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What size breaker and wire for a 5200W wall oven?
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Brent
Sep 20, 2016, 12:14:05 PM9/20/16
to
What size breaker and wire do I need to use for a new installation (not new
oven) of a 5200W wall oven.
2 lines of text for electrical.
120/240 VAC. 60HZ. 5.2KW. 3 WIRE
120/208 VAC. 60HZ. 3.95KW. 3 WIRE
Current wires coming out of the oven are 3 at 12 AWG black, red, green, and a
16 AWG white. I am not sure if they are original to the oven or not.
I couldn't find the manual online. I acquired this oven used.
--
for full context, visit http://www.homeownershub.com/maintenance/what-size-breaker-and-wire-for-a-5200w-wall-oven-903979-.htm
oven) of a 5200W wall oven.
2 lines of text for electrical.
120/240 VAC. 60HZ. 5.2KW. 3 WIRE
120/208 VAC. 60HZ. 3.95KW. 3 WIRE
Current wires coming out of the oven are 3 at 12 AWG black, red, green, and a
16 AWG white. I am not sure if they are original to the oven or not.
I couldn't find the manual online. I acquired this oven used.
--
for full context, visit http://www.homeownershub.com/maintenance/what-size-breaker-and-wire-for-a-5200w-wall-oven-903979-.htm
gfre...@aol.com
Sep 20, 2016, 12:46:43 PM9/20/16
to
30a based on a 21.66a load (5200/240) but the real answer is in the
installation manual. My new GE oven calls for a 20. It may not have
the same power elements in it tho.
installation manual. My new GE oven calls for a 20. It may not have
the same power elements in it tho.
Scott Lurndal
Sep 20, 2016, 12:47:31 PM9/20/16
to
Brent <caedfaa9ed1216d60ef...@example.com> writes:
>What size breaker and wire do I need to use for a new installation (not new
>oven) of a 5200W wall oven.
>
>2 lines of text for electrical.
>120/240 VAC. 60HZ. 5.2KW. 3 WIRE
>120/208 VAC. 60HZ. 3.95KW. 3 WIRE
>
>Current wires coming out of the oven are 3 at 12 AWG black, red, green, and a
>16 AWG white. I am not sure if they are original to the oven or not.
>I couldn't find the manual online. I acquired this oven used.
>
P = VA
>What size breaker and wire do I need to use for a new installation (not new
>oven) of a 5200W wall oven.
>
>2 lines of text for electrical.
>120/240 VAC. 60HZ. 5.2KW. 3 WIRE
>120/208 VAC. 60HZ. 3.95KW. 3 WIRE
>
>Current wires coming out of the oven are 3 at 12 AWG black, red, green, and a
>16 AWG white. I am not sure if they are original to the oven or not.
>I couldn't find the manual online. I acquired this oven used.
>
A = V/P
12AWG is insufficient at 208 or 240VAC.
Fred McKenzie
Sep 20, 2016, 1:10:17 PM9/20/16
to
In article <97052$57e16049$a2d350aa$14...@news.flashnewsgroups.com>,
Red and Black wires should go to each side of 240 VAC, White should go
to Neutral or Common, and Green should go to the metal frame. But you
need to verify how the wires are connected inside the oven, or you could
have a serious problem.
Your oven would draw 21.7 Amperes for 5200 Watts. A dual 25 Amp breaker
should be OK unless there is a 120 VAC outlet. In that case, I'd go for
a bigger breaker.
I'm not familiar with the codes that specify required wire size. 12 AWG
might be OK for 30 Amps, but I would prefer 10 AWG.
Fred
Brent <caedfaa9ed1216d60ef...@example.com> wrote:
> What size breaker and wire do I need to use for a new installation (not new
> oven) of a 5200W wall oven.
>
> 2 lines of text for electrical.
> 120/240 VAC. 60HZ. 5.2KW. 3 WIRE
> 120/208 VAC. 60HZ. 3.95KW. 3 WIRE
>
> Current wires coming out of the oven are 3 at 12 AWG black, red, green, and a
> 16 AWG white. I am not sure if they are original to the oven or not.
> I couldn't find the manual online. I acquired this oven used.
Brent-
> What size breaker and wire do I need to use for a new installation (not new
> oven) of a 5200W wall oven.
>
> 2 lines of text for electrical.
> 120/240 VAC. 60HZ. 5.2KW. 3 WIRE
> 120/208 VAC. 60HZ. 3.95KW. 3 WIRE
>
> Current wires coming out of the oven are 3 at 12 AWG black, red, green, and a
> 16 AWG white. I am not sure if they are original to the oven or not.
> I couldn't find the manual online. I acquired this oven used.
Red and Black wires should go to each side of 240 VAC, White should go
to Neutral or Common, and Green should go to the metal frame. But you
need to verify how the wires are connected inside the oven, or you could
have a serious problem.
Your oven would draw 21.7 Amperes for 5200 Watts. A dual 25 Amp breaker
should be OK unless there is a 120 VAC outlet. In that case, I'd go for
a bigger breaker.
I'm not familiar with the codes that specify required wire size. 12 AWG
might be OK for 30 Amps, but I would prefer 10 AWG.
Fred
Brent
Sep 20, 2016, 3:14:06 PM9/20/16
to
replying to Brent, Brent wrote:
here are the from the spec sheet I was able to locate
Electrical Requirements
120/240 VAC, 60 Hz, 5.2 Kw, 3-wire, 40 Amp
120/208 VAC, 60 Hz, 3.95 Kw, 3-wire, 40 Amp
Oven Wattage @ 240V
Bake 2,000
Broil, Insta-BroilTM 3,000
here are the from the spec sheet I was able to locate
Electrical Requirements
120/240 VAC, 60 Hz, 5.2 Kw, 3-wire, 40 Amp
120/208 VAC, 60 Hz, 3.95 Kw, 3-wire, 40 Amp
Oven Wattage @ 240V
Bake 2,000
Broil, Insta-BroilTM 3,000
Brent
Sep 20, 2016, 3:14:06 PM9/20/16
to
replying to Brent, Brent wrote:
I did just finally find an Amana document with my model number that adds 40amp
to the end of the electrical lines of text on model plate. So would that mean
I need a 40A breaker and 10 gauge wire?
In the manual it says:
"Line Voltage Requirements Line voltage must not exceed rated voltage. Line
voltage less than rated voltage will result in slow heating. Wiring system
must conform to U.L. Standards and National Electrical Code. Installation must
conform to all local, municipal and state building codes, and local utility
regulations. Oven must be connected only to a supplied circuit as specified on
rating plate. This oven requires 3 wires, 115/230-120/240 volts, 60 Hertz A.C.
Unit is equipped with a No. 10 ground wire in conduit. Oven should be fused
separately from other appliances. Verify electric power is off from fuse box
to junction box until oven is installed and ready to operate."
Maybe I need to open it up where the flex conduit enters the oven and see what
else I can find...
Doug Miller
Sep 20, 2016, 6:03:35 PM9/20/16
to
Fred McKenzie <fm...@aol.com> wrote in news:fmmck-E06FF5....@46.sub-
75-242-165.myvzw.com:
> I'm not familiar with the codes that specify required wire size.
Then you probably shouldn't be trying to offer wiring advice.
75-242-165.myvzw.com:
> I'm not familiar with the codes that specify required wire size.
Tony944
Sep 20, 2016, 6:14:06 PM9/20/16
to
replying to Brent, Tony944 wrote:
As you stated your oven have two settings one is for bake and other to Broil.
I am sure you can use one or the other but "NOT" both at the same time!
At the broil rough estimate of current would be 13-14 Amps.
On the bake again rough estimate current will be 9-10 Amps.
This is base on 220 power source, number 12 wire would be sufficient enough.
Likewise the breaker 20-25 Amps ok. Two poles!!
Your white wire is for lights and possible outlet if it has one…
As you stated your oven have two settings one is for bake and other to Broil.
I am sure you can use one or the other but "NOT" both at the same time!
At the broil rough estimate of current would be 13-14 Amps.
On the bake again rough estimate current will be 9-10 Amps.
This is base on 220 power source, number 12 wire would be sufficient enough.
Likewise the breaker 20-25 Amps ok. Two poles!!
Your white wire is for lights and possible outlet if it has one…
trader_4
Sep 20, 2016, 7:22:57 PM9/20/16
to
On Tuesday, September 20, 2016 at 3:14:06 PM UTC-4, Brent wrote:
> replying to Brent, Brent wrote:
> I did just finally find an Amana document with my model number that adds 40amp
> to the end of the electrical lines of text on model plate. So would that mean
> I need a 40A breaker and 10 gauge wire?
We don't know because we can't see what you're reading, don't know
> replying to Brent, Brent wrote:
> I did just finally find an Amana document with my model number that adds 40amp
> to the end of the electrical lines of text on model plate. So would that mean
> I need a 40A breaker and 10 gauge wire?
how you're interpreting it, don't know what exactly is on the eqpt
plate, in the manual, etc. But if it needs 40A, then you need 8g wire.
How you get to 40A, IDK, because all I see is 22A at 240V = 5200 watts
But a typical oven could by 40A.
James Wilkinson
Sep 20, 2016, 7:29:10 PM9/20/16
to
--
Can you grow birds by planting birdseed?
trader_4
Sep 20, 2016, 7:29:26 PM9/20/16
to
On Tuesday, September 20, 2016 at 6:14:06 PM UTC-4, Tony944 wrote:
> replying to Brent, Tony944 wrote:
> As you stated your oven have two settings one is for bake and other to Broil.
> I am sure you can use one or the other but "NOT" both at the same time!
> At the broil rough estimate of current would be 13-14 Amps.
> On the bake again rough estimate current will be 9-10 Amps.
Very odd then that it says 5200W at 240V. It would also be odd
> replying to Brent, Tony944 wrote:
> As you stated your oven have two settings one is for bake and other to Broil.
> I am sure you can use one or the other but "NOT" both at the same time!
> At the broil rough estimate of current would be 13-14 Amps.
> On the bake again rough estimate current will be 9-10 Amps.
for a new oven to use just 14 amps. They don't typically wire them up
with 40A circuits for nothing. It would take a very long time to
wait for your dinner. Do you like to wait?
> This is base on 220 power source, number 12 wire would be sufficient enough.
in the USA, but AFAIK, it's not common. Apparently Amana thinks so too,
they spec the oven at 240V.
James Wilkinson
Sep 20, 2016, 7:30:17 PM9/20/16
to
On Tue, 20 Sep 2016 17:14:01 +0100, Brent <caedfaa9ed1216d60ef...@example.com> wrote:
> What size breaker and wire do I need to use for a new installation (not new
> oven) of a 5200W wall oven.
>
> 2 lines of text for electrical.
> 120/240 VAC. 60HZ. 5.2KW. 3 WIRE
> 120/208 VAC. 60HZ. 3.95KW. 3 WIRE
>
> Current wires coming out of the oven are 3 at 12 AWG black, red, green, and a
> 16 AWG white. I am not sure if they are original to the oven or not.
> I couldn't find the manual online. I acquired this oven used.
What a farce. In the UK, ovens (and everything else) only takes 240 volts. No messing about with extra wires and dual breakers.
> What size breaker and wire do I need to use for a new installation (not new
> oven) of a 5200W wall oven.
>
> 2 lines of text for electrical.
> 120/240 VAC. 60HZ. 5.2KW. 3 WIRE
> 120/208 VAC. 60HZ. 3.95KW. 3 WIRE
>
> Current wires coming out of the oven are 3 at 12 AWG black, red, green, and a
> 16 AWG white. I am not sure if they are original to the oven or not.
> I couldn't find the manual online. I acquired this oven used.
--
ADULT: A person who has stopped growing at both ends and is now growing in the middle.
Diesel
Sep 20, 2016, 9:38:15 PM9/20/16
to
trader_4 <tra...@optonline.net>
news:0c4cf89f-1dba-4ed7...@googlegroups.com Tue, 20
How long have you been an electrician? Just curious, mind you.
--
MID: <nb7u27$crn$1...@boaterdave.dont-email.me>
Hmmm. I most certainly don't understand how I can access a copy of a
zip file but then not be able to unzip it so I can watch it. That
seems VERY clever!
http://al.howardknight.net/msgid.cgi?ID=145716711400
news:0c4cf89f-1dba-4ed7...@googlegroups.com Tue, 20
Sep 2016 23:29:11 GMT in alt.home.repair, wrote:
> I've never seen a 220V power source, only 240V. Maybe it exists
> somewhere in the USA, but AFAIK, it's not common. Apparently Amana
> thinks so too, they spec the oven at 240V.
http://preview.tinyurl.com/59bf3j
> I've never seen a 220V power source, only 240V. Maybe it exists
> somewhere in the USA, but AFAIK, it's not common. Apparently Amana
> thinks so too, they spec the oven at 240V.
How long have you been an electrician? Just curious, mind you.
--
MID: <nb7u27$crn$1...@boaterdave.dont-email.me>
Hmmm. I most certainly don't understand how I can access a copy of a
zip file but then not be able to unzip it so I can watch it. That
seems VERY clever!
http://al.howardknight.net/msgid.cgi?ID=145716711400
gfre...@aol.com
Sep 21, 2016, 2:05:38 AM9/21/16
to
On Tue, 20 Sep 2016 16:29:11 -0700 (PDT), trader_4
<tra...@optonline.net> wrote:
>Very odd then that it says 5200W at 240V. It would also be odd
>for a new oven to use just 14 amps. They don't typically wire them up
>with 40A circuits for nothing. It would take a very long time to
>wait for your dinner. Do you like to wait?
I just bought a wall oven and the ones I looked at were listed for a
<tra...@optonline.net> wrote:
>Very odd then that it says 5200W at 240V. It would also be odd
>for a new oven to use just 14 amps. They don't typically wire them up
>with 40A circuits for nothing. It would take a very long time to
>wait for your dinner. Do you like to wait?
20a circuit. I ended up with a GE 27" convection oven that spec's out
at 3.4kw.
I think you will find the 40a circuits are for ranges tho. Wall ovens
and cooktops are 20a or 30a.
trader_4
Sep 21, 2016, 7:53:17 PM9/21/16
to
On Tuesday, September 20, 2016 at 9:38:15 PM UTC-4, Diesel wrote:
> trader_4 <tra...@optonline.net>
> news:0c4cf89f-1dba-4ed7...@googlegroups.com Tue, 20
> Sep 2016 23:29:11 GMT in alt.home.repair, wrote:
>
> > I've never seen a 220V power source, only 240V. Maybe it exists
> > somewhere in the USA, but AFAIK, it's not common. Apparently Amana
> > thinks so too, they spec the oven at 240V.
>
> http://preview.tinyurl.com/59bf3j
What exactly is that ridiculous link supposed to prove? It starts off with:
> trader_4 <tra...@optonline.net>
> news:0c4cf89f-1dba-4ed7...@googlegroups.com Tue, 20
> Sep 2016 23:29:11 GMT in alt.home.repair, wrote:
>
> > I've never seen a 220V power source, only 240V. Maybe it exists
> > somewhere in the USA, but AFAIK, it's not common. Apparently Amana
> > thinks so too, they spec the oven at 240V.
>
> http://preview.tinyurl.com/59bf3j
Dear Cecil:
"How come the U.S. is practically the only country in the world where household electricity is 110 volts instead of 220 volts?"
Obviously they are very confused because the common residential voltages
here are 120/240, not 110. Again, 110/220 may exist somewhere in the US
today, but I've never seen it. Have you? Where?
trader_4
Sep 21, 2016, 8:47:40 PM9/21/16
to
Jenn-Air combo oven and microwave wall unit. I recently replaced it
with a Kitchenaid double 30" unit. Both of those were 40A, which
was fortunate so I didn't have to rewire. I can see a single oven
would use less, IDK what the OP has, but he is saying that in the
manual it says a 40A circuit, while those other numbers he posted
would seem to show 22A, so IDK.
Tony944
Sep 22, 2016, 12:14:04 AM9/22/16
to
replying to trader_4, Tony944 wrote:
Well I am not surprise that you never seen 220, however there are many places
that power is must likely to be around 208 instead of 240 or 220. in most
metropolitan area you are lucky to have even 208 I have been in places with
power was low as 195 and customer complain why equipment is not working right
"surprise".
Well I am not surprise that you never seen 220, however there are many places
that power is must likely to be around 208 instead of 240 or 220. in most
metropolitan area you are lucky to have even 208 I have been in places with
power was low as 195 and customer complain why equipment is not working right
"surprise".
gfre...@aol.com
Sep 22, 2016, 2:02:32 AM9/22/16
to
On Thu, 22 Sep 2016 04:14:01 +0000, Tony944
<caedfaa9ed1216d60e...@example.com> wrote:
>Well I am not surprise that you never seen 220, however there are many places
>that power is must likely to be around 208 instead of 240 or 220. in most
>metropolitan area you are lucky to have even 208 I have been in places with
>power was low as 195 and customer complain why equipment is not working right
>"surprise".
"In metropolitan areas" (apartments etc) you may actually be looking
<caedfaa9ed1216d60e...@example.com> wrote:
>Well I am not surprise that you never seen 220, however there are many places
>that power is must likely to be around 208 instead of 240 or 220. in most
>metropolitan area you are lucky to have even 208 I have been in places with
>power was low as 195 and customer complain why equipment is not working right
>"surprise".
at 2 legs of a 120/208 3p service
If you have less than 216v (240 minus 10%) at your meter on a 120/240
1p service you should be calling the Public Utilities Commission or
whomever regulates your PoCo. (if the power company will not do
anything about it when you tell them)
Diesel
Sep 22, 2016, 5:45:02 AM9/22/16
to
trader_4 <tra...@optonline.net>
news:438ffb43-8294-4e7a...@googlegroups.com Wed, 21
Long before my time on this planet, though. You shouldn't take
everything I write so personally...
news:438ffb43-8294-4e7a...@googlegroups.com Wed, 21
Sep 2016 23:53:14 GMT in alt.home.repair, wrote:
> On Tuesday, September 20, 2016 at 9:38:15 PM UTC-4, Diesel wrote:
>> trader_4 <tra...@optonline.net>
>> news:0c4cf89f-1dba-4ed7...@googlegroups.com Tue,
>> 20 Sep 2016 23:29:11 GMT in alt.home.repair, wrote:
>>
>> > I've never seen a 220V power source, only 240V. Maybe it
>> > exists somewhere in the USA, but AFAIK, it's not common.
>> > Apparently Amana thinks so too, they spec the oven at 240V.
>>
>> http://preview.tinyurl.com/59bf3j
>
>
> What exactly is that ridiculous link supposed to prove? It starts
> off with:
It doesn't prove anything. Only that 120volt wasn't always the norm.
> On Tuesday, September 20, 2016 at 9:38:15 PM UTC-4, Diesel wrote:
>> trader_4 <tra...@optonline.net>
>> news:0c4cf89f-1dba-4ed7...@googlegroups.com Tue,
>> 20 Sep 2016 23:29:11 GMT in alt.home.repair, wrote:
>>
>> > I've never seen a 220V power source, only 240V. Maybe it
>> > exists somewhere in the USA, but AFAIK, it's not common.
>> > Apparently Amana thinks so too, they spec the oven at 240V.
>>
>> http://preview.tinyurl.com/59bf3j
>
>
> What exactly is that ridiculous link supposed to prove? It starts
> off with:
Long before my time on this planet, though. You shouldn't take
everything I write so personally...
Ralph Mowery
Sep 22, 2016, 10:20:37 AM9/22/16
to
In article <XnsA68B3C31...@dieselpower.eternal-september.org>,
m...@privacy.net says...
220 volts. My dad repaired appliances during that era and often said
110 and 220. If I don't watch it,I will say the same thing even though
most household items are listed as 120 and 240 volts. At one time near
the middle 1950's items were rated for 115 volts. The 'standard' home
voltage seems to have gone from 110 to 115 to 120 volts over the last 70
years.
The 208 voltage is from the way single phase power is taken from a 3
phase circuit. I am not sure what those voltages have done over the
years. I worked as an electrician for a large company and seldom worked
on anything that operated on 208 volts. Only had one or two electrical
panels with that and 120 volts in it. Everything else was 120/240 volt
rated for the office areas. Most of the work I did was with the 480
volt 3 phase circuits or the 277 volts you get off that for the lights.
At one time you had to specify if you wanted the 220/240 volt operation
or the 208 lower voltage. Probably depends on what area of the country
you are in.
m...@privacy.net says...
>
> trader_4 <tra...@optonline.net>
> news:438ffb43-8294-4e7a...@googlegroups.com Wed, 21
> Sep 2016 23:53:14 GMT in alt.home.repair, wrote:
>
> > On Tuesday, September 20, 2016 at 9:38:15 PM UTC-4, Diesel wrote:
> >> trader_4 <tra...@optonline.net>
> >> news:0c4cf89f-1dba-4ed7...@googlegroups.com Tue,
> >> 20 Sep 2016 23:29:11 GMT in alt.home.repair, wrote:
> >>
> >> > I've never seen a 220V power source, only 240V. Maybe it
> >> > exists somewhere in the USA, but AFAIK, it's not common.
> >> > Apparently Amana thinks so too, they spec the oven at 240V.
> >>
> >> http://preview.tinyurl.com/59bf3j
> >
> >
> > What exactly is that ridiculous link supposed to prove? It starts
> > off with:
>
> It doesn't prove anything. Only that 120volt wasn't always the norm.
> Long before my time on this planet, though. You shouldn't take
> everything I write so personally...
>
Years ago , around 1950 , many items were listed as operating on 110 or
> trader_4 <tra...@optonline.net>
> news:438ffb43-8294-4e7a...@googlegroups.com Wed, 21
> Sep 2016 23:53:14 GMT in alt.home.repair, wrote:
>
> > On Tuesday, September 20, 2016 at 9:38:15 PM UTC-4, Diesel wrote:
> >> trader_4 <tra...@optonline.net>
> >> news:0c4cf89f-1dba-4ed7...@googlegroups.com Tue,
> >> 20 Sep 2016 23:29:11 GMT in alt.home.repair, wrote:
> >>
> >> > I've never seen a 220V power source, only 240V. Maybe it
> >> > exists somewhere in the USA, but AFAIK, it's not common.
> >> > Apparently Amana thinks so too, they spec the oven at 240V.
> >>
> >> http://preview.tinyurl.com/59bf3j
> >
> >
> > What exactly is that ridiculous link supposed to prove? It starts
> > off with:
>
> It doesn't prove anything. Only that 120volt wasn't always the norm.
> Long before my time on this planet, though. You shouldn't take
> everything I write so personally...
>
220 volts. My dad repaired appliances during that era and often said
110 and 220. If I don't watch it,I will say the same thing even though
most household items are listed as 120 and 240 volts. At one time near
the middle 1950's items were rated for 115 volts. The 'standard' home
voltage seems to have gone from 110 to 115 to 120 volts over the last 70
years.
The 208 voltage is from the way single phase power is taken from a 3
phase circuit. I am not sure what those voltages have done over the
years. I worked as an electrician for a large company and seldom worked
on anything that operated on 208 volts. Only had one or two electrical
panels with that and 120 volts in it. Everything else was 120/240 volt
rated for the office areas. Most of the work I did was with the 480
volt 3 phase circuits or the 277 volts you get off that for the lights.
At one time you had to specify if you wanted the 220/240 volt operation
or the 208 lower voltage. Probably depends on what area of the country
you are in.
trader_4
Sep 22, 2016, 10:37:07 AM9/22/16
to
On Thursday, September 22, 2016 at 5:45:02 AM UTC-4, Diesel wrote:
> trader_4 <tra...@optonline.net>
> news:438ffb43-8294-4e7a...@googlegroups.com Wed, 21
> Sep 2016 23:53:14 GMT in alt.home.repair, wrote:
>
> > On Tuesday, September 20, 2016 at 9:38:15 PM UTC-4, Diesel wrote:
> >> trader_4 <tra...@optonline.net>
> >> news:0c4cf89f-1dba-4ed7...@googlegroups.com Tue,
> >> 20 Sep 2016 23:29:11 GMT in alt.home.repair, wrote:
> >>
> >> > I've never seen a 220V power source, only 240V. Maybe it
> >> > exists somewhere in the USA, but AFAIK, it's not common.
> >> > Apparently Amana thinks so too, they spec the oven at 240V.
> >>
> >> http://preview.tinyurl.com/59bf3j
> >
> >
> > What exactly is that ridiculous link supposed to prove? It starts
> > off with:
>
> It doesn't prove anything. Only that 120volt wasn't always the norm.
Who said it was? We aren't talking about history here, only what's in
> trader_4 <tra...@optonline.net>
> news:438ffb43-8294-4e7a...@googlegroups.com Wed, 21
> Sep 2016 23:53:14 GMT in alt.home.repair, wrote:
>
> > On Tuesday, September 20, 2016 at 9:38:15 PM UTC-4, Diesel wrote:
> >> trader_4 <tra...@optonline.net>
> >> news:0c4cf89f-1dba-4ed7...@googlegroups.com Tue,
> >> 20 Sep 2016 23:29:11 GMT in alt.home.repair, wrote:
> >>
> >> > I've never seen a 220V power source, only 240V. Maybe it
> >> > exists somewhere in the USA, but AFAIK, it's not common.
> >> > Apparently Amana thinks so too, they spec the oven at 240V.
> >>
> >> http://preview.tinyurl.com/59bf3j
> >
> >
> > What exactly is that ridiculous link supposed to prove? It starts
> > off with:
>
> It doesn't prove anything. Only that 120volt wasn't always the norm.
use today with the OP's oven.
> Long before my time on this planet, though. You shouldn't take
> everything I write so personally...
>
today in the USA, throw that into the mix of this oven, etc. Nothing
personal, just that I think facts matter.
FromTheRafters
Sep 22, 2016, 11:04:10 AM9/22/16
to
Ralph Mowery laid this down on his screen :
https://en.wikipedia.org/wiki/Mains_electricity#Standardisation
"Historically 110 V, 115 V and 117 V have been used at different times
and places in North America. Mains power is sometimes spoken of as 110
V; however, 120 V is the nominal voltage."
> The 208 voltage is from the way single phase power is taken from a 3
> phase circuit. I am not sure what those voltages have done over the
> years. I worked as an electrician for a large company and seldom worked
> on anything that operated on 208 volts. Only had one or two electrical
> panels with that and 120 volts in it. Everything else was 120/240 volt
> rated for the office areas. Most of the work I did was with the 480
> volt 3 phase circuits or the 277 volts you get off that for the lights.
The 208V figure comes from the voltage between two legs of the three
phase supply. Usually, the entire three phases are used for the three
phase applications or one of the legs to neutral (120V) is used for
single phase applications.
"Historically 110 V, 115 V and 117 V have been used at different times
and places in North America. Mains power is sometimes spoken of as 110
V; however, 120 V is the nominal voltage."
> The 208 voltage is from the way single phase power is taken from a 3
> phase circuit. I am not sure what those voltages have done over the
> years. I worked as an electrician for a large company and seldom worked
> on anything that operated on 208 volts. Only had one or two electrical
> panels with that and 120 volts in it. Everything else was 120/240 volt
> rated for the office areas. Most of the work I did was with the 480
> volt 3 phase circuits or the 277 volts you get off that for the lights.
phase supply. Usually, the entire three phases are used for the three
phase applications or one of the legs to neutral (120V) is used for
single phase applications.
TimR
Sep 22, 2016, 3:33:27 PM9/22/16
to
You can call it 110 or 120 interchangeably.
It hasn't actually varied in my lifetime, other than the normal day to day variation with load.
That's an RMS value, the peak is around 170.
Similarly when I worked in a factory the voltage was 440, 460, or 480, depending on who was talking, but it was all the same jolts.
It hasn't actually varied in my lifetime, other than the normal day to day variation with load.
That's an RMS value, the peak is around 170.
Similarly when I worked in a factory the voltage was 440, 460, or 480, depending on who was talking, but it was all the same jolts.
FromTheRafters
Sep 22, 2016, 4:50:44 PM9/22/16
to
TimR expressed precisely :
> It hasn't actually varied in my lifetime, other than the normal day to day
> variation with load.
No "brownouts" then? Of course, we're not really talking about actual
voltages here, but the nomenclature instead.
> That's an RMS value, the peak is around 170.
Yes, but it is best to stick to one measure throughout a discussion.
> Similarly when I worked in a factory the voltage was 440, 460, or 480,
> depending on who was talking, but it was all the same jolts.
As long as everyone understands each other, then there is no harm. When
using figures like that in engineering, everyone should use the
'correct' voltage in their computations.
> You can call it 110 or 120 interchangeably.
Yes, but one of those would be wrong.
> It hasn't actually varied in my lifetime, other than the normal day to day
> variation with load.
voltages here, but the nomenclature instead.
> That's an RMS value, the peak is around 170.
> Similarly when I worked in a factory the voltage was 440, 460, or 480,
> depending on who was talking, but it was all the same jolts.
using figures like that in engineering, everyone should use the
'correct' voltage in their computations.
dpb
Sep 22, 2016, 5:59:50 PM9/22/16
to
On 09/22/2016 10:04 AM, FromTheRafters wrote:
> Ralph Mowery laid this down on his screen :
>> In article <XnsA68B3C31...@dieselpower.eternal-september.org>,
>> m...@privacy.net says...
> Ralph Mowery laid this down on his screen :
>> In article <XnsA68B3C31...@dieselpower.eternal-september.org>,
>> m...@privacy.net says...
...
>> Years ago , around 1950 , many items were listed as operating on 110
>> or 220 volts. My dad repaired appliances during that era and often
>> said 110 and 220. If I don't watch it,I will say the same thing even
>> though most household items are listed as 120 and 240 volts. At one
>> time near the middle 1950's items were rated for 115 volts. The
>> 'standard' home voltage seems to have gone from 110 to 115 to 120
>> volts over the last 70 years.
>
> https://en.wikipedia.org/wiki/Mains_electricity#Standardisation
>
> "Historically 110 V, 115 V and 117 V have been used at different times
> and places in North America. Mains power is sometimes spoken of as 110
> V; however, 120 V is the nominal voltage."
>
...
>> Years ago , around 1950 , many items were listed as operating on 110
>> or 220 volts. My dad repaired appliances during that era and often
>> said 110 and 220. If I don't watch it,I will say the same thing even
>> though most household items are listed as 120 and 240 volts. At one
>> time near the middle 1950's items were rated for 115 volts. The
>> 'standard' home voltage seems to have gone from 110 to 115 to 120
>> volts over the last 70 years.
>
> https://en.wikipedia.org/wiki/Mains_electricity#Standardisation
>
> "Historically 110 V, 115 V and 117 V have been used at different times
> and places in North America. Mains power is sometimes spoken of as 110
> V; however, 120 V is the nominal voltage."
>
US spec's are given in ANSI C84.1-2011; you may be surprised to lean
that first standardized effort by AIEE occurred as far back as 1898 the
first joint meetings were held with the first accepted for publication
in June, 1899. Revisions to it occurred in 1902, 1905 and 1911. The AC
low voltage ratings at that time were established as 110,220,440 and 550 V.
I don't have the full history between then and the initial C84.1
adoption in (I believe) 1956 but as the Wikipedia article notes, there
were intermediary periods of voltages between 110 and the current 120.
Some history-type papers I've seen had data that by the late 1940s
something like 90% of produced light bulbs were rated for 120V.
A link to the C84.1 Table 1
--<http://www.powerqualityworld.com/2011/04/ansi-c84-1-voltage-ratings-60-hertz.html>
trader_4
Sep 22, 2016, 6:03:01 PM9/22/16
to
industry operates and it just adds to the confusion. AFAIK, they
have a voltage spec that they try to deliver and in all the places
I've been around the USA, that's 120V, not 110. Apparently Ammana,
the manufacturer of the oven in question agrees, because you'll see
that they spec it at 240V, not 220V. Which is why I asked where
anyone has seen 110V today as the norm in the USA?
trader_4
Sep 22, 2016, 6:07:03 PM9/22/16
to
On Thursday, September 22, 2016 at 4:50:44 PM UTC-4, FromTheRafters wrote:
> TimR expressed precisely :
> > You can call it 110 or 120 interchangeably.
>
> Yes, but one of those would be wrong.
>
> > It hasn't actually varied in my lifetime, other than the normal day to day
> > variation with load.
>
> No "brownouts" then? Of course, we're not really talking about actual
> voltages here, but the nomenclature instead.
>
Or how about it hasn't varied from what? 110? or 120? Here it's
> TimR expressed precisely :
> > You can call it 110 or 120 interchangeably.
>
> Yes, but one of those would be wrong.
>
> > It hasn't actually varied in my lifetime, other than the normal day to day
> > variation with load.
>
> No "brownouts" then? Of course, we're not really talking about actual
> voltages here, but the nomenclature instead.
>
120V at the panel, with minor variation.
Ed Pawlowski
Sep 22, 2016, 7:05:18 PM9/22/16
to
On 9/22/2016 6:02 PM, trader_4 wrote:
> People can call it whatever they want, but that isn't how the power
> industry operates and it just adds to the confusion. AFAIK, they
> have a voltage spec that they try to deliver and in all the places
> I've been around the USA, that's 120V, not 110. Apparently Ammana,
> the manufacturer of the oven in question agrees, because you'll see
> that they spec it at 240V, not 220V. Which is why I asked where
> anyone has seen 110V today as the norm in the USA?
>
Recently? I recall 110V at our house in Philadelphia, but that was 60
> People can call it whatever they want, but that isn't how the power
> industry operates and it just adds to the confusion. AFAIK, they
> have a voltage spec that they try to deliver and in all the places
> I've been around the USA, that's 120V, not 110. Apparently Ammana,
> the manufacturer of the oven in question agrees, because you'll see
> that they spec it at 240V, not 220V. Which is why I asked where
> anyone has seen 110V today as the norm in the USA?
>
years ago. Going back to Westinghouse and his AC transformers I did
read they were 110V output. With voltage drops at distances it could be
low and thus, was boosted to a nominal 120V.
I am neither an electrical historian or engineer and I'm not going to
search for cites. Nominal voltage today is 120 but can be lower with
distance.
trader_4
Sep 22, 2016, 7:58:16 PM9/22/16
to
supplies today for the OP's oven and similar. Which again is why I
asked if anyone has seen 110V in the USA and that's today, not in 1942.
In my world it's 120/240V. And it does make a difference. If I saw
110V at my panel, I'd know something isn't right.
trader_4
Sep 22, 2016, 8:02:42 PM9/22/16
to
On Thursday, September 22, 2016 at 7:05:18 PM UTC-4, Ed Pawlowski wrote:
the people who are talking about 110/220, would we measure close
to that or would we really see 120/240? I'm guessing the latter.
FromTheRafters
Sep 22, 2016, 8:12:47 PM9/22/16
to
dpb presented the following explanation :
instructor back in 1970. It had a clear plastic strap around it with
110VAC in black stamped on it. He told me it was about twenty years old
because back in 1950 or so 110 volts was the norm.
> I don't have the full history between then and the initial C84.1 adoption in
> (I believe) 1956 but as the Wikipedia article notes, there were intermediary
> periods of voltages between 110 and the current 120. Some history-type papers
> I've seen had data that by the late 1940s something like 90% of produced
> light bulbs were rated for 120V.
That sounds about right.
> On 09/22/2016 10:04 AM, FromTheRafters wrote:
>> Ralph Mowery laid this down on his screen :
>>> In article <XnsA68B3C31...@dieselpower.eternal-september.org>,
>>> m...@privacy.net says...
> ...
>
>>> Years ago , around 1950 , many items were listed as operating on 110
>>> or 220 volts. My dad repaired appliances during that era and often
>>> said 110 and 220. If I don't watch it,I will say the same thing even
>>> though most household items are listed as 120 and 240 volts. At one
>>> time near the middle 1950's items were rated for 115 volts. The
>>> 'standard' home voltage seems to have gone from 110 to 115 to 120
>>> volts over the last 70 years.
>>
>> https://en.wikipedia.org/wiki/Mains_electricity#Standardisation
>>
>> "Historically 110 V, 115 V and 117 V have been used at different times
>> and places in North America. Mains power is sometimes spoken of as 110
>> V; however, 120 V is the nominal voltage."
>>
> ...
>
> US spec's are given in ANSI C84.1-2011; you may be surprised to lean that
> first standardized effort by AIEE occurred as far back as 1898 the first
> joint meetings were held with the first accepted for publication in June,
> 1899. Revisions to it occurred in 1902, 1905 and 1911. The AC low voltage
> ratings at that time were established as 110,220,440 and 550 V.
I showed an old phonograph motor to my Electricity & Electronics
>> Ralph Mowery laid this down on his screen :
>>> In article <XnsA68B3C31...@dieselpower.eternal-september.org>,
>>> m...@privacy.net says...
> ...
>
>>> Years ago , around 1950 , many items were listed as operating on 110
>>> or 220 volts. My dad repaired appliances during that era and often
>>> said 110 and 220. If I don't watch it,I will say the same thing even
>>> though most household items are listed as 120 and 240 volts. At one
>>> time near the middle 1950's items were rated for 115 volts. The
>>> 'standard' home voltage seems to have gone from 110 to 115 to 120
>>> volts over the last 70 years.
>>
>> https://en.wikipedia.org/wiki/Mains_electricity#Standardisation
>>
>> "Historically 110 V, 115 V and 117 V have been used at different times
>> and places in North America. Mains power is sometimes spoken of as 110
>> V; however, 120 V is the nominal voltage."
>>
> ...
>
> US spec's are given in ANSI C84.1-2011; you may be surprised to lean that
> first standardized effort by AIEE occurred as far back as 1898 the first
> joint meetings were held with the first accepted for publication in June,
> 1899. Revisions to it occurred in 1902, 1905 and 1911. The AC low voltage
> ratings at that time were established as 110,220,440 and 550 V.
instructor back in 1970. It had a clear plastic strap around it with
110VAC in black stamped on it. He told me it was about twenty years old
because back in 1950 or so 110 volts was the norm.
> I don't have the full history between then and the initial C84.1 adoption in
> (I believe) 1956 but as the Wikipedia article notes, there were intermediary
> periods of voltages between 110 and the current 120. Some history-type papers
> I've seen had data that by the late 1940s something like 90% of produced
> light bulbs were rated for 120V.
Ed Pawlowski
Sep 22, 2016, 8:21:14 PM9/22/16
to
volt or two. I've seen 135 at my house but after reporting it, power
company corrected it.
gfre...@aol.com
Sep 22, 2016, 8:45:31 PM9/22/16
to
On Thu, 22 Sep 2016 17:02:38 -0700 (PDT), trader_4
<tra...@optonline.net> wrote:
>Or to put it another way, if we went to the panel in the homes of
>the people who are talking about 110/220, would we measure close
>to that or would we really see 120/240? I'm guessing the latter.
If you came to my house it would be 123.5 - 123.9
<tra...@optonline.net> wrote:
>Or to put it another way, if we went to the panel in the homes of
>the people who are talking about 110/220, would we measure close
>to that or would we really see 120/240? I'm guessing the latter.
Diesel
Sep 22, 2016, 8:56:34 PM9/22/16
to
trader_4 <tra...@optonline.net>
news:c6a9362d-4661-4609...@googlegroups.com Thu, 22
news:c6a9362d-4661-4609...@googlegroups.com Thu, 22
Sep 2016 14:37:00 GMT in alt.home.repair, wrote:
> I guess you think it's better to let people imply that 220V is a
> standard today in the USA, throw that into the mix of this oven,
> etc. Nothing personal, just that I think facts matter.
You shouldn't make broad assumptions like that.
> I guess you think it's better to let people imply that 220V is a
> standard today in the USA, throw that into the mix of this oven,
> etc. Nothing personal, just that I think facts matter.
Ralph Mowery
Sep 22, 2016, 11:14:28 PM9/22/16
to
In article <4d7a6c35-be43-4ff7...@googlegroups.com>,
tra...@optonline.net says...
This discussion is almost like trying to call a 2x4 whatever it is now.
Over the years the 2x4 has gotten smaller as the time passes by. The
voltage has gotten higher. If you were to go to a lumber yard would you
ask for a 2x4 or maybe something like a 1 3/4 x 3 1/2 or whatever they
are now ?
I have a voltmeter on one of the outlets at my house that stays on all
the time. It has been calibrated with instruments that were at one time
set to the NIST. It has ranged from a low of 118 to a high of 124 at
the times I have seen it. Most of the time it is around 121 to 123
volts.
tra...@optonline.net says...
Over the years the 2x4 has gotten smaller as the time passes by. The
voltage has gotten higher. If you were to go to a lumber yard would you
ask for a 2x4 or maybe something like a 1 3/4 x 3 1/2 or whatever they
are now ?
I have a voltmeter on one of the outlets at my house that stays on all
the time. It has been calibrated with instruments that were at one time
set to the NIST. It has ranged from a low of 118 to a high of 124 at
the times I have seen it. Most of the time it is around 121 to 123
volts.
trader_4
Sep 23, 2016, 2:02:04 PM9/23/16
to
On Thursday, September 22, 2016 at 11:14:28 PM UTC-4, Ralph Mowery wrote:
> In article <4d7a6c35-be43-4ff7...@googlegroups.com>,
> tra...@optonline.net says...
> >
> > On Thursday, September 22, 2016 at 7:05:18 PM UTC-4, Ed Pawlowski wrote:
> > > On 9/22/2016 6:02 PM, trader_4 wrote:
> > >
> > >
> > > Recently? I recall 110V at our house in Philadelphia, but that was 60
> > > years ago. Going back to Westinghouse and his AC transformers I did
> > > read they were 110V output. With voltage drops at distances it could be
> > > low and thus, was boosted to a nominal 120V.
> > >
> > > I am neither an electrical historian or engineer and I'm not going to
> > > search for cites. Nominal voltage today is 120 but can be lower with
> > > distance.
> >
> > Or to put it another way, if we went to the panel in the homes of
> > the people who are talking about 110/220, would we measure close
> > to that or would we really see 120/240? I'm guessing the latter.
>
> This discussion is almost like trying to call a 2x4 whatever it is now.
> Over the years the 2x4 has gotten smaller as the time passes by. The
> voltage has gotten higher. If you were to go to a lumber yard would you
> ask for a 2x4 or maybe something like a 1 3/4 x 3 1/2 or whatever they
> are now ?
>
Not even close to the same. 2x4's are called out as that in construction
> In article <4d7a6c35-be43-4ff7...@googlegroups.com>,
> tra...@optonline.net says...
> >
> > On Thursday, September 22, 2016 at 7:05:18 PM UTC-4, Ed Pawlowski wrote:
> > > On 9/22/2016 6:02 PM, trader_4 wrote:
> > >
> > >
> > > Recently? I recall 110V at our house in Philadelphia, but that was 60
> > > years ago. Going back to Westinghouse and his AC transformers I did
> > > read they were 110V output. With voltage drops at distances it could be
> > > low and thus, was boosted to a nominal 120V.
> > >
> > > I am neither an electrical historian or engineer and I'm not going to
> > > search for cites. Nominal voltage today is 120 but can be lower with
> > > distance.
> >
> > Or to put it another way, if we went to the panel in the homes of
> > the people who are talking about 110/220, would we measure close
> > to that or would we really see 120/240? I'm guessing the latter.
>
> This discussion is almost like trying to call a 2x4 whatever it is now.
> Over the years the 2x4 has gotten smaller as the time passes by. The
> voltage has gotten higher. If you were to go to a lumber yard would you
> ask for a 2x4 or maybe something like a 1 3/4 x 3 1/2 or whatever they
> are now ?
>
specs, though the actual dimensions are less. That is what they are referred to by standards, by sellers, by buyers, by people in the trade,
who call them 2x4s but deliver the spec'd dimensions. You just saw
the specs for the oven in this thread. It says 240V, not 220. Same with
my oven when I put it in. The applicances one typically buys are spec'd
at 120V, not 110V. And 120V is what the power company delivers, again
to a spec. In other words the industry is using 240/120, mostly
consistently and that is what you get when you measure at the panel,
at least here. So, I don't see the need for the 110/220 confusion,
it's just wrong.
> I have a voltmeter on one of the outlets at my house that stays on all
> the time. It has been calibrated with instruments that were at one time
> set to the NIST. It has ranged from a low of 118 to a high of 124 at
> the times I have seen it. Most of the time it is around 121 to 123
> volts.
trader_4
Sep 23, 2016, 2:03:42 PM9/23/16
to
On Thursday, September 22, 2016 at 8:56:34 PM UTC-4, Diesel wrote:
> trader_4 <tra...@optonline.net>
> news:c6a9362d-4661-4609...@googlegroups.com Thu, 22
> Sep 2016 14:37:00 GMT in alt.home.repair, wrote:
>
> > I guess you think it's better to let people imply that 220V is a
> > standard today in the USA, throw that into the mix of this oven,
> > etc. Nothing personal, just that I think facts matter.
>
> You shouldn't make broad assumptions like that.
>
>
Well what should one assume, when it's a 240V oven being connected
> trader_4 <tra...@optonline.net>
> news:c6a9362d-4661-4609...@googlegroups.com Thu, 22
> Sep 2016 14:37:00 GMT in alt.home.repair, wrote:
>
> > I guess you think it's better to let people imply that 220V is a
> > standard today in the USA, throw that into the mix of this oven,
> > etc. Nothing personal, just that I think facts matter.
>
> You shouldn't make broad assumptions like that.
>
>
to a 240V service and you start talking about 220V? Why confuse
people who don't even know how to hook up their oven, by using
a voltage convention that is wrong and does not exist?
Mark Lloyd
Sep 23, 2016, 3:35:11 PM9/23/16
to
On 09/22/2016 02:33 PM, TimR wrote:
> You can call it 110 or 120 interchangeably.
>
> It hasn't actually varied in my lifetime, other than the normal day to day variation with load.
>
> That's an RMS value, the peak is around 170.
IIRC, converting RMS to peak, you multiply by the square root of 2 (I
> You can call it 110 or 120 interchangeably.
>
> It hasn't actually varied in my lifetime, other than the normal day to day variation with load.
>
> That's an RMS value, the peak is around 170.
don't know why it's THAT). 120 * SQR(2) = 169.7056275, which most people
would call 170. I needed to know that recently when selecting a diode
(1N4003) for making a light half brightness.
>
> Similarly when I worked in a factory the voltage was 440, 460, or 480, depending on who was talking, but it was all the same jolts.
>
submersible well pump that uses 220. I've always said 240 for that.
Also, I have measured the voltage here, and have almost exactly 120 and 240.
BTW, when doing the above math I remember by first class in
trigonometry. Most of the time, the teacher was walking around showing
people what buttons to press on their calculators. Then they would be
asked for something like "the SIN of 80" and some student would read all
8 or more digits of the answer. There was almost nothing said about what
trigonometry IS or what it could be used for.
--
93 days until the winter celebration (Sunday December 25, 2016 12:00:00
AM for 1 day).
Mark Lloyd
http://notstupid.us/
"Most of it is crap, but in every pile of crap is a gem of stupidity
that will have you on the floor in laughter." [psy...@ace.comi
(Preacher)]
Ralph Mowery
Sep 23, 2016, 4:03:28 PM9/23/16
to
In article <LtfFz.1216$z45....@fx39.iad>, n...@mail.invalid says...
was either a slide rule or look them up in the CRC book.
For most electrical/electronic work 3 digits raised to whatever power of
10 was needed was about all that was ever needed. Most of the
components were only 10 % few were 5 % and very few 1 % except for the
test gear.
>
>
>
> BTW, when doing the above math I remember by first class in
> trigonometry. Most of the time, the teacher was walking around showing
> people what buttons to press on their calculators. Then they would be
> asked for something like "the SIN of 80" and some student would read all
> 8 or more digits of the answer. There was almost nothing said about what
> trigonometry IS or what it could be used for.
When I took trig we did not have to worry about the buttons to push. It
>
>
> BTW, when doing the above math I remember by first class in
> trigonometry. Most of the time, the teacher was walking around showing
> people what buttons to press on their calculators. Then they would be
> asked for something like "the SIN of 80" and some student would read all
> 8 or more digits of the answer. There was almost nothing said about what
> trigonometry IS or what it could be used for.
was either a slide rule or look them up in the CRC book.
For most electrical/electronic work 3 digits raised to whatever power of
10 was needed was about all that was ever needed. Most of the
components were only 10 % few were 5 % and very few 1 % except for the
test gear.
dpb
Sep 23, 2016, 5:03:20 PM9/23/16
to
On 09/23/2016 1:01 PM, trader_4 wrote:
...
> ... So, I don't see the need for the 110/220 confusion,
> it's just wrong.
Like many things, it (110V referral, that is) hangs around because at
one time it _was_ the standard and not all the people who grew up with
it died off at the time it was changed and, besides, they had kids and
those kids learned to call it what their folks did, and that continues
to this day...what the actual is isn't really the issue or the cause
either one; it's simply historical precedent.
...
> ... So, I don't see the need for the 110/220 confusion,
> it's just wrong.
Like many things, it (110V referral, that is) hangs around because at
one time it _was_ the standard and not all the people who grew up with
it died off at the time it was changed and, besides, they had kids and
those kids learned to call it what their folks did, and that continues
to this day...what the actual is isn't really the issue or the cause
either one; it's simply historical precedent.
FromTheRafters
Sep 23, 2016, 5:47:18 PM9/23/16
to
Mark Lloyd was thinking very hard :
does it lead to incomplete understanding of it, it hides the usefulness
of it.
When I was in school we weren't allowed to use calculators. One teacher
I had would allow us to use a slide-rule if we knew how to work one.
> On 09/22/2016 02:33 PM, TimR wrote:
>> You can call it 110 or 120 interchangeably.
>>
>> It hasn't actually varied in my lifetime, other than the normal day to day
>> variation with load.
>>
>> That's an RMS value, the peak is around 170.
>
> IIRC, converting RMS to peak, you multiply by the square root of 2 (I don't
> know why it's THAT). 120 * SQR(2) = 169.7056275, which most people would call
> 170. I needed to know that recently when selecting a diode (1N4003) for
> making a light half brightness.
>
>>
>> Similarly when I worked in a factory the voltage was 440, 460, or 480,
>> depending on who was talking, but it was all the same jolts.
>>
>
> I recently was talking to an older friend who was talking about a submersible
> well pump that uses 220. I've always said 240 for that. Also, I have measured
> the voltage here, and have almost exactly 120 and 240.
>
> BTW, when doing the above math I remember by first class in trigonometry.
> Most of the time, the teacher was walking around showing people what buttons
> to press on their calculators. Then they would be asked for something like
> "the SIN of 80" and some student would read all 8 or more digits of the
> answer. There was almost nothing said about what trigonometry IS or what it
> could be used for.
That is a major problem with the way mathematics is taught. Not only
>> You can call it 110 or 120 interchangeably.
>>
>> It hasn't actually varied in my lifetime, other than the normal day to day
>> variation with load.
>>
>> That's an RMS value, the peak is around 170.
>
> IIRC, converting RMS to peak, you multiply by the square root of 2 (I don't
> know why it's THAT). 120 * SQR(2) = 169.7056275, which most people would call
> 170. I needed to know that recently when selecting a diode (1N4003) for
> making a light half brightness.
>
>>
>> Similarly when I worked in a factory the voltage was 440, 460, or 480,
>> depending on who was talking, but it was all the same jolts.
>>
>
> I recently was talking to an older friend who was talking about a submersible
> well pump that uses 220. I've always said 240 for that. Also, I have measured
> the voltage here, and have almost exactly 120 and 240.
>
> BTW, when doing the above math I remember by first class in trigonometry.
> Most of the time, the teacher was walking around showing people what buttons
> to press on their calculators. Then they would be asked for something like
> "the SIN of 80" and some student would read all 8 or more digits of the
> answer. There was almost nothing said about what trigonometry IS or what it
> could be used for.
does it lead to incomplete understanding of it, it hides the usefulness
of it.
When I was in school we weren't allowed to use calculators. One teacher
I had would allow us to use a slide-rule if we knew how to work one.
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