fuse rating question

Discussion in 'Electronic Basics' started by Paul, Feb 2, 2006.

1. PaulGuest

What is the difference between a 15A 125V and a 15A 32V fuse?

Microwave broke the other day. I was headed out to the pawn shop to buy
another. Money is tight. The I remembered to open it up to see if there was
a fuse. Yep, the fuse went. It was 15A 125V. Now, I suspect that it will
blow a replacement, but of course I want to check before I buy another oven.
I have several 15A 32V and several 15A No V listed. I also have 20A 32V, and
30A 32V.

Is there any way I can check it out without needlessly buying a new fuse? If
it does work, I will of course buy the proper fuse before putting her
together again. But can I test her using 32V 15A, 20A, or 30A?

Paul

Paul, Feb 2, 2006

2. Ralph MoweryGuest

"Paul" <> wrote in message
news:RLeEf.4632\$...
> What is the difference between a 15A 125V and a 15A 32V fuse?
>
> Microwave broke the other day. I was headed out to the pawn shop to buy
> another. Money is tight. The I remembered to open it up to see if there

was
> a fuse. Yep, the fuse went. It was 15A 125V. Now, I suspect that it will
> blow a replacement, but of course I want to check before I buy another

oven.
> I have several 15A 32V and several 15A No V listed. I also have 20A 32V,

and
> 30A 32V.
>
> Is there any way I can check it out without needlessly buying a new fuse?

If
> it does work, I will of course buy the proper fuse before putting her
> together again. But can I test her using 32V 15A, 20A, or 30A?
>
> Paul
>

The current ( 15 A in your case) is the maximum current the fuse will
normally carry before it opens up. You usually select that based on the
wire size or current the device the fuse is used in.

The voltage ( which should be 125 V in your case) is the maximum voltage the
fuse should be used at. If you put in the 32 V fuse , it is possiable that
the fuse could blow if the 15 amps is exceeded but instead of opening the
circuit, it will arc over and be about the same as if it never opened up.
Do not use any of the 32 V fuses. You can always put in a higher voltage
rated fues in. That is if you find a 250 volt fuse rated at 15 amps you can
us it at any voltage less than 250 volts. If you put in a 10 amp fuse , it
will probably blow and if you put in a 20 or 30 amp fuse, it may not blow or
if it does there may be major damage or a fire.

Ralph Mowery, Feb 2, 2006

3. PaulGuest

so you are saying what I suspected. That I need to spend the big bucks on a
fuse to see if it will work.

tks,
P
"Ralph Mowery" <> wrote in message
news:AWeEf.4636\$...
>
> "Paul" <> wrote in message
> news:RLeEf.4632\$...
>> What is the difference between a 15A 125V and a 15A 32V fuse?
>>
>> Microwave broke the other day. I was headed out to the pawn shop to buy
>> another. Money is tight. The I remembered to open it up to see if there

> was
>> a fuse. Yep, the fuse went. It was 15A 125V. Now, I suspect that it will
>> blow a replacement, but of course I want to check before I buy another

> oven.
>> I have several 15A 32V and several 15A No V listed. I also have 20A 32V,

> and
>> 30A 32V.
>>
>> Is there any way I can check it out without needlessly buying a new fuse?

> If
>> it does work, I will of course buy the proper fuse before putting her
>> together again. But can I test her using 32V 15A, 20A, or 30A?
>>
>> Paul
>>

>
> The current ( 15 A in your case) is the maximum current the fuse will
> normally carry before it opens up. You usually select that based on the
> wire size or current the device the fuse is used in.
>
> The voltage ( which should be 125 V in your case) is the maximum voltage
> the
> fuse should be used at. If you put in the 32 V fuse , it is possiable
> that
> the fuse could blow if the 15 amps is exceeded but instead of opening the
> circuit, it will arc over and be about the same as if it never opened up.
> Do not use any of the 32 V fuses. You can always put in a higher
> voltage
> rated fues in. That is if you find a 250 volt fuse rated at 15 amps you
> can
> us it at any voltage less than 250 volts. If you put in a 10 amp fuse ,
> it
> will probably blow and if you put in a 20 or 30 amp fuse, it may not blow
> or
> if it does there may be major damage or a fire.
>
>

Paul, Feb 2, 2006
4. Rich GriseGuest

On Thu, 02 Feb 2006 03:43:30 +0000, Paul wrote:

> so you are saying what I suspected. That I need to spend the big bucks on
> a fuse to see if it will work.
>

You should be able to get a fuse for pennies. If you know where to shop,
and how to look pathetic, somebody might even _give_ you one. ;-)

Good Luck!
Rich

Rich Grise, Feb 2, 2006
5. Jasen BettsGuest

On 2006-02-02, Paul <> wrote:
> What is the difference between a 15A 125V and a 15A 32V fuse?

32V fuses can't stop 110V, and may explode when pushed to try.

> Microwave broke the other day. I was headed out to the pawn shop to buy
> another. Money is tight. The I remembered to open it up to see if there was
> a fuse. Yep, the fuse went. It was 15A 125V. Now, I suspect that it will
> blow a replacement, but of course I want to check before I buy another oven.
> I have several 15A 32V and several 15A No V listed. I also have 20A 32V, and
> 30A 32V.
>
> Is there any way I can check it out without needlessly buying a new fuse? If
> it does work, I will of course buy the proper fuse before putting her
> together again. But can I test her using 32V 15A, 20A, or 30A?

a new fuse will be less expensive than replacing/refilling your fire
extinguisher.

--

Bye.
Jasen

Jasen Betts, Feb 2, 2006
6. PaulGuest

maybe in the good old days, but this here is corporate america. Death to the
local shop, who's owner you knew by name. I had to buy a pack of 3 for 4 \$
and have not tried it yet.

P
"Rich Grise" <> wrote in message
news...
> On Thu, 02 Feb 2006 03:43:30 +0000, Paul wrote:
>
>> so you are saying what I suspected. That I need to spend the big bucks on
>> a fuse to see if it will work.
>>

>
> You should be able to get a fuse for pennies. If you know where to shop,
> and how to look pathetic, somebody might even _give_ you one. ;-)
>
> Good Luck!
> Rich
>

Paul, Feb 3, 2006
7. PaulGuest

she works )

"Paul" <> wrote in message
news:QbCEf.10898\$...
> maybe in the good old days, but this here is corporate america. Death to
> the local shop, who's owner you knew by name. I had to buy a pack of 3 for
> 4 \$ and have not tried it yet.
>
> P
> "Rich Grise" <> wrote in message
> news...
>> On Thu, 02 Feb 2006 03:43:30 +0000, Paul wrote:
>>
>>> so you are saying what I suspected. That I need to spend the big bucks
>>> on
>>> a fuse to see if it will work.
>>>

>>
>> You should be able to get a fuse for pennies. If you know where to shop,
>> and how to look pathetic, somebody might even _give_ you one. ;-)
>>
>> Good Luck!
>> Rich
>>

>
>

Paul, Feb 3, 2006
8. PaulGuest

fire ext will be 20 years old this august and still does not need a
recharge.

"Jasen Betts" <> wrote in message
news:...
> On 2006-02-02, Paul <> wrote:
>> What is the difference between a 15A 125V and a 15A 32V fuse?

>
> 32V fuses can't stop 110V, and may explode when pushed to try.
>
>> Microwave broke the other day. I was headed out to the pawn shop to buy
>> another. Money is tight. The I remembered to open it up to see if there
>> was
>> a fuse. Yep, the fuse went. It was 15A 125V. Now, I suspect that it will
>> blow a replacement, but of course I want to check before I buy another
>> oven.
>> I have several 15A 32V and several 15A No V listed. I also have 20A 32V,
>> and
>> 30A 32V.
>>
>> Is there any way I can check it out without needlessly buying a new fuse?
>> If
>> it does work, I will of course buy the proper fuse before putting her
>> together again. But can I test her using 32V 15A, 20A, or 30A?

>
> a new fuse will be less expensive than replacing/refilling your fire
> extinguisher.
>
> --
>
> Bye.
> Jasen

Paul, Feb 3, 2006
9. Ralph MoweryGuest

"Paul" <> wrote in message
newszNEf.11237\$...
> fire ext will be 20 years old this august and still does not need a
> recharge.
>
> "Jasen Betts" <> wrote in message
> news:...
> > On 2006-02-02, Paul <> wrote:
> >> What is the difference between a 15A 125V and a 15A 32V fuse?

> >
> > 32V fuses can't stop 110V, and may explode when pushed to try.
> >
> >> Microwave broke the other day. I was headed out to the pawn shop to buy
> >> another. Money is tight. The I remembered to open it up to see if there
> >> was
> >> a fuse. Yep, the fuse went. It was 15A 125V. Now, I suspect that it

will
> >> blow a replacement, but of course I want to check before I buy another
> >> oven.
> >> I have several 15A 32V and several 15A No V listed. I also have 20A

32V,
> >> and
> >> 30A 32V.
> >>
> >> Is there any way I can check it out without needlessly buying a new

fuse?
> >> If
> >> it does work, I will of course buy the proper fuse before putting her
> >> together again. But can I test her using 32V 15A, 20A, or 30A?

> >
> > a new fuse will be less expensive than replacing/refilling your fire
> > extinguisher.
> >

Jasen ment that you may have to use the extinguisher to put out the fire the
wrong fuse may cause.

Also it may not need it but every so many years the extinguisher should be
checked and recharged. Not sure what the law or regulations are on this,
but do know that where I work they are inspected every month ( have to do
that myself on some of them) and every so often they are taken out and
replaced with fresh recharged units.

Ralph Mowery, Feb 3, 2006
10. John FieldsGuest

On Thu, 02 Feb 2006 03:11:45 GMT, "Paul"
<> wrote:

>What is the difference between a 15A 125V and a 15A 32V fuse?
>
>Microwave broke the other day. I was headed out to the pawn shop to buy
>another. Money is tight. The I remembered to open it up to see if there was
>a fuse. Yep, the fuse went. It was 15A 125V. Now, I suspect that it will
>blow a replacement, but of course I want to check before I buy another oven.
>I have several 15A 32V and several 15A No V listed. I also have 20A 32V, and
>30A 32V.
>
>Is there any way I can check it out without needlessly buying a new fuse? If
>it does work, I will of course buy the proper fuse before putting her
>together again. But can I test her using 32V 15A, 20A, or 30A?

---
Check what's downstream from the fuse. More than likely a rectifier
in the power supply. If you find a bad one, replace it and try
again.

--
John Fields
Professional Circuit Designer

John Fields, Feb 3, 2006
11. John FieldsGuest

On Fri, 03 Feb 2006 18:48:03 GMT, "Paul"
<> wrote:

>fire ext will be 20 years old this august and still does not need a
>recharge.

---
Maybe the gauge is stuck...

--
John Fields
Professional Circuit Designer

John Fields, Feb 3, 2006
12. Phil AllisonGuest

"John Fields"

> Check what's downstream from the fuse. More than likely a rectifier
> in the power supply. If you find a bad one, replace it and try
> again.

Microwave ovens are killers.

NEVER suggest that a novice meddle with one.

......... Phil

Phil Allison, Feb 3, 2006
13. John FieldsGuest

On Sat, 4 Feb 2006 09:21:57 +1100, "Phil Allison"
<> wrote:

>
>"John Fields"
>
>> Check what's downstream from the fuse. More than likely a rectifier
>> in the power supply. If you find a bad one, replace it and try
>> again.

>
>
>
>Microwave ovens are killers.
>
>NEVER suggest that a novice meddle with one.

---
How do you think that novices get to be experts?

shouldn't do?

I don't think so, ya goddam pussy.

Just think, would us humans have actually walked on our moon if
you'd have been in charge of the mission?

No. Probably because Mum would have told you that it was _much_ too
dangerous and _no one_ should try it, and you never really got to
cut the cord.

If the fuse is gone, then to find out whether it's the fuse's fault
or not, _passively_ probe what's downstream from the fuse. If you
find something that's obviously bad, replace it, fit a new fuse and
fire it up. If it blows the fuse again, then there's more to it
than a novice can be expected to contend with and the effort should
be relegated to more competent hands. Or, as seems to be the trend
lately, throw it away and get a new one.

In any case, bugger you, you ignorant piece of shit.

--
John Fields
Professional Circuit Designer

John Fields, Feb 3, 2006
14. Phil AllisonGuest

"John Fields
"Phil Allison"
>
>>> Check what's downstream from the fuse. More than likely a rectifier
>>> in the power supply. If you find a bad one, replace it and try
>>> again.

>>
>>
>>
>>Microwave ovens are killers.
>>
>>NEVER suggest that a novice meddle with one.

>
>
> How do you think that novices get to be experts?

** First of all, by staying alive !!

You fucking ** CRIMINAL IDIOT ** !!!!

> shouldn't do?
>
> I don't think so, ya goddam pussy.

** Fields - YOU are one GROSSLY irresponsible ASS !!!!!

A real " Texas Cowboy " with shit for brains.

> In any case, bugger you, you ignorant piece of shit.

** Buggery is YOUR speciality - isn't it ???

Cowboy.

" John Fields
Professional Fuckwit "

** Now it reads just right.

.......... Phil

Phil Allison, Feb 3, 2006
15. PaulGuest

>
> Jasen ment that you may have to use the extinguisher to put out the fire
> the
> wrong fuse may cause.
>

I realized that.

Paul, Feb 4, 2006
16. John FieldsGuest

On Sat, 4 Feb 2006 10:48:29 +1100, "Phil Allison"
<> wrote:

>
>"John Fields
> "Phil Allison"
>>
>>>> Check what's downstream from the fuse. More than likely a rectifier
>>>> in the power supply. If you find a bad one, replace it and try
>>>> again.
>>>
>>>
>>>
>>>Microwave ovens are killers.
>>>
>>>NEVER suggest that a novice meddle with one.

>>
>>
>> How do you think that novices get to be experts?

>
>
>** First of all, by staying alive !!

---
In your case, it seems, by listening to Mum and taking no risks
whatever, which certainly doesn't qualify you as an expert on
anything but sucking tit.
---

>You fucking ** CRIMINAL IDIOT ** !!!!

---
Yawnnnn...

Got some evidence?

If not, you need to shut up unless you're prepared to go technical.

Pretty scary, huh?

Since you don't know what you're talking about, in the first place,
"Forget it, it's too dangerous".

Is seems to me that that's the battle cry of the legion of cowards,
of which you seem to be a founding member.
---

>> shouldn't do?
>>
>> I don't think so, ya goddam pussy.

>
>
>** Fields - YOU are one GROSSLY irresponsible ASS !!!!!
>
> A real " Texas Cowboy " with shit for brains.

---
If I subscribed to your prattle, I would be.

However, since your rhetoric has proven its underlying logic to be
fault-ridden and your stance to be less than that of, let's say, a
dog bitch looking for a meal, it's not likely that you'll be taken
seriously.
---

>> In any case, bugger you, you ignorant piece of shit.

>
>
>** Buggery is YOUR speciality - isn't it ???
>
> Cowboy.

---
Actually, no.

I just thought I'd interject something you'd be familiar with in
order to keep the thread going.
---

>" John Fields
>Professional Fuckwit "

> ** Now it reads just right.

---
How clever of you to be able to edit a dotsig...

Just think, if you can somehow pull it off, all of everyone else's
pithy sayings will be attributed to you, even if you can't fathom
their meanings.

--
John Fields
Professional Circuit Designer

John Fields, Feb 4, 2006
17. Phil AllisonGuest

"John Fields" = RECKLESS ASSHOLE

Microwave ovens are killers.

NEVER suggest that a *novice* meddle with one.

----------------------------------------------------------

John Fields IS a GROSSLY irresponsible ASS !!!!

A real " Texas Cowboy " with shit for brains.

** A CRIMINALLY RECKLESS IDIOT ** !!!

" John Fields
Professional Fuckwit "

** Now it reads just right.

Should be marked on his tombstone - ASAP.

......... Phil

Phil Allison, Feb 5, 2006
18. Don BoweyGuest

On 2/4/06 10:28 PM, in article , "Phil Allison"
<> wrote:

>
> "John Fields" = RECKLESS ASSHOLE
>
>
>
> Microwave ovens are killers.
>
> NEVER suggest that a *novice* meddle with one.
>
> ----------------------------------------------------------
>
>
> John Fields IS a GROSSLY irresponsible ASS !!!!
>
> A real " Texas Cowboy " with shit for brains.
>
> ** A CRIMINALLY RECKLESS IDIOT ** !!!
>
>
>
>
> " John Fields
> Professional Fuckwit "
>
>
> ** Now it reads just right.
>
> Should be marked on his tombstone - ASAP.
>
>
>
>
> ........ Phil
>
>
>

Don Bowey, Feb 5, 2006
19. John FieldsGuest

On Sun, 05 Feb 2006 09:27:47 -0800, Don Bowey <>
wrote:

>On 2/4/06 10:28 PM, in article , "Phil Allison"
><> wrote:
>
>>
>> "John Fields" = RECKLESS ASSHOLE
>>
>>
>>
>> Microwave ovens are killers.
>>
>> NEVER suggest that a *novice* meddle with one.
>>

>>
>>
>> John Fields IS a GROSSLY irresponsible ASS !!!!
>>
>> A real " Texas Cowboy " with shit for brains.
>>
>> ** A CRIMINALLY RECKLESS IDIOT ** !!!
>>
>>
>>
>>
>> " John Fields
>> Professional Fuckwit "
>>
>>
>> ** Now it reads just right.
>>
>> Should be marked on his tombstone - ASAP.
>>
>>
>>
>>
>> ........ Phil
>>
>>
>>

>

---
"Inciteful" is closer to the truth.

--
John Fields
Professional Circuit Designer

John Fields, Feb 5, 2006
20. PaulGuest

ok, so now my microwave works, as I already posted.

I have been using it with the cover off. I just noticed 4 1/4 holes on the
top of the heating cavity. They are not arraigned symmetrically. This was
made overseas, but they are between 6 and 7 mm in size. So, when I cook
something, I am pushing microwaves into my atmosphere. How far can they
travel? And can I out run them?

P

Paul, Feb 5, 2006