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#1
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convert outlet from 230V to 115V
I purchased a thru-the-wall A/C unit that runs 115V to replace an out
A/C and didn't realized the old ran on 230V. Is there an easy way to convert the 230V outlet to 115V? |
#2
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convert outlet from 230V to 115V
I assume this a US question.
Yes and no. The very fact that you needed to ask sounds like this might be a bit too technical for you. 220 volts does not require a neutral. 110 absolutely must have. Both should have a ground. How many wires and what colors in your receptacle? Let's assume you have red/black/white/green. Use a volt tester and check the voltages: between red and black you should get 220 between red and white you should get 110 between black and white you should get 110 between white and green you should get none. If all this is true, replace the existing receptacle using either blk or red on the brass screw / white on the silver screw / green on the green screw / cap off the unused blk or red (or better, take it off at the breaker). If this is not what you have, hire an electrician. -- ______________________________ Keep the whole world singing . . . . DanG (remove the sevens) wrote in message ps.com... I purchased a thru-the-wall A/C unit that runs 115V to replace an out A/C and didn't realized the old ran on 230V. Is there an easy way to convert the 230V outlet to 115V? |
#4
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convert outlet from 230V to 115V
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#6
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convert outlet from 230V to 115V
On Jun 14, 10:23 pm, mm wrote:
On Thu, 14 Jun 2007 17:29:57 -0700, wrote: I purchased a thru-the-wall A/C unit that runs 115V to replace an out A/C and didn't realized the old ran on 230V. Is there an easy way to convert the 230V outlet to 115V? If I recall correctly, 220v ACs are more efficient than 110. CAn you return the one you have and get one that works on 220/30/40. (Doug, I live in the 110/220 world and don't plan to move until I reach the Next World.) IIRC, if you calculate the actual rms voltage, a "110" or "120" volt line is actually 117v. Of course this is nominal, since it excludes noise and IR drops. So, yer both right. J |
#7
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convert outlet from 230V to 115V
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#8
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convert outlet from 230V to 115V
On Fri, 15 Jun 2007 06:27:59 -0700, wrote:
On Jun 14, 10:23 pm, mm wrote: On Thu, 14 Jun 2007 17:29:57 -0700, wrote: I purchased a thru-the-wall A/C unit that runs 115V to replace an out A/C and didn't realized the old ran on 230V. Is there an easy way to convert the 230V outlet to 115V? If I recall correctly, 220v ACs are more efficient than 110. CAn you return the one you have and get one that works on 220/30/40. (Doug, I live in the 110/220 world and don't plan to move until I reach the Next World.) IIRC, if you calculate the actual rms voltage, a "110" or "120" volt line is actually 117v. Of course this is nominal, since it excludes noise and IR drops. How would you get that? BTW, my outlets usually supply exactly 120V RMS. So, yer both right. J -- Mark Lloyd http://notstupid.laughingsquid.com "So far as I can remember, there is not one word in the Gospels in praise of intelligence." --Bertrand Russell |
#9
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convert outlet from 230V to 115V
According to Mark Lloyd :
On Fri, 15 Jun 2007 06:27:59 -0700, wrote: On Jun 14, 10:23 pm, mm wrote: On Thu, 14 Jun 2007 17:29:57 -0700, wrote: I purchased a thru-the-wall A/C unit that runs 115V to replace an out A/C and didn't realized the old ran on 230V. Is there an easy way to convert the 230V outlet to 115V? If I recall correctly, 220v ACs are more efficient than 110. CAn you return the one you have and get one that works on 220/30/40. (Doug, I live in the 110/220 world and don't plan to move until I reach the Next World.) IIRC, if you calculate the actual rms voltage, a "110" or "120" volt line is actually 117v. Of course this is nominal, since it excludes noise and IR drops. How would you get that? BTW, my outlets usually supply exactly 120V RMS. Unloaded. Power specifications take into account permissible voltage drop under load. The permissible voltage drop includes the +/- 5% tolerance or so permitted at your service panel's 120/240V and the 5% or so voltage drop permitted over the house wiring and supply cords. Which basically means that house power is allowed to be (by code and regulation) anywhere between about 110V and 130V. In other words, some people call it 110V, others call it 120V, and some people pick numbers in between. And of course, most volt meters aren't very good at this accuracy on AC house power either. -- Chris Lewis, Age and Treachery will Triumph over Youth and Skill It's not just anyone who gets a Starship Cruiser class named after them. |
#10
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convert outlet from 230V to 115V
On Mon, 18 Jun 2007 18:57:11 -0000, (Chris
Lewis) wrote: According to Mark Lloyd : On Fri, 15 Jun 2007 06:27:59 -0700, wrote: On Jun 14, 10:23 pm, mm wrote: On Thu, 14 Jun 2007 17:29:57 -0700, wrote: I purchased a thru-the-wall A/C unit that runs 115V to replace an out A/C and didn't realized the old ran on 230V. Is there an easy way to convert the 230V outlet to 115V? If I recall correctly, 220v ACs are more efficient than 110. CAn you return the one you have and get one that works on 220/30/40. (Doug, I live in the 110/220 world and don't plan to move until I reach the Next World.) IIRC, if you calculate the actual rms voltage, a "110" or "120" volt line is actually 117v. Of course this is nominal, since it excludes noise and IR drops. How would you get that? BTW, my outlets usually supply exactly 120V RMS. Unloaded. Power specifications take into account permissible voltage drop under load. The permissible voltage drop includes the +/- 5% tolerance or so permitted at your service panel's 120/240V and the 5% or so voltage drop permitted over the house wiring and supply cords. Which basically means that house power is allowed to be (by code and regulation) anywhere between about 110V and 130V. In other words, some people call it 110V, others call it 120V, and some people pick numbers in between. And of course, most volt meters aren't very good at this accuracy on AC house power either. OK, about the voltage drop and permissible voltage ranges. However that doesn't seem to explain how you got that specific number (117). Are you measuring peak voltage somewhere and calculating from that? The outlets in my house are normally supplying 120V with no load (other than the kill-a-watt meter). Where is the 117V in that? BTW, The voltage numbers I remember hearing about are 110V, 115V, 117V, 118V, 120V, 120V and 220V, 230V, 235V, 240V. -- Mark Lloyd http://notstupid.laughingsquid.com "So far as I can remember, there is not one word in the Gospels in praise of intelligence." --Bertrand Russell |
#11
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convert outlet from 230V to 115V
Chris Lewis wrote: .... Which basically means that house power is allowed to be (by code and regulation) anywhere between about 110V and 130V. .... Can you tell me which NEC sections say that? |
#12
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convert outlet from 230V to 115V
According to Mark Lloyd :
On Mon, 18 Jun 2007 18:57:11 -0000, (Chris Lewis) wrote: Power specifications take into account permissible voltage drop under load. The permissible voltage drop includes the +/- 5% tolerance or so permitted at your service panel's 120/240V and the 5% or so voltage drop permitted over the house wiring and supply cords. OK, about the voltage drop and permissible voltage ranges. However that doesn't seem to explain how you got that specific number (117). Are you measuring peak voltage somewhere and calculating from that? The outlets in my house are normally supplying 120V with no load (other than the kill-a-watt meter). Where is the 117V in that? Stick a toaster on the line, and you'll see something _other_ than 120V ;-) [Our house power, according to my reasonably accurate meter, is 127V. Which makes sense where we live.] I seem to recall somewhere seeing that 117V is the exact calculated RMS value from some specific regulatory "peak" _nominal_ voltage. The point being that because of resistive losses and power station management, it is _allowed_ (by code and power regulations) to vary a fair bit. This means in practise there's a considerable variation in the voltage present on a given outlet, moreso when you figure that many voltmeters aren't very accurate on AC RMS voltages either. BTW, The voltage numbers I remember hearing about are 110V, 115V, 117V, 118V, 120V, 120V and 220V, 230V, 235V, 240V. Think about them as being dialects of "power speak", all meaning the same thing in the end. One of the reasons for that is pragmatic - Eg: motor HP and current draw are often specified at the lower end of the permitted range, because that's worst-case for heat generation/ultimate limits on the device. Other reasons are simply habit - what grandpop used to call it. Like, you say ToMAYto, and I say ToMAWto, but they're both red fruit ;-) -- Chris Lewis, Age and Treachery will Triumph over Youth and Skill It's not just anyone who gets a Starship Cruiser class named after them. |
#13
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convert outlet from 230V to 115V
On Thu, 28 Jun 2007 20:24:57 -0000, (Chris
Lewis) wrote: According to Mark Lloyd : On Mon, 18 Jun 2007 18:57:11 -0000, (Chris Lewis) wrote: Power specifications take into account permissible voltage drop under load. The permissible voltage drop includes the +/- 5% tolerance or so permitted at your service panel's 120/240V and the 5% or so voltage drop permitted over the house wiring and supply cords. OK, about the voltage drop and permissible voltage ranges. However that doesn't seem to explain how you got that specific number (117). Are you measuring peak voltage somewhere and calculating from that? The outlets in my house are normally supplying 120V with no load (other than the kill-a-watt meter). Where is the 117V in that? Stick a toaster on the line, and you'll see something _other_ than 120V ;-) [Our house power, according to my reasonably accurate meter, is 127V. Which makes sense where we live.] Voltage drop with load. I've made different tests. Usually with that meter in an outlet, then plugging in a hair dryer and seeing the voltage change. The amount of voltage drop would vary greatly (usually in the 1V-5V range) depending on things like amount of load and distance from panel. I was wondering why the SPECIFIC value of 117V was mentioned in an earlier post. I seem to recall somewhere seeing that 117V is the exact calculated RMS value from some specific regulatory "peak" _nominal_ voltage. In college I was taught that peak voltage = 1.414 * RMS voltage. In that case, 117V RMS would equal 165V peak. The post I responded mentioned "110 to 120", supposedly referring to the permitted range of supply voltages. This differs from 165V. The point being that because of resistive losses and power station management, it is _allowed_ (by code and power regulations) to vary a fair bit. This means in practise there's a considerable variation in the voltage present on a given outlet, moreso when you figure that many voltmeters aren't very accurate on AC RMS voltages either. BTW, The voltage numbers I remember hearing about are 110V, 115V, 117V, 118V, 120V, 120V and 220V, 230V, 235V, 240, 250V. For some unknown reason, 250V got neglected when I made that list so I fixed the omission. Think about them as being dialects of "power speak", all meaning the same thing in the end. One of the reasons for that is pragmatic - Eg: motor HP and current draw are often specified at the lower end of the permitted range, because that's worst-case for heat generation/ultimate limits on the device. If the permitted range is still 110V to 130V, the lower end is not 117V. Other reasons are simply habit - what grandpop used to call it. Older people do usually refer to "110V" or "220V". Like, you say ToMAYto, and I say ToMAWto, but they're both red fruit ;-) Since the text from , that I responded to got snipped, here it is below. I was wondering where the specific number of 117 came from: IIRC, if you calculate the actual rms voltage, a "110" or "120" volt line is actually 117v. Of course this is nominal, since it excludes noise and IR drops. -- Mark Lloyd http://notstupid.laughingsquid.com "Never underestimate the power of stupid people in large groups" |
#14
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convert outlet from 230V to 115V
According to Mark Lloyd :
I was wondering why the SPECIFIC value of 117V was mentioned in an earlier post. That's what I was answering. I seem to recall somewhere seeing that 117V is the exact calculated RMS value from some specific regulatory "peak" _nominal_ voltage. In college I was taught that peak voltage = 1.414 * RMS voltage. In that case, 117V RMS would equal 165V peak. The post I responded mentioned "110 to 120", supposedly referring to the permitted range of supply voltages. This differs from 165V. You're getting confused. 110 to 120 (or more actually like 130) is the permitted _RMS_ supply voltage range. The sinusoidal peak is indeed in the 165V range. The point being that because of resistive losses and power station management, it is _allowed_ (by code and power regulations) to vary a fair bit. This means in practise there's a considerable variation in the voltage present on a given outlet, moreso when you figure that many voltmeters aren't very accurate on AC RMS voltages either. BTW, The voltage numbers I remember hearing about are 110V, 115V, 117V, 118V, 120V, 120V and 220V, 230V, 235V, 240, 250V. For some unknown reason, 250V got neglected when I made that list so I fixed the omission. Okay.... Think about them as being dialects of "power speak", all meaning the same thing in the end. One of the reasons for that is pragmatic - Eg: motor HP and current draw are often specified at the lower end of the permitted range, because that's worst-case for heat generation/ultimate limits on the device. If the permitted range is still 110V to 130V, the lower end is not 117V. I wasn't saying that 117V was the lower range. I was actually referring to the practise of many motors having a _plate_ rating of thus-and-so Amps at 110V. Since the text from , that I responded to got snipped, here it is below. I was wondering where the specific number of 117 came from: IIRC, if you calculate the actual rms voltage, a "110" or "120" volt line is actually 117v. Of course this is nominal, since it excludes noise and IR drops. You answered that yourself. -- Chris Lewis, Age and Treachery will Triumph over Youth and Skill It's not just anyone who gets a Starship Cruiser class named after them. |
#15
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convert outlet from 230V to 115V
On Thu, 28 Jun 2007 23:39:23 -0000, (Chris
Lewis) wrote: According to Mark Lloyd : I was wondering why the SPECIFIC value of 117V was mentioned in an earlier post. That's what I was answering. I seem to recall somewhere seeing that 117V is the exact calculated RMS value from some specific regulatory "peak" _nominal_ voltage. In college I was taught that peak voltage = 1.414 * RMS voltage. In that case, 117V RMS would equal 165V peak. The post I responded mentioned "110 to 120", supposedly referring to the permitted range of supply voltages. This differs from 165V. You're getting confused. 110 to 120 (or more actually like 130) is the permitted _RMS_ supply voltage range. "110 to 120" is a quote from a particular poster. See the end of my previous post. The sinusoidal peak is indeed in the 165V range. Why would you think I'm confused? Do you disagree with what I said about 117V RMS = 165V peak? About peak being 1.414 of RMS? [snip] -- Mark Lloyd http://notstupid.laughingsquid.com "Never underestimate the power of stupid people in large groups" |
#16
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convert outlet from 230V to 115V
According to Mark Lloyd :
On Thu, 28 Jun 2007 23:39:23 -0000, (Chris Lewis) wrote: You're getting confused. 110 to 120 (or more actually like 130) is the permitted _RMS_ supply voltage range. "110 to 120" is a quote from a particular poster. See the end of my previous post. The sinusoidal peak is indeed in the 165V range. Why would you think I'm confused? Do you disagree with what I said about 117V RMS = 165V peak? About peak being 1.414 of RMS? Neither. I was remarking on this: mentioned "110 to 120", supposedly referring to the permitted range of supply voltages. This differs from 165V. My posting did say I agree with your RMS-Peak calculations. But saying the peak voltage isn't in the permissible (RMS) voltage range is rather odd way of discussing this, don't you think? -- Chris Lewis, Age and Treachery will Triumph over Youth and Skill It's not just anyone who gets a Starship Cruiser class named after them. |
#17
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convert outlet from 230V to 115V
On Sat, 07 Jul 2007 22:58:37 -0000, (Chris
Lewis) wrote: According to Mark Lloyd : On Thu, 28 Jun 2007 23:39:23 -0000, (Chris Lewis) wrote: You're getting confused. 110 to 120 (or more actually like 130) is the permitted _RMS_ supply voltage range. "110 to 120" is a quote from a particular poster. See the end of my previous post. The sinusoidal peak is indeed in the 165V range. Why would you think I'm confused? Do you disagree with what I said about 117V RMS = 165V peak? About peak being 1.414 of RMS? Neither. I was remarking on this: mentioned "110 to 120", supposedly referring to the permitted range of supply voltages. This differs from 165V. My posting did say I agree with your RMS-Peak calculations. But saying the peak voltage isn't in the permissible (RMS) voltage range is rather odd way of discussing this, don't you think? And that's why I said it. I mentioned peak to demonstrate it NOT explaining the use of ONE PARTICULAR VALUE (117). BTW, I accept "110 to 130" as being more applicable than "110 to 120". This still does not explain what is so special about that particular value (117). -- Mark Lloyd http://notstupid.laughingsquid.com "Never underestimate the power of stupid people in large groups" |
#18
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convert outlet from 230V to 115V
According to Mark Lloyd :
On Sat, 07 Jul 2007 22:58:37 -0000, (Chris Lewis) wrote: According to Mark Lloyd : On Thu, 28 Jun 2007 23:39:23 -0000, (Chris Lewis) wrote: My posting did say I agree with your RMS-Peak calculations. But saying the peak voltage isn't in the permissible (RMS) voltage range is rather odd way of discussing this, don't you think? And that's why I said it. I mentioned peak to demonstrate it NOT explaining the use of ONE PARTICULAR VALUE (117). BTW, I accept "110 to 130" as being more applicable than "110 to 120". This still does not explain what is so special about that particular value (117). As I said before, I vaguely recollected that 117V was used in the vernacular because it was the exact RMS conversion of some "standardized" nominal peak voltage. But I've not been able to find any corraboration in Google. The pecularity gets worse when you see documents referring to main supplies as 117/230V, when the latter really should be double the former to be logical. We may simply have to dismiss it as a "historical quirk"/"common usage". Eg something approaching slang. -- Chris Lewis, Age and Treachery will Triumph over Youth and Skill It's not just anyone who gets a Starship Cruiser class named after them. |
#19
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convert outlet from 230V to 115V
On Mon, 09 Jul 2007 14:34:45 -0000, (Chris
Lewis) wrote: According to Mark Lloyd : On Sat, 07 Jul 2007 22:58:37 -0000, (Chris Lewis) wrote: According to Mark Lloyd : On Thu, 28 Jun 2007 23:39:23 -0000, (Chris Lewis) wrote: My posting did say I agree with your RMS-Peak calculations. But saying the peak voltage isn't in the permissible (RMS) voltage range is rather odd way of discussing this, don't you think? And that's why I said it. I mentioned peak to demonstrate it NOT explaining the use of ONE PARTICULAR VALUE (117). BTW, I accept "110 to 130" as being more applicable than "110 to 120". This still does not explain what is so special about that particular value (117). As I said before, I vaguely recollected that 117V was used in the vernacular because it was the exact RMS conversion of some "standardized" nominal peak voltage. But I've not been able to find any corraboration in Google. The pecularity gets worse when you see documents referring to main supplies as 117/230V, when the latter really should be double the former to be logical. We may simply have to dismiss it as a "historical quirk"/"common usage". Eg something approaching slang. OK. Thanks for answering my question. -- Mark Lloyd http://notstupid.laughingsquid.com "Unlike biological evolution. 'intelligent design' is not a genuine scientific theory and, therefore, has no place in the curriculum of our nation's public school classes." -- Ted Kennedy |
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