justjunque
Well-known member
Hey Alex.
It's a Model R-5H82.
Here's a crappy picture.
It's a Model R-5H82.
Here's a crappy picture.
REQUIEM FOR A MICROWAVE OVEN?
- Thread starter normadesmond
- Start date
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Reply 16 and 17
As usual chet you have no practical experience, automotive fuses are typically rated at 250 V, there is no surge of power when you turn on a microwave, plug it into your amp meter and watch. The current drawl goes up slowly it is nothing like a motor starting most electrical devices do not have a surge when they start lightbulbs, heating elements, etc. all draw less current the instant they start.
Microwave ovens, do not require special fuses, Toshiba microwaves, used plane, glass, fuses, for example.
I know of more than a dozen repair people who look at this site occasionally but very few will get involved and offer advice because of people like you chet, it’s obvious why you have to remain anonymous. You told me yourself that you often bullied and I can see why because you just spew out misinformation from behind your computer that doesn’t have anything to do with what’s been discussed.
As usual chet you have no practical experience, automotive fuses are typically rated at 250 V, there is no surge of power when you turn on a microwave, plug it into your amp meter and watch. The current drawl goes up slowly it is nothing like a motor starting most electrical devices do not have a surge when they start lightbulbs, heating elements, etc. all draw less current the instant they start.
Microwave ovens, do not require special fuses, Toshiba microwaves, used plane, glass, fuses, for example.
I know of more than a dozen repair people who look at this site occasionally but very few will get involved and offer advice because of people like you chet, it’s obvious why you have to remain anonymous. You told me yourself that you often bullied and I can see why because you just spew out misinformation from behind your computer that doesn’t have anything to do with what’s been discussed.
WHOA!
WELL!
Seems there's been a flurry of opinion since I last checked in.
Sadly, I threw the old fuse away & the trash is out for pickup tomorrow so that's that. What I can say is the old fuse, though looking like a Buss fuse, was different in that the middle portion that is glass on the Buss may have been ceramic. I thought it was dirty after 40+ years. It was yellow-ish and not clear.
Now, for me, the problem is I don't understand much of what was written and am now confused. What will happen if I use the oven?
WELL!
Seems there's been a flurry of opinion since I last checked in.
Sadly, I threw the old fuse away & the trash is out for pickup tomorrow so that's that. What I can say is the old fuse, though looking like a Buss fuse, was different in that the middle portion that is glass on the Buss may have been ceramic. I thought it was dirty after 40+ years. It was yellow-ish and not clear.
Now, for me, the problem is I don't understand much of what was written and am now confused. What will happen if I use the oven?
<blockquote>
<span style="color: #ff0000;"><span style="color: #ffcc99;">As usual chet you have no practical experience, automotive fuses are typically rated at 250 V, </span></span>
</blockquote>
"Typically"
You don't assume. You read the product listing. While following the manufacturer's prescriptions. I also stated that voltage isn't the only governing factor but in addition to short circuit interrupting current and applicable time current curves.
The goal is that the fuse blows without failing violently.
I have no doubt you've been installing none OEM fuses in microwave ovens for 50 years without penalty or knowing any better. But that doesn't mean its ever been OK.
<blockquote>
there is no surge of power when you turn on a microwave, plug it into your amp meter and watch. The current drawl goes up slowly it is nothing like a motor starting most electrical devices do not have a surge when they start lightbulbs, heating elements, etc. all draw less current the instant they start.
</blockquote>
An amp meter averages its input data over a given period of time. An actual oscilloscope would capture upwards of 10x current draw for a few cycles that steadily decays with time, dropping down to the transformer's normal magnetizing + magnetron filament current current roughly 20 cycles latter. The current would would be at about 1 amp primary. At around 1.5 seconds the current would steadily yet rapidly begin to increase as the filament becomes hot enough to emit electrons eventually stabilizing around the microwaves normal input current.
You are correct a magnetron gradually increases its intake of current if you choose to ignore a step up transformers inrush current. Why is inrush current important? Because inrush blows fuses and trips breakers when it brushes up or crosses an over current protective device's time current curve.
Your line of denial based thinking has never boded well in the real world. Like the case where an engineer didn't take the full magnetizing inrush of various 45-250kva 480 to 208Y/120 volt step down transformers on on the essential electrical system in a hospital. Power goes out, emergency generator starts, ATSs begin transferring branches to and from emergency power. Magnetizing inrush of various dry type transformers on each floor exceeds the instantaneous settings on various 480 volt breakers tripping them leaving critical and life safety branches de-energized. ORs, ICU, emergency rooms, hospice beds and the like left in the dark. Code grey isn't something pretty nor would any engineer want to take blame for it.
<blockquote>
Microwave ovens, do not require special fuses, Toshiba microwaves, used plane, glass, fuses, for example.
</blockquote>
There are many that do require special fuses, hence why manufacturers place ceramic fuses in a large percentage of microwave ovens. This is based on UL standards and engineering equations which take each ovens unique electrical characteristics into account. Fault current, let through current, conductor withstand, inrush, temperature, risk, ect, ect.
<blockquote>
I know of more than a dozen repair people who look at this site occasionally but very few will get involved and offer advice because of people like you chet, it’s obvious why you have to remain anonymous. You told me yourself that you often bullied and I can see why because you just spew out misinformation from behind your computer that doesn’t have anything to do with what’s been discussed.
</blockquote>
Of course you misinterpret my posts as misinformation not having anything to do with whats being discussed. That is a given when you have shown a protracted inability to grasp electrical theory. If you understood electrical theory you would understand why you can't just put any fuse in place of another.
Funny you bring up me being mistreated. Have a look at (yet again) another Google review:
Slow down, listen and let people speak. Just because you read selectively (be it my posts on here or a someone's texts/email/letter) doesn't mean that holds true in reality.
[this post was last edited: 10/3/2023-00:18]
<span style="color: #ff0000;"><span style="color: #ffcc99;">As usual chet you have no practical experience, automotive fuses are typically rated at 250 V, </span></span>
</blockquote>
"Typically"
You don't assume. You read the product listing. While following the manufacturer's prescriptions. I also stated that voltage isn't the only governing factor but in addition to short circuit interrupting current and applicable time current curves.
The goal is that the fuse blows without failing violently.
I have no doubt you've been installing none OEM fuses in microwave ovens for 50 years without penalty or knowing any better. But that doesn't mean its ever been OK.
<blockquote>
there is no surge of power when you turn on a microwave, plug it into your amp meter and watch. The current drawl goes up slowly it is nothing like a motor starting most electrical devices do not have a surge when they start lightbulbs, heating elements, etc. all draw less current the instant they start.
</blockquote>
An amp meter averages its input data over a given period of time. An actual oscilloscope would capture upwards of 10x current draw for a few cycles that steadily decays with time, dropping down to the transformer's normal magnetizing + magnetron filament current current roughly 20 cycles latter. The current would would be at about 1 amp primary. At around 1.5 seconds the current would steadily yet rapidly begin to increase as the filament becomes hot enough to emit electrons eventually stabilizing around the microwaves normal input current.
You are correct a magnetron gradually increases its intake of current if you choose to ignore a step up transformers inrush current. Why is inrush current important? Because inrush blows fuses and trips breakers when it brushes up or crosses an over current protective device's time current curve.
Your line of denial based thinking has never boded well in the real world. Like the case where an engineer didn't take the full magnetizing inrush of various 45-250kva 480 to 208Y/120 volt step down transformers on on the essential electrical system in a hospital. Power goes out, emergency generator starts, ATSs begin transferring branches to and from emergency power. Magnetizing inrush of various dry type transformers on each floor exceeds the instantaneous settings on various 480 volt breakers tripping them leaving critical and life safety branches de-energized. ORs, ICU, emergency rooms, hospice beds and the like left in the dark. Code grey isn't something pretty nor would any engineer want to take blame for it.
<blockquote>
Microwave ovens, do not require special fuses, Toshiba microwaves, used plane, glass, fuses, for example.
</blockquote>
There are many that do require special fuses, hence why manufacturers place ceramic fuses in a large percentage of microwave ovens. This is based on UL standards and engineering equations which take each ovens unique electrical characteristics into account. Fault current, let through current, conductor withstand, inrush, temperature, risk, ect, ect.
<blockquote>
I know of more than a dozen repair people who look at this site occasionally but very few will get involved and offer advice because of people like you chet, it’s obvious why you have to remain anonymous. You told me yourself that you often bullied and I can see why because you just spew out misinformation from behind your computer that doesn’t have anything to do with what’s been discussed.
</blockquote>
Of course you misinterpret my posts as misinformation not having anything to do with whats being discussed. That is a given when you have shown a protracted inability to grasp electrical theory. If you understood electrical theory you would understand why you can't just put any fuse in place of another.
Funny you bring up me being mistreated. Have a look at (yet again) another Google review:
Slow down, listen and let people speak. Just because you read selectively (be it my posts on here or a someone's texts/email/letter) doesn't mean that holds true in reality.
[this post was last edited: 10/3/2023-00:18]
@normadesmond
Honestly probably nothing. However if the fuse is ever called to blow from a bad door switch it may burst inside the oven. Doubt anyone would be injured, but may cause a small internal fire, damage around the vicinity of the fuse holder and to the oven wiring itself.
I did not mean to confuse. Point I'm trying to make is that if the oven previously had a ceramic fuse from the manufacturer, the new fuse should also be ceramic.
An OEM ceramic Whirlpool or GE fuse for $10 would suffice.
Honestly probably nothing. However if the fuse is ever called to blow from a bad door switch it may burst inside the oven. Doubt anyone would be injured, but may cause a small internal fire, damage around the vicinity of the fuse holder and to the oven wiring itself.
I did not mean to confuse. Point I'm trying to make is that if the oven previously had a ceramic fuse from the manufacturer, the new fuse should also be ceramic.
An OEM ceramic Whirlpool or GE fuse for $10 would suffice.
<blockquote>
"most electrical devices do not have a surge when they start lightbulbs, heating elements, etc. all draw less current the instant they start."
</blockquote>
<blockquote>
<span style="color: #ff9900;">"you just spew out misinformation from behind your computer"</span>
</blockquote>
A simple Google search literally says the opposite of what you said John, while vindicating what I said.
There is indeed a 15x surge of current according to Google.
Anyone can ohm out a cold 100 watt light bulb if they believe Google is inaccurate...
I normally don't address trivial semantics however I do not want other members to think I am spreading misinformation. That is not my the case. John you have a very power voice on here, many members take your word as incontestable truth, however this is not one of those cases.
Can we at least agree on this?
"most electrical devices do not have a surge when they start lightbulbs, heating elements, etc. all draw less current the instant they start."
</blockquote>
<blockquote>
<span style="color: #ff9900;">"you just spew out misinformation from behind your computer"</span>
</blockquote>
A simple Google search literally says the opposite of what you said John, while vindicating what I said.
There is indeed a 15x surge of current according to Google.
Anyone can ohm out a cold 100 watt light bulb if they believe Google is inaccurate...
I normally don't address trivial semantics however I do not want other members to think I am spreading misinformation. That is not my the case. John you have a very power voice on here, many members take your word as incontestable truth, however this is not one of those cases.
Can we at least agree on this?
On 10/1/2023 at 20:13 normadesmond wrote the following:
"...I'm electrically challenged..."
"...I'm electrically challenged..."
Passaic man killed after being electrocuted while fixing microwave
Omar Lopez was pronounced dead at the scene after he was electrocuted by his microwave.
www.northjersey.com
mark_wpduet
Well-known member
It's staggering to think these things can last that long... and then when you think it's gone...it really isn't gone....
HA!
White Whiskers- Roz Chast knows my DNA. Intimately.
White Whiskers- Roz Chast knows my DNA. Intimately.
Glass automotive fuses are generally rated for 32 volts.
panasonicvac
Well-known member
Reply #19
Very cool! I'm a huge fan of Sharp Carousels. I wish we had a Sharp or two in our house growing up, instead we have two Amana Radaranges (one has since been in storage). But we did however had a Sharp up at our last cabin, I wished we took it back home with us because it was my favorite.
Very cool! I'm a huge fan of Sharp Carousels. I wish we had a Sharp or two in our house growing up, instead we have two Amana Radaranges (one has since been in storage). But we did however had a Sharp up at our last cabin, I wished we took it back home with us because it was my favorite.
panasonicvac
Well-known member
Reply #11
I also would like to testify that I'm a huge fan of Panasonic! That's one of the reasons why I named my username after it
Grew up with their electronics such as televisions, speakers, cameras, etc. My favorite are their vacuum cleaners, I believe they're one of the greatest vacuum companies ever. And so are their microwaves as well. If I didn't had a Sharp Carousel in my house, I would've had a Panasonic as my next choice because I know I like Sharp Carousels more.
I also would like to testify that I'm a huge fan of Panasonic! That's one of the reasons why I named my username after it
Grew up with their electronics such as televisions, speakers, cameras, etc. My favorite are their vacuum cleaners, I believe they're one of the greatest vacuum companies ever. And so are their microwaves as well. If I didn't had a Sharp Carousel in my house, I would've had a Panasonic as my next choice because I know I like Sharp Carousels more.All the back and forth aside, just use the specified fuse printed on the label on the circuit board. -or it's modern equivalent-
All's well that ends well?
Took her cover off again & popped over to Home Depot. I'm going to presume that what I've bought is the right thing. It better be because it's a bit of a pain getting it down & I'm done!!
Again, thanks for the priceless advise & help.
Panasonicvac- I had a Panasonic vacuum & I loved it. I'll never forgive myself that years ago the vac didn't seem to be working so I traded it for something else. I was dumb then, didn't realize I just needed a new roller. No doubt it's still going strong somewhere.
Here's my old TV & clock radio . . .
Took her cover off again & popped over to Home Depot. I'm going to presume that what I've bought is the right thing. It better be because it's a bit of a pain getting it down & I'm done!!
Again, thanks for the priceless advise & help.
Panasonicvac- I had a Panasonic vacuum & I loved it. I'll never forgive myself that years ago the vac didn't seem to be working so I traded it for something else. I was dumb then, didn't realize I just needed a new roller. No doubt it's still going strong somewhere.
Here's my old TV & clock radio . . .
For those members that are partial to Sharp Carousel MW’s the Magic Chef MW’s sold by Home Depot are made by Sharp.
About 7 years ago when my Sharp MW conked out I looked high and low for another white Sharp MW and there were none to be had. Finally the last store I stopped in was Home Depot and I noticed that their .7 cu Magic Chef MW looked exactly like my dead Sharp MW at home. The salesman on duty noticed me looking at it and I asked him if it was made by Sharp? He said yes! I said SOLD! I paid $59.83+ tax.
When I got it home and unpacked it and plugged it in I was so pleased! It is exactly like the old Sharp that it replaced. I don’t know if their larger MW’s are also made by Sharp, but my 1.1cu Magic Chef is just the right size for my needs and at $59.83 a great deal.
Eddie[this post was last edited: 10/3/2023-18:41]
About 7 years ago when my Sharp MW conked out I looked high and low for another white Sharp MW and there were none to be had. Finally the last store I stopped in was Home Depot and I noticed that their .7 cu Magic Chef MW looked exactly like my dead Sharp MW at home. The salesman on duty noticed me looking at it and I asked him if it was made by Sharp? He said yes! I said SOLD! I paid $59.83+ tax.
When I got it home and unpacked it and plugged it in I was so pleased! It is exactly like the old Sharp that it replaced. I don’t know if their larger MW’s are also made by Sharp, but my 1.1cu Magic Chef is just the right size for my needs and at $59.83 a great deal.
Eddie[this post was last edited: 10/3/2023-18:41]
panasonicvac
Well-known member
From my understanding
If a Sharp microwave is made in Thailand, then it's made by Sharp themselves. But if it's made in China, then it's made by Midea. They used to be made here in Sharp's Memphis, TN plant at one point like this yellow R-4S1FH for example.
If a Sharp microwave is made in Thailand, then it's made by Sharp themselves. But if it's made in China, then it's made by Midea. They used to be made here in Sharp's Memphis, TN plant at one point like this yellow R-4S1FH for example.
panasonicvac
Well-known member
Reply #32
Out of curiosity, what did your old Panasonic vacuum looked like? Do you remember the model or color at least?
Out of curiosity, what did your old Panasonic vacuum looked like? Do you remember the model or color at least?
Re: #33
I checked the back of my Magic Chef MW and it was made in China. The receipt has 10-30-15 as the date of purchase. The wattage is 1100.
Eddie
I checked the back of my Magic Chef MW and it was made in China. The receipt has 10-30-15 as the date of purchase. The wattage is 1100.
Eddie
@normadesmond: That's it! You have the right fuse
Eaton is the most reputable manufacturer in the industry. Those Bussman fuses are 100% genuine. Both UL and CSA listed and will safely interrupt 125 volts at 10,000 amps.
Put the wrapper back on and rest assured now.
Data sheet if anyone is interested:
Eaton is the most reputable manufacturer in the industry. Those Bussman fuses are 100% genuine. Both UL and CSA listed and will safely interrupt 125 volts at 10,000 amps.
Put the wrapper back on and rest assured now.
Data sheet if anyone is interested:
Loading…
www.eaton.com
panasonicvac
Well-known member
Reply #36
Then yours was made by Midea. Now that you shared a picture of it, there's no doubt in my mind. This video pretty much explains why almost all microwaves are made by Midea nowadays.
Then yours was made by Midea. Now that you shared a picture of it, there's no doubt in my mind. This video pretty much explains why almost all microwaves are made by Midea nowadays.
