammeter"
wrote:
extension cord with one of the wires cut and brought out to connect
the ammeter. - makes it a "plug in ammeter"
cl...@snyder.on.ca
Dec 13, 2013, 5:12:25 PM12/13/13
to
On Fri, 13 Dec 2013 13:27:38 -0500, Stormin Mormon
<cayo...@hotmail.com> wrote:
>http://www.extech.com/instruments/product.asp?catid=30&prodid=114
I just make a short extention cord and split the external sheath,
allowing the insulated conductors to separate so you can install the
clamp-on meter. About $3.
<cayo...@hotmail.com> wrote:
>http://www.extech.com/instruments/product.asp?catid=30&prodid=114
I just make a short extention cord and split the external sheath,
allowing the insulated conductors to separate so you can install the
clamp-on meter. About $3.
Metspitzer
Dec 13, 2013, 5:28:48 PM12/13/13
to
in series with a meter.
Irreverent Maximus
Dec 13, 2013, 6:28:05 PM12/13/13
to
"Metspitzer" <Kilo...@charter.net> wrote in message news:cf2na95nktth1kpsr...@4ax.com...
> Actually no. The current involved in house wiring is too high to put
> in series with a meter.
>
John G
Dec 13, 2013, 6:32:11 PM12/13/13
to
Metspitzer formulated the question :
Actually the current in any circuit can be higher than the meter can
handle so it is a decision to be made every time you connect.
I never cease to be amazed how little knowledge there is about
electricity amongst people risking their lives messing with it.
--
John G
handle so it is a decision to be made every time you connect.
I never cease to be amazed how little knowledge there is about
electricity amongst people risking their lives messing with it.
--
John G
Fred McKenzie
Dec 13, 2013, 6:56:13 PM12/13/13
to
In article <s0pla95i4u5077da1...@4ax.com>,
When I bought a large (at the time) microwave, I plugged it in and
started to heat a cup of water. There was a loud noise and the breaker
popped.
I took the microwave back and exchanged it. When I tried the same test
with the new one, the same thing happened. It turned out the breaker
was defective. Over 15 years later, the replacement microwave is still
working with the new breaker.
As far as using a coffee maker and a microwave at the same time, you may
be able to find two outlets that are on different breakers.
Fred
started to heat a cup of water. There was a loud noise and the breaker
popped.
I took the microwave back and exchanged it. When I tried the same test
with the new one, the same thing happened. It turned out the breaker
was defective. Over 15 years later, the replacement microwave is still
working with the new breaker.
As far as using a coffee maker and a microwave at the same time, you may
be able to find two outlets that are on different breakers.
Fred
cl...@snyder.on.ca
Dec 13, 2013, 7:08:01 PM12/13/13
to
On Fri, 13 Dec 2013 17:28:48 -0500, Metspitzer <Kilo...@charter.net>
Bollocks. A shunt ammeter can handle hundreds of amps in series with
the load. The shunt is a very low resistance high current device, and
a voltmeter reads the voltage drop across the resistance, calibrated
in amps.
the load. The shunt is a very low resistance high current device, and
a voltmeter reads the voltage drop across the resistance, calibrated
in amps.
John G
Dec 13, 2013, 7:22:24 PM12/13/13
to
cl...@snyder.on.ca explained on 14/12/2013 :
Till you understand electricity please stop spouting rubbish.
An ammeter can only safely handle its rated current.
Yes, the shunt is a low resistance but it is only big enough to handle
the rated current.
ie a 5 amp meter will have a shunt or be intenally capable of carrying
5 amps plus a margin for overload safety.
It will explode at "hundreds of amps"
--
John G
An ammeter can only safely handle its rated current.
Yes, the shunt is a low resistance but it is only big enough to handle
the rated current.
ie a 5 amp meter will have a shunt or be intenally capable of carrying
5 amps plus a margin for overload safety.
It will explode at "hundreds of amps"
--
John G
Irreverent Maximus
Dec 13, 2013, 8:35:25 PM12/13/13
to
"John G" <gree...@ozemail.com.au> wrote in message news:krudnVLr7cJYOTbP...@westnet.com.au...
>
> Till you understand electricity please stop spouting rubbish.
>
> An ammeter can only safely handle its rated current.
> Yes, the shunt is a low resistance but it is only big enough to handle
> the rated current.
> ie a 5 amp meter will have a shunt or be intenally capable of carrying
> 5 amps plus a margin for overload safety.
> It will explode at "hundreds of amps"
>
> --
> John G
safer.
cl...@snyder.on.ca
Dec 13, 2013, 8:36:57 PM12/13/13
to
On Sat, 14 Dec 2013 11:22:24 +1100, John G <gree...@ozemail.com.au>
wrote:
The previous poster said "Actually no. The current involved in
house wiring is too high to put in series with a meter." to which I
replied"Bollocks. A shunt ammeter can handle hundreds of amps in
stop spouting rubbish."
I DO understand electricity - as well as you do. I didn't say just ANY
ammeter can be used - quite obviously you use the right sized tool for
the job. You argue just to hear the sound of your pitiful voice.
I explained what a shunt ameter is and how it works - I commonly used
350 amp external shunt ammeters - as well as 3.5 amp external shunts .
All you could do is dissagree. Grow up.
wrote:
house wiring is too high to put in series with a meter." to which I
replied"Bollocks. A shunt ammeter can handle hundreds of amps in
series with the load. The shunt is a very low resistance high current
device, and a voltmeter reads the voltage drop across the resistance,
calibrated in amps."
To which you stupidly replied"Till you understand electricity please
device, and a voltmeter reads the voltage drop across the resistance,
calibrated in amps."
stop spouting rubbish."
I DO understand electricity - as well as you do. I didn't say just ANY
ammeter can be used - quite obviously you use the right sized tool for
the job. You argue just to hear the sound of your pitiful voice.
I explained what a shunt ameter is and how it works - I commonly used
350 amp external shunt ammeters - as well as 3.5 amp external shunts .
All you could do is dissagree. Grow up.
Irreverent Maximus
Dec 13, 2013, 9:33:01 PM12/13/13
to
<cl...@snyder.on.ca> wrote in message news:b2dna9l0lak4ds5ba...@4ax.com...
> The previous poster said "Actually no. The current involved in
> house wiring is too high to put in series with a meter." to which I
> replied"Bollocks. A shunt ammeter can handle hundreds of amps in
> series with the load. The shunt is a very low resistance high current
> device, and a voltmeter reads the voltage drop across the resistance,
> calibrated in amps."
> To which you stupidly replied"Till you understand electricity please
> stop spouting rubbish."
>
> I DO understand electricity - as well as you do. I didn't say just ANY
> ammeter can be used - quite obviously you use the right sized tool for
> the job. You argue just to hear the sound of your pitiful voice.
>
> I explained what a shunt ameter is and how it works - I commonly used
> 350 amp external shunt ammeters - as well as 3.5 amp external shunts .
> All you could do is dissagree. Grow up.
Tony Hwang
Dec 13, 2013, 9:54:48 PM12/13/13
to
Even today I ran into knit picker on another forum. Some picks on
word(s) instead of the meaning poster is trying to convey. My major is
not in language. AC ammeter is much more to it compared to DC version.
k...@attt.bizz
Dec 13, 2013, 11:13:44 PM12/13/13
to
>An ammeter can only safely handle its rated current.
>Yes, the shunt is a low resistance but it is only big enough to handle
>the rated current.
>ie a 5 amp meter will have a shunt or be intenally capable of carrying
>5 amps plus a margin for overload safety.
>It will explode at "hundreds of amps"
The Daring Dufas
Dec 14, 2013, 1:17:31 AM12/14/13
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She just now came up to me and put her tiny paws on my thigh to get my
attention. She wanted in my lap or for me to get her comforter off the
loveseat to put on the floor next to me so she could burrow under it. ^_^
TDD
bob haller
Dec 14, 2013, 1:18:31 AM12/14/13
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so the microwave was on the same circuit as a coffee maker. breaker tripped frequently when both devices were on
this damaged the breaker, they are designed to get more sensitive as they age or wear.....
so now normal operation is tripping the breaker.....
i bet you will find they need a new breaker.... this is a common failure mode for breakers
this damaged the breaker, they are designed to get more sensitive as they age or wear.....
so now normal operation is tripping the breaker.....
i bet you will find they need a new breaker.... this is a common failure mode for breakers
Irreverent Maximus
Dec 14, 2013, 2:00:33 AM12/14/13
to
"The Daring Dufas" <the-dari...@stinky-finger.net> wrote in message news:l8gt5r$p11$1...@dont-email.me...
> Actually Sandy has an itchy butt which I see her dragging on the rug.
> She just now came up to me and put her tiny paws on my thigh to get my
> attention. She wanted in my lap or for me to get her comforter off the
> loveseat to put on the floor next to me so she could burrow under it. ^_^
>
> TDD
Caulki...@work.com
Dec 14, 2013, 5:55:17 AM12/14/13
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On Thu, 12 Dec 2013 16:50:12 -0800 (PST), "Daring Dufas : Hypocrite
TeaBillie on welfare" <loonk...@gmail.com> wrote:
>Let me seemed.
>
>
>To.much current?
>
>Does he run his coffee maker at the same time?
Plug it into another outlet that you KNOW is not connected to other
TeaBillie on welfare" <loonk...@gmail.com> wrote:
>Let me seemed.
>
>
>To.much current?
>
>Does he run his coffee maker at the same time?
stuff. If it blows that breaker, the microwave is defective. If not,
you have an overload (too much stuff) on that circuit, or a bad breaker.
A microwave should have it's own dedicated breaker.
micky
Dec 14, 2013, 7:37:41 AM12/14/13
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On Sat, 14 Dec 2013 10:32:11 +1100, John G <gree...@ozemail.com.au>
wrote:
>
>
>--
>John G
wrote:
>
>Actually the current in any circuit can be higher than the meter can
>handle so it is a decision to be made every time you connect.
>
>I never cease to be amazed how little knowledge there is about
>electricity amongst people risking their lives messing with it.
Where would the excitement be if they knew all about it!
>handle so it is a decision to be made every time you connect.
>
>I never cease to be amazed how little knowledge there is about
>electricity amongst people risking their lives messing with it.
>
>--
>John G
micky
Dec 14, 2013, 7:54:04 AM12/14/13
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On Fri, 13 Dec 2013 19:54:48 -0700, Tony Hwang <drag...@shaw.ca>
wrote:
>Irreverent Maximus wrote:
>>
>> <cl...@snyder.on.ca> wrote in message
>> news:b2dna9l0lak4ds5ba...@4ax.com...
>>
>>> The previous poster said "Actually no. The current involved in
>>> house wiring is too high to put in series with a meter." to which I
>>> replied"Bollocks. A shunt ammeter can handle hundreds of amps in
>>> series with the load. The shunt is a very low resistance high current
>>> device, and a voltmeter reads the voltage drop across the resistance,
>>> calibrated in amps."
>>> To which you stupidly replied"Till you understand electricity please
>>> stop spouting rubbish."
>>>
>>> I DO understand electricity - as well as you do. I didn't say just ANY
>>> ammeter can be used - quite obviously you use the right sized tool for
>>> the job. You argue just to hear the sound of your pitiful voice.
>>>
>>> I explained what a shunt ameter is and how it works - I commonly used
>>> 350 amp external shunt ammeters - as well as 3.5 amp external shunts .
>>> All you could do is dissagree. Grow up.
>>
>> +1
>Hi,
>Even today I ran into knit picker on another forum. Some picks on
Not knit. nit picker nit. the egg of a parasitic insect,
especially of a louse, often attached to a hair or a fiber of
clothing. Or the young of such an insect.
Monkeys etc. like to look through their friends' hair to remove any
nits.
Couldn't resist a little nit-picking of my own. And I think some
don't know the origin of this colorful word.
wrote:
>Irreverent Maximus wrote:
>>
>> <cl...@snyder.on.ca> wrote in message
>> news:b2dna9l0lak4ds5ba...@4ax.com...
>>
>>> The previous poster said "Actually no. The current involved in
>>> house wiring is too high to put in series with a meter." to which I
>>> replied"Bollocks. A shunt ammeter can handle hundreds of amps in
>>> series with the load. The shunt is a very low resistance high current
>>> device, and a voltmeter reads the voltage drop across the resistance,
>>> calibrated in amps."
>>> To which you stupidly replied"Till you understand electricity please
>>> stop spouting rubbish."
>>>
>>> I DO understand electricity - as well as you do. I didn't say just ANY
>>> ammeter can be used - quite obviously you use the right sized tool for
>>> the job. You argue just to hear the sound of your pitiful voice.
>>>
>>> I explained what a shunt ameter is and how it works - I commonly used
>>> 350 amp external shunt ammeters - as well as 3.5 amp external shunts .
>>> All you could do is dissagree. Grow up.
>>
>> +1
>Hi,
>Even today I ran into knit picker on another forum. Some picks on
especially of a louse, often attached to a hair or a fiber of
clothing. Or the young of such an insect.
Monkeys etc. like to look through their friends' hair to remove any
nits.
Couldn't resist a little nit-picking of my own. And I think some
don't know the origin of this colorful word.
Daring Dufas : Hypocrite TeaBillie on welfare
Dec 14, 2013, 7:57:28 AM12/14/13
to
Replace the 15amp breaker witn a 20a one. You apparently can't grasp the consequences of what is happening and firefighters need something to do too.
The Daring Dufas
Dec 14, 2013, 8:28:38 AM12/14/13
to
farm animals. ^_^
TDD
k...@attt.bizz
Dec 14, 2013, 12:02:13 PM12/14/13
to
On Sat, 14 Dec 2013 07:54:04 -0500, micky <NONONO...@bigfoot.com>
wrote:
Maybe Tony goes around picking the pills off of people's sweaters? ;-)
wrote:
cl...@snyder.on.ca
Dec 14, 2013, 12:06:56 PM12/14/13
to
On Fri, 13 Dec 2013 19:54:48 -0700, Tony Hwang <drag...@shaw.ca>
wrote:
Actually an AC ammeter can be easier to implement than DC for high
current, as a current transformer can take the place of the chunt -
and a current transformer CAN be as simple as a single turn of the
power conductior through a toroid for the primary (current sensing)
winding. The common AC clampon ammeter often uses this measurement
method. The only complication of an AC ammeter is the requirement to
rectify the signal to the meter or read-out - a simple task.
wrote:
current, as a current transformer can take the place of the chunt -
and a current transformer CAN be as simple as a single turn of the
power conductior through a toroid for the primary (current sensing)
winding. The common AC clampon ammeter often uses this measurement
method. The only complication of an AC ammeter is the requirement to
rectify the signal to the meter or read-out - a simple task.
tra...@optonline.net
Dec 14, 2013, 12:56:49 PM12/14/13
to
You obviously have to have a meter and/or adaptor rated
for the current. But meters capable of being inserted into
a 15 or 20a circuit are common.
sam E
Dec 15, 2013, 12:47:15 PM12/15/13
to
scale reading. Most of the current doesn't go through the meter, but
through the shunt.
IIRC, the current through a digital meter is MUCH less.
BTW, my multimeter has a 10A range (using a low-resistance shunt). That
was one reason for choosing that meter (many were limited to 200mA).
Later I got a clamp meter that measures AC current up to 400A.
BTW2, have you ever used a clamp meter on DC?
Mark Lloyd
Dec 15, 2013, 12:56:11 PM12/15/13
to
On 12/14/2013 04:55 AM, Caulki...@work.com wrote:
[snip]
> Plug it into another outlet that you KNOW is not connected to other
> stuff. If it blows that breaker, the microwave is defective. If not,
> you have an overload (too much stuff) on that circuit, or a bad breaker.
> A microwave should have it's own dedicated breaker.
>
I have a Penny's microwave from about 1985, that still works (although
the power is only 700W). 10 years later It went dead. I looked inside
even though there was probably nothing I could do. However the problem
was just a blown fuse. At the time Radio Shack sold the proper fuse for
69 cents. There have been no problems with it since then.
BTW, most cooking directions assume 1000W or so. I just add 25% to the time.
--
10 days until The winter celebration (Wednesday December 25, 2013 12:00
AM for 1 day).
Mark Lloyd
http://notstupid.us
"God isn't as great as you think. Hes just got good marketing."
[snip]
> Plug it into another outlet that you KNOW is not connected to other
> stuff. If it blows that breaker, the microwave is defective. If not,
> you have an overload (too much stuff) on that circuit, or a bad breaker.
> A microwave should have it's own dedicated breaker.
>
the power is only 700W). 10 years later It went dead. I looked inside
even though there was probably nothing I could do. However the problem
was just a blown fuse. At the time Radio Shack sold the proper fuse for
69 cents. There have been no problems with it since then.
BTW, most cooking directions assume 1000W or so. I just add 25% to the time.
--
10 days until The winter celebration (Wednesday December 25, 2013 12:00
AM for 1 day).
Mark Lloyd
http://notstupid.us
"God isn't as great as you think. Hes just got good marketing."
k...@attt.bizz
Dec 15, 2013, 1:42:56 PM12/15/13
to
On Sun, 15 Dec 2013 11:47:15 -0600, sam E
<sa...@dont.send.email.invalid> wrote:
>On 12/13/2013 05:28 PM, Irreverent Maximus wrote:
>>
>> "Metspitzer" <Kilo...@charter.net> wrote in message
>> news:cf2na95nktth1kpsr...@4ax.com...
>>
>>> Actually no. The current involved in house wiring is too high to put
>>> in series with a meter.
>>>
>>
>> Not if you are using a "rated" shunt meter. :-)
>
>The analog meters I've seen use as little as 20uA (.00002A) for a full
>scale reading. Most of the current doesn't go through the meter, but
>through the shunt.
That's a pretty impressive meter but irrelevant. The fact is that
<sa...@dont.send.email.invalid> wrote:
>On 12/13/2013 05:28 PM, Irreverent Maximus wrote:
>>
>> "Metspitzer" <Kilo...@charter.net> wrote in message
>> news:cf2na95nktth1kpsr...@4ax.com...
>>
>>> Actually no. The current involved in house wiring is too high to put
>>> in series with a meter.
>>>
>>
>> Not if you are using a "rated" shunt meter. :-)
>
>The analog meters I've seen use as little as 20uA (.00002A) for a full
>scale reading. Most of the current doesn't go through the meter, but
>through the shunt.
almost all (every one you're likely to see) analog meters are current
meters at the root. The current in the coil creates the magnetic
field that moves the needle. From there, everything is scaled using
resistors into whatever voltage or current you wish to measure. A
shunt is just one such resistor used to scale the meter to measure
current. Pick your full-scale, calculate your shunt.
>IIRC, the current through a digital meter is MUCH less.
higher than an analog but you're convoluting two concepts.
>BTW, my multimeter has a 10A range (using a low-resistance shunt). That
>was one reason for choosing that meter (many were limited to 200mA).
>Later I got a clamp meter that measures AC current up to 400A.
>BTW2, have you ever used a clamp meter on DC?
cl...@snyder.on.ca
Dec 15, 2013, 3:47:20 PM12/15/13
to
On Sun, 15 Dec 2013 11:47:15 -0600, sam E
<sa...@dont.send.email.invalid> wrote:
<sa...@dont.send.email.invalid> wrote:
effect sensor instead of a current transformer.
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