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Can one plug a 110v tv into a 220 v outletl without doing any damage?

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micky

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Feb 23, 2022, 6:01:56 PM2/23/22
to
I have a friend who brought her 110v TV from the US to Europe when a
helpful neighbor plugged it straight into the wall. 220volts.

Is there any chance he did not damage it?

Is there any chance he only blew a fuse? Does this tv even have a
fuse? I googled for a schematic for it, didn't find a schematic, but
did find a video of someone checking that very model (I don't have the
link handy), finding one of the soldered in fusible resistors to be
blown, and replacing it. He didnt' say it was blown by 220 volts or
give any reason why it broke. Believe it or not, I take a screwdriver
and a VOM with me when I travel, and I'm willing to buy a soldering iron
and solder, if that will do it. It would save her a lot of money,
boost her image of me, and boost my ego.

It's a Toshiba 40RV525U made in 2008. 2008. 2.75 amps max.

She's not stupid at all but it's been months since this happened and I
think she's forgotten some details. The story is that her cousin's
friend checked it out and decided it was fine and just needed a
transformer. Internal? I dont' think so, so he must have meant a 220 to
110 transformer** but I may not be able to talk to him directly becaause
he's old and does not speak English. **But if that's it, why didn't my
friend try it when she got the TV back. She says she has 2 of them for
other appliances and just about any commercial step-down transformer
will power 2.75 amps, right? I thought she said he took it apart, but
now she says he didn't, so maybe he was just assuming it wasn't broken
and giving the generic answer when people ask about 110 volt appliances.
She's going to call him again, or maybe she said call her cousin.

She lives about 90 minutes from where I'll be. I expect to visit at
least a ccouple more times anyhow, but I'd like to come prepared to do
this in the minimum number of trips.

Rod Speed

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Feb 23, 2022, 6:18:23 PM2/23/22
to
micky <NONONO...@fmguy.com> wrote

> I have a friend who brought her 110v TV from the US to Europewhen a
> helpful neighbor plugged it straight into the wall. 220volts.

How did the neighbour manage that when the mains plug is different ?

> Is there any chance he did not damage it?

Yes, some modern TVs will accept anything from 80-240 volts and work fine.

> Is there any chance he only blew a fuse?

Yes, that is possible.

> Does this tv even have a fuse?

They all do, somewhere.

> I googled for a schematic for it, didn't find a schematic,

Yeah, those arent common at all.

> but did find a video of someone checking that very model (I don'thave
> the link handy), finding one of the soldered in fusible resistorsto be
> blown, and replacing it. He didnt' say it was blown by 220 voltsor give
> any reason why it broke. Believe it or not, I take a screwdriver
> and a VOM with me when I travel, and I'm willing to buy a solderingiron
> and solder, if that will do it. It would save her a lot of money,
> boost her image of me, and boost my ego.

> It's a Toshiba 40RV525U made in 2008. 2008. 2.75 amps max.

The specs on the Toshiba site should tell you the mains voltage it will
work with.

> She's not stupid at all but it's been months since this happened andI
> think she's forgotten some details. The story is that her cousin's
> friend checked it out and decided it was fine and just needed a
> transformer. Internal? I dont' think so, so he must have meant a 220 to
> 110 transformer** but I may not be able to talk to him directly becaause
> he's old and does not speak English. **But if that's it, why didn't my
> friend try it when she got the TV back. She says she has 2 of them for
> other appliances and just about any commercial step-down transformer
> will power 2.75 amps, right?

Yep.

Peeler

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Feb 23, 2022, 6:25:00 PM2/23/22
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On Thu, 24 Feb 2022 10:18:07 +1100, cantankerous trolling geezer Rodent
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hub...@ccanoemail.ca

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Feb 23, 2022, 7:08:47 PM2/23/22
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On Thu, 24 Feb 2022 01:01:44 +0200, micky <NONONO...@fmguy.com>
wrote:

>I have a friend who brought her 110v TV from the US to Europe when a
>helpful neighbor plugged it straight into the wall. 220volts.
>Is there any chance he did not damage it?
>Is there any chance he only blew a fuse? Does this tv even have a
>fuse?
>It's a Toshiba 40RV525U made in 2008. 2008. 2.75 amps max.
>

Power supply on ebay shows a fuse in the photo :

https://www.ebay.com/itm/Toshiba-40RV525U-Power-Supply-75013355-PK101V0830I-/263417775721?_trksid=p2349526.m4383.l4275.c3#viTabs_0

John T.


micky

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Feb 24, 2022, 3:56:35 PM2/24/22
to
In alt.home.repair, on Wed, 23 Feb 2022 19:10:57 -0500,
It sure does. That would be great if it were only the fuse. And by
golly, the seller is in Baltimore!!!! That's where I live. Of course
now the TV and I are 2000 miles away.

If it's worse than the fuse it would be worth buying the whole board for
$40. He wants 10 for shipping but I'm sure he'd want more to ship to
Europe. It would still be worth it. Tnx.

micky

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Feb 24, 2022, 4:00:26 PM2/24/22
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In alt.home.repair, on Thu, 24 Feb 2022 10:18:07 +1100, "Rod Speed"
<rod.sp...@gmail.com> wrote:

>micky <NONONO...@fmguy.com> wrote
>
>> I have a friend who brought her 110v TV from the US to Europewhen a
>> helpful neighbor plugged it straight into the wall. 220volts.
>
>How did the neighbour manage that when the mains plug is different ?

I'm sure he used an adapter. That's what I use for the laptop.

>> Is there any chance he did not damage it?
>
>Yes, some modern TVs will accept anything from 80-240 volts and work fine.

No, this was a 110 volt only tv, not -240. I know about 110 to 240, my
laptop and my phone chargers are that. But this is from 2008 and it's
110.

Any chance he did not damage it?

>> Is there any chance he only blew a fuse?
>
>Yes, that is possible.

That would be good.

>> Does this tv even have a fuse?
>
>They all do, somewhere.
>
>> I googled for a schematic for it, didn't find a schematic,
>
>Yeah, those arent common at all.
>
>> but did find a video of someone checking that very model (I don'thave
>> the link handy), finding one of the soldered in fusible resistorsto be
>> blown, and replacing it. He didnt' say it was blown by 220 voltsor give
>> any reason why it broke. Believe it or not, I take a screwdriver
>> and a VOM with me when I travel, and I'm willing to buy a solderingiron
>> and solder, if that will do it. It would save her a lot of money,
>> boost her image of me, and boost my ego.
>
>> It's a Toshiba 40RV525U made in 2008. 2008. 2.75 amps max.
>
>The specs on the Toshiba site should tell you the mains voltage it will
>work with.

The label on the back says 110 (or 120) I can't imagine it is designed
to work with 240 and they didn't say so on the back.

Rod Speed

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Feb 24, 2022, 7:34:00 PM2/24/22
to
micky <NONONO...@fmguy.com> wrote
> Rod Speed <rod.sp...@gmail.com> wrote
>> micky <NONONO...@fmguy.com> wrote

>>> I have a friend who brought her 110v TV from the US to Europewhen a
>>> helpful neighbor plugged it straight into the wall. 220volts.

>> How did the neighbour manage that when the mains plug is different ?

> I'm sure he used an adapter. That's what I use for the laptop.

>>> Is there any chance he did not damage it?

>> Yes, some modern TVs will accept anything from 80-240 volts and work
>> fine.

> No, this was a 110 volt only tv, not -240. I know about 110 to 240, my
> laptop and my phone chargers are that. But this is from 2008 and it's
> 110.

Some do have a voltage switch.

> Any chance he did not damage it?

Yes, some will just blow the fuse. But a
bit surprising no one checked the fuse.

>>> Is there any chance he only blew a fuse?

>> Yes, that is possible.

> That would be good.

>>> Does this tv even have a fuse?

>> They all do, somewhere.

>>> I googled for a schematic for it, didn't find a schematic,

>> Yeah, those aren't common at all.

>>> but did find a video of someone checking that very model (I don'thave
>>> the link handy), finding one of the soldered in fusible resistorsto be
>>> blown, and replacing it. He didnt' say it was blown by 220 voltsor
>>> give any reason why it broke. Believe it or not, I take a screwdriver
>>> and a VOM with me when I travel, and I'm willing to buy a solderingiron
>>> and solder, if that will do it. It would save her a lot of money,
>>> boost her image of me, and boost my ego.

>>> It's a Toshiba 40RV525U made in 2008. 2008. 2.75 amps max.

>> The specs on the Toshiba site should tell you the mains voltage it will
>> work with.

> The label on the back says 110 (or 120) I can't imagine it is designed
> to work with 240 and they didn't say so on the back.

True.

>>> She's not stupid at all but it's been months since this happened andI
>>> think she's forgotten some details. The story is that her cousin's
>>> friend checked it out and decided it was fine and just needed a
>>> transformer. Internal? I dont' think so, so he must have meant a 220
>>> to 110 transformer** but I may not be able to talk to him directly
>>> becaause
>>> he's old and does not speak English. **But if that's it, why didn't
>>> my
>>> friend try it when she got the TV back. She says she has 2 of them for
>>> other appliances and just about any commercial step-down transformer
>>> will power 2.75 amps, right?

>> Yep.

>>> I thought she said he took it apart, but
>>> now she says he didn't, so maybe he was just assuming it wasn't broken
>>> and giving the generic answer when people ask about 110 volt
>>> appliances.
>>> She's going to call him again, or maybe she said call her cousin.

>>> She lives about 90 minutes from where I'll be. I expect to visit at
>>> least a ccouple more times anyhow, but I'd like to come prepared to do
>>> this in the minimum number of trips.

You need a stepdown transformer and it would be safer to take the spare
power supply too.

Retirednoguilt

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Feb 24, 2022, 9:18:30 PM2/24/22
to
European countries encode TV signals for either PAL or SECAM. U.S.
countries (and TV's) use NTSC formatting. Without also using a HDMI
converter (and they are not cheap), the picture is likely to be blurry
at best and possibly not even watchable. I found this link, which may
be helpful:
https://goodhomeautomation.com/will-my-tv-work-in-europe/

Rod Speed

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Feb 24, 2022, 10:07:51 PM2/24/22
to
Retirednoguilt <Hapily...@fakeaddress.com> wrote
> micky wrote
>> hub...@ccanoemail.ca wrote
>>> micky <NONONO...@fmguy.com> wrote

>>>> I have a friend who brought her 110v TV from the US to Europe when a
>>>> helpful neighbor plugged it straight into the wall. 220volts.
>>>> Is there any chance he did not damage it?
>>>> Is there any chance he only blew a fuse? Does this tv even have a
>>>> fuse?
>>>> It's a Toshiba 40RV525U made in 2008. 2008. 2.75 amps max.
>>>>
>>>
>>> Power supply on ebay shows a fuse in the photo :
>>>
>>> https://www.ebay.com/itm/Toshiba-40RV525U-Power-Supply-75013355-PK101V0830I-/263417775721?_trksid=p2349526.m4383.l4275.c3#viTabs_0
>>>
>>> John T.
>> It sure does. That would be great if it were only the fuse. And by
>> golly, the seller is in Baltimore!!!! That's where I live. Of course
>> now the TV and I are 2000 miles away.
>> If it's worse than the fuse it would be worth buying the whole board
>> for
>> $40. He wants 10 for shipping but I'm sure he'd want more to ship to
>> Europe. It would still be worth it. Tnx.
>>
> European countries encode TV signals for either PAL or SECAM. U.S.
> countries (and TV's) use NTSC formatting. Without also using a HDMI
> converter (and they are not cheap), the picture is likely to be blurry
> at best and possibly not even watchable.

The world has moved on now with digital TV. That is ancient analog TV,
long gone now.

> I found this link, which may be helpful:
> https://goodhomeautomation.com/will-my-tv-work-in-europe/

Nope, its way out of date.

Bob F

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Feb 24, 2022, 11:51:54 PM2/24/22
to
I recently bought a 43" 4K UK TV used for cheap. It works fine plugged
into US 120V, but does not pick up US TV because of the different
system. It work perfectly through the HDMI inputs. I am using it as a
big monitor, so no problem.

Many electronics these days work fine on either 120V or 220V because of
the power supply designs. All you need is a plug converter.

Peeler

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Feb 25, 2022, 4:43:29 AM2/25/22
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Peeler

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Feb 25, 2022, 4:44:03 AM2/25/22
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micky

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Mar 3, 2022, 5:52:56 PM3/3/22
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In alt.home.repair, on Thu, 24 Feb 2022 20:51:44 -0800, Bob F
Many do, but if you read the start of the thread, you would think this
one doesn't. :-)

Working on answer to Retired

micky

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Mar 3, 2022, 6:05:34 PM3/3/22
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In alt.home.repair, on Fri, 25 Feb 2022 14:07:35 +1100, "Rod Speed"
I came back to this t hread to ask about 50 vs. 60cps. I had't thought
about PAL vs. NTSC yet. A big problem. OTOH, since she struggles
with any language other than English, maybe she plans to stream etc. and
not watch local cable. I will ask her.

She had a lot of help available planning this move, and I'm sure she
took advantage of it, but maybe this part was skipped or ignored or
forgotten later, and she just brought this big "beautiful" tv.
>
>The world has moved on now with digital TV. That is ancient analog TV,
>long gone now.

This tv has both NTSC and ATSC. and QAM.

Rod Speed

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Mar 3, 2022, 6:36:19 PM3/3/22
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micky <NONONO...@fmguy.com> wrote
That will be fine.

> I had't thought about PAL vs. NTSC yet. A big problem.

No, they have digital TV now, those are the analog standards.

> OTOH, since she struggles
> with any language other than English, maybe she plans to stream etc. and
> not watch local cable. I will ask her.

> She had a lot of help available planning this move, and I'm sure she
> took advantage of it, but maybe this part was skipped or ignored or
> forgotten later, and she just brought this big "beautiful" tv.

>> The world has moved on now with digital TV. That is ancient analog TV,
>> long gone now.
>
> This tv has both NTSC and ATSC. and QAM.

It will be fine with the digital TV,

Peeler

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Mar 4, 2022, 3:39:58 AM3/4/22
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Retirednoguilt

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Mar 4, 2022, 10:36:26 AM3/4/22
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From what I was able to view in the page information portion of my
browser, the original article was published in 2020 and edited in August
of 2021. I wouldn't exactly call it "way" out of date; if it is, what
does it make all of us? Fossils? I'm always interested in learning
more. What specific information in this article is incorrect and what's
the up to date correction?

micky

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Mar 4, 2022, 2:11:25 PM3/4/22
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In alt.home.repair, on Fri, 04 Mar 2022 10:36:04 +1100, "Rod Speed"
That sounds good. I plan to let you all know what happens.

trader_4

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Mar 6, 2022, 12:00:59 PM3/6/22
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The TV they show is modern, but the rest of it is either out of date or out
of touch or both:

"Yes, your TV will work in Europe as long as you have an adapter/converter to convert from 240 volts (Europe) to 120 volts (US). You can then stream content using apps on your TV. If want cable, you’ll additionally need an HDMI video format converter to convert the format to NTSC."

Convert HDMI to NTSC? What on earth for? Modern TVs have had HDMI input
now for a long time and they don't have NTSC input.

"Ultimately three standards were born, and they are still with us today: NTSC, PAL, & SECAM.

Every country in the world uses one of these three standards, and therefore your TV was built to work with one of them.

In the United States we use the NTSC format, whereas Europe uses either PAL or SECAM."

That's wrong too. The US has been using ATSC for all broadcast for about fifteen years now.
I'm pretty sure that a US TV isn't going to work to pick up over the air in Europe.
What kind of output their cable boxes have over there and if it's compatible with HDMI
on a US TV, IDK. Presumably you could stream over the internet just like you can here if
the TV has that built-in or you have Roku, etc streaming device.

TimR

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Mar 6, 2022, 8:37:31 PM3/6/22
to
On Sunday, March 6, 2022 at 12:00:59 PM UTC-5, trader_4 wrote:
> "Yes, your TV will work in Europe as long as you have an adapter/converter to convert from 240 volts (Europe) to 120 volts (US). You can then stream content using apps on your TV. If want cable, you’ll additionally need an HDMI video format converter to convert the format to NTSC."
>
> Convert HDMI to NTSC? What on earth for? Modern TVs have had HDMI input
> now for a long time and they don't have NTSC input.
>
> "Ultimately three standards were born, and they are still with us today: NTSC, PAL, & SECAM.
>
> Every country in the world uses one of these three standards, and therefore your TV was built to work with one of them.
>
> In the United States we use the NTSC format, whereas Europe uses either PAL or SECAM."
>
> That's wrong too. The US has been using ATSC for all broadcast for about fifteen years now.
> I'm pretty sure that a US TV isn't going to work to pick up over the air in Europe.
> What kind of output their cable boxes have over there and if it's compatible with HDMI
> on a US TV, IDK. Presumably you could stream over the internet just like you can here if
> the TV has that built-in or you have Roku, etc streaming device.

We lived in Germany from 2003 to 2008 courtesy of the Army. We brought an American TV which plugged into a transformer to convert 220 to 110, and it worked on the American Armed Forces stations via satellite. We also bought a German TV that could do all 3 standards and used it on the German satellite receiver.

micky

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Mar 13, 2022, 12:56:32 AM3/13/22
to
In alt.home.repair, on Sun, 6 Mar 2022 17:37:25 -0800 (PST), TimR
<timoth...@gmail.com> wrote:

>On Sunday, March 6, 2022 at 12:00:59 PM UTC-5, trader_4 wrote:
>> "Yes, your TV will work in Europe as long as you have an adapter/converter to convert from 240 volts (Europe) to 120 volts (US). You can then stream content using apps on your TV. If want cable, you’ll additionally need an HDMI video format converter to convert the format to NTSC."
>>
>> Convert HDMI to NTSC? What on earth for? Modern TVs have had HDMI input
>> now for a long time and they don't have NTSC input.
>>
>> "Ultimately three standards were born, and they are still with us today: NTSC, PAL, & SECAM.
>>
>> Every country in the world uses one of these three standards, and therefore your TV was built to work with one of them.
>>
>> In the United States we use the NTSC format, whereas Europe uses either PAL or SECAM."
>>
>> That's wrong too. The US has been using ATSC for all broadcast for about fifteen years now.
>> I'm pretty sure that a US TV isn't going to work to pick up over the air in Europe.
>> What kind of output their cable boxes have over there and if it's compatible with HDMI
>> on a US TV, IDK. Presumably you could stream over the internet just like you can here if
>> the TV has that built-in or you have Roku, etc streaming device.
>
>We lived in Germany from 2003 to 2008 courtesy of the Army.

I have heard that the Army is courteous.

>We brought an American TV which plugged into a transformer to convert 220 to 110,

There you go. I asked about this locally, not to electronics types but
those who had moved from the US or knew someone who had, and a couple
claimed there would be problems. Buy new!! There are always people
saying to do that. And it seems always people saying, "It won't work".

Remo Byers

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Sep 12, 2022, 5:52:44 AM9/12/22
to
If the device is rated only for 110v - 120v and you plug it into a 220v - 240v source, unless some protective device quickly cuts off the power, you will probably quickly realize that you should not have done it. The results could range from quiet destruction to dramatic fireworks and smoke.
https://re-rockspace-local.net/didactic-guide-to-fix-rockspace-wifi-extender-red-light-issue/

bruce bowser

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Sep 12, 2022, 6:44:01 AM9/12/22
to
On Wednesday, February 23, 2022 at 6:01:56 PM UTC-5, micky wrote:
>
> Can one plug a 110v tv into a 220 v outletl

Yes, because the outlet clearly can accept the plug. Notice how a 120 or a 220 volt outlet looks different from a 240 volt outlet or a 125/250 volt outlet or from a 20-Amp 3-Phase outlet. A 120 or 220 volt outlet looks like it can accept the plug, so you can plug it in.

bruce bowser

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Sep 12, 2022, 6:50:41 AM9/12/22
to
If the 120 or 1255 volt plug does NOT fit the 220volt outlet, then it won't work.

trader_4

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Sep 12, 2022, 7:35:11 AM9/12/22
to
If 220V is actually present at the receptacle and the TV is only capable of 120V, it will either
fry it or at a minimum blow the fuse. Presumably when one asks about plugging a 120V
device into a 220V receptacle, they mean using an adaptor. Plus in the US it's 240/120, not
220.

Ed Pawlowski

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Sep 12, 2022, 9:39:50 AM9/12/22
to
On 9/12/2022 7:35 AM, trader_4 wrote:

> If 220V is actually present at the receptacle and the TV is only capable of 120V, it will either
> fry it or at a minimum blow the fuse. Presumably when one asks about plugging a 120V
> device into a 220V receptacle, they mean using an adaptor. Plus in the US it's 240/120, not
> 220.

I remember as a kit it was referred to as 110/220. It used to be.

Nominal US voltage was 110/220 until the 1930s when it changed to
115/230, and changed again in the 1960s to 120/240 which it has been
since then. Some people are just resistant to change.

Mark Lloyd

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Sep 12, 2022, 1:02:21 PM9/12/22
to
A lot of older people say 110/220. It seems to mean the same thing as
120/240. I've also heard 115/230, 117/234, 118/236, and 125/250 (always
a 1:2 ratio),

BTW, I've measured it here. Almost exactly 120/240.

--
104 days until the winter celebration (Sunday, December 25, 2022
12:00:00 AM for 1 day).

Mark Lloyd
http://notstupid.us/

"Life after death" is an obvious contradiction, unless you're really
into "dynamic redefinition". The "life" that exists afterward COULDN'T
be the same one that just ended irreversibly by "death".

danny burstein

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Sep 12, 2022, 3:18:46 PM9/12/22
to
In <qCJTK.33643$x5w7...@fx42.iad> Mark Lloyd <not....@all.invalid> writes:

[snip]

>A lot of older people say 110/220. It seems to mean the same thing as
>120/240. I've also heard 115/230, 117/234, 118/236, and 125/250 (always
>a 1:2 ratio),

And, of course, 120/208 ...

(Don't ask)

--
_____________________________________________________
Knowledge may be power, but communications is the key
dan...@panix.com
[to foil spammers, my address has been double rot-13 encoded]

Marilyn Manson

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Sep 12, 2022, 3:47:32 PM9/12/22
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On Monday, September 12, 2022 at 3:18:46 PM UTC-4, danny burstein wrote:
> In <qCJTK.33643$x5w7...@fx42.iad> Mark Lloyd <not....@all.invalid> writes:
>
> [snip]
> >A lot of older people say 110/220. It seems to mean the same thing as
> >120/240. I've also heard 115/230, 117/234, 118/236, and 125/250 (always
> >a 1:2 ratio),
> And, of course, 120/208 ...
>
> (Don't ask)
>
Shouldn't you say "Don't ask" 3 times? ;-)

bruce bowser

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Sep 12, 2022, 3:51:18 PM9/12/22
to
On Monday, September 12, 2022 at 7:35:11 AM UTC-4, trader_4 wrote:
> On Monday, September 12, 2022 at 6:44:01 AM UTC-4, bruce bowser wrote:
> > On Wednesday, February 23, 2022 at 6:01:56 PM UTC-5, micky wrote:
> > >
> > > Can one plug a 110v tv into a 220 v outletl
> >
> > Yes, because the outlet clearly can accept the plug. Notice how a 120 or a 220 volt outlet looks different from a 240 volt outlet or a 125/250 volt outlet or from a 20-Amp 3-Phase outlet. A 120 or 220 volt outlet looks like it can accept the plug, so you can plug it in.
>
> If 220V is actually present at the receptacle and the TV is only capable of 120V, it will either
> fry it or at a minimum blow the fuse.

Not for me. I've accidentally used 120vclips at the panel between a phase and neutral and not had anything happen.

> Presumably when one asks about plugging a 120V device into a 220V receptacle, they
> mean using an adaptor. Plus in the US it's 240/120, not 220.

Sometimes at peak, sometimes not.

bruce bowser

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Sep 12, 2022, 3:57:13 PM9/12/22
to
On Monday, September 12, 2022 at 3:18:46 PM UTC-4, danny burstein wrote:
> In <qCJTK.33643$x5w7...@fx42.iad> Mark Lloyd <not....@all.invalid> writes:
>
> [snip]
> >A lot of older people say 110/220. It seems to mean the same thing as
> >120/240. I've also heard 115/230, 117/234, 118/236, and 125/250 (always
> >a 1:2 ratio),
> And, of course, 120/208 ...
>
> (Don't ask)

120/208 is usually OK for 120v. 208v merely lacks a neutral, but its OK. And many panels have current-limiting fuse capacity.

Mark Lloyd

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Sep 12, 2022, 5:15:13 PM9/12/22
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On 9/12/22 14:18, danny burstein wrote:
> In <qCJTK.33643$x5w7...@fx42.iad> Mark Lloyd <not....@all.invalid> writes:
>
> [snip]
>
>> A lot of older people say 110/220. It seems to mean the same thing as
>> 120/240. I've also heard 115/230, 117/234, 118/236, and 125/250 (always
>> a 1:2 ratio),
>
> And, of course, 120/208 ...
>
> (Don't ask)

for x/y, y = 2x * sin(120)

That also works with 277/480

The voltage marked on my AC outdoor unit (made in 2013) is 208/230

TimR

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Sep 12, 2022, 5:51:05 PM9/12/22
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We wired a housing area with 120/208 because we got a good deal on a bunch of AC units that needed 3 phase. I guess anyway, wasn't my decision. But I got the angry phone calls from people whose clothes dryers took forever, and ovens heated slowly. I wouldn't put 3 phase anywhere I didn't have to (in the US) because of problems with harmonics.

bud--

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Sep 12, 2022, 11:15:06 PM9/12/22
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On 9/12/2022 3:51 PM, TimR wrote:
> On Monday, September 12, 2022 at 3:57:13 PM UTC-4, bruce bowser wrote:
>> On Monday, September 12, 2022 at 3:18:46 PM UTC-4, danny burstein wrote:
>>> In <qCJTK.33643$x5w7...@fx42.iad> Mark Lloyd <not....@all.invalid> writes:
>>>
>>> [snip]
>>>> A lot of older people say 110/220. It seems to mean the same thing as
>>>> 120/240. I've also heard 115/230, 117/234, 118/236, and 125/250 (always
>>>> a 1:2 ratio),

I understand 120/s40 to be the "system" voltage - nominal voltage at the
service.

And 115/230 (or maybe 110/220) to be the "utilization" voltage - at the
equipment. Mark says his AC compressor/condenser is marked 208/230 (208
would be nominal system voltage - a violation of this convention, but I
don't remember seeing 200/115).

>>> And, of course, 120/208 ...
>>>
>>> (Don't ask >>
>> 120/208 is usually OK for 120v. 208v merely lacks a neutral, but its
OK. And many panels have current-limiting fuse capacity.

In a "208/120" volt 3-phase system "120" should always be good for 120.

A "current-limiting" fuse is fast acting, and for high current faults
melts and clears before the current reaches its first peak - the
let-through peak fault current is significantly lower than with a slower
fuse. Bussmann FRN fuses are common current-limiting cartridge fuses
that fit in normal cartridge fuse holders.

>
> We wired a housing area with 120/208 because we got a good deal on a bunch of AC units that needed 3 phase. I guess anyway, wasn't my decision. But I got the angry phone calls from people whose clothes dryers took forever, and ovens heated slowly. I wouldn't put 3 phase anywhere I didn't have to (in the US) because of problems with harmonics.
>

Some large apartments have 208/120 3-phase coming in and 2 phases go to
each apartment - 208/120. A 240V appliance on 208V will heat slower -
208/240=87% but the effect is squared - 75%. A relatively small
buck/boost transformer can boost to 240. A 240V motor shouldn't be used
on 208 unless the nameplate says 208/230.

Not obvious which harmonic problem. Some harmonics on different phases,
which can be caused by power supplies, can add on the neutral instead of
cancelling.

trader_4

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Sep 13, 2022, 8:08:24 AM9/13/22
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On Monday, September 12, 2022 at 3:51:18 PM UTC-4, bruce bowser wrote:
> On Monday, September 12, 2022 at 7:35:11 AM UTC-4, trader_4 wrote:
> > On Monday, September 12, 2022 at 6:44:01 AM UTC-4, bruce bowser wrote:
> > > On Wednesday, February 23, 2022 at 6:01:56 PM UTC-5, micky wrote:
> > > >
> > > > Can one plug a 110v tv into a 220 v outletl
> > >
> > > Yes, because the outlet clearly can accept the plug. Notice how a 120 or a 220 volt outlet looks different from a 240 volt outlet or a 125/250 volt outlet or from a 20-Amp 3-Phase outlet. A 120 or 220 volt outlet looks like it can accept the plug, so you can plug it in.
> >
> > If 220V is actually present at the receptacle and the TV is only capable of 120V, it will either
> > fry it or at a minimum blow the fuse.
> Not for me. I've accidentally used 120vclips at the panel between a phase and neutral and not had anything happen.

That's because that's 120V.
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