Hello
*Note: In case you do not fully understand, tell me to translate better.
I am a Spanish electrician, residing in Spain, and I have some curiosity about the standardization of American voltage.
In my country had always used 127 V for domestic use, but over time that has passed, some countries insisted that much to install 220/380 V, 127/220 V instead
In the 80s in Germany became the IEC60038 standard, which recommends that all work to 230/400 V, but does not justify the choice of this tension.
What I really want to find out is whether there is a similar rule to recommend 120 V (120/208 V).
The short history of my country is that it began using voltages of 110-127 V, but in 1910 is approximately standard 127/220 V and 380V shortly industries and small plants. In the years 60-70s starting to become popular single-phase 220 ??V and 380 V three-phase outside the industry, but still majority 127/220 V. In the years 70-80s some companies change the voltage, changing the transformer 220/380 V distribution, but others maintain 127/220 V. And now with both increased distributions to European voltage 130 V (133 exactly), 230 V, 400 V.
Although I am aware that as an electrician with more voltage is needed less thick wire, I think it is right what they have in the US and other countries, 120 volt. In my country we have distributions of 130/230 V and 230/400 V, and have had the opportunity to interact with both, and this experience has shown me that working with 230/400 V, if only one phase is much more dangerous with 120/208 or 130/230 V. for this reason alone, the world should be standard voltage 120-130 V.
I honestly do not know how to be the first US power in the world has not become more popular proper voltage versus European dangerous voltage. The 400 V should not have ever come out of the industry, imagine him in a home? It is not uncommon in my country.
I also read on a website that "the distributions of 120 V (240 V single-phase or three-phase 208) can not make a distribution network, while a 230/400 V distribution can reach great distances, and that 120 V transformer is needed in each building."
With more voltage you can go further, but that this is very exaggerated, because in Spain we have assembled networks 130/230 V to 230/400 V concept (phase transformer up to 1000 kVA, max aerial wired networks of 3x150 mm2+95mm2 and underground with 3x240 mm2+150mm2) and it is possible to supply a number of points with a distance respecting brownouts. In Europe measured the thickness of copper in square millimeters, diferent to AWG.
I show a picture of a meter of 127 V 50 Hz:
http://www.foroelectricidad.com/download/file.php?id=1970
And old 3-wire meter, identical system to that used in their homes with two phases and neutral:
http://www.foroelectricidad.com/download/file.php?id=1969
I hope I have not violated any rules of presentation, as it can hab?rseme skipped some text in English.
regards
*Note: In case you do not fully understand, tell me to translate better.
I am a Spanish electrician, residing in Spain, and I have some curiosity about the standardization of American voltage.
In my country had always used 127 V for domestic use, but over time that has passed, some countries insisted that much to install 220/380 V, 127/220 V instead
In the 80s in Germany became the IEC60038 standard, which recommends that all work to 230/400 V, but does not justify the choice of this tension.
What I really want to find out is whether there is a similar rule to recommend 120 V (120/208 V).
The short history of my country is that it began using voltages of 110-127 V, but in 1910 is approximately standard 127/220 V and 380V shortly industries and small plants. In the years 60-70s starting to become popular single-phase 220 ??V and 380 V three-phase outside the industry, but still majority 127/220 V. In the years 70-80s some companies change the voltage, changing the transformer 220/380 V distribution, but others maintain 127/220 V. And now with both increased distributions to European voltage 130 V (133 exactly), 230 V, 400 V.
Although I am aware that as an electrician with more voltage is needed less thick wire, I think it is right what they have in the US and other countries, 120 volt. In my country we have distributions of 130/230 V and 230/400 V, and have had the opportunity to interact with both, and this experience has shown me that working with 230/400 V, if only one phase is much more dangerous with 120/208 or 130/230 V. for this reason alone, the world should be standard voltage 120-130 V.
I honestly do not know how to be the first US power in the world has not become more popular proper voltage versus European dangerous voltage. The 400 V should not have ever come out of the industry, imagine him in a home? It is not uncommon in my country.
I also read on a website that "the distributions of 120 V (240 V single-phase or three-phase 208) can not make a distribution network, while a 230/400 V distribution can reach great distances, and that 120 V transformer is needed in each building."
With more voltage you can go further, but that this is very exaggerated, because in Spain we have assembled networks 130/230 V to 230/400 V concept (phase transformer up to 1000 kVA, max aerial wired networks of 3x150 mm2+95mm2 and underground with 3x240 mm2+150mm2) and it is possible to supply a number of points with a distance respecting brownouts. In Europe measured the thickness of copper in square millimeters, diferent to AWG.
I show a picture of a meter of 127 V 50 Hz:
http://www.foroelectricidad.com/download/file.php?id=1970
And old 3-wire meter, identical system to that used in their homes with two phases and neutral:
http://www.foroelectricidad.com/download/file.php?id=1969
I hope I have not violated any rules of presentation, as it can hab?rseme skipped some text in English.
regards