Please read as "Here N is connected to PE just before individual single phase 230V house installations in a few possible ways". Semantics, otherwise no relevant difference.
Many things can go wrong. Especially when technical people are involved 🙂
Depends on region.
Here in the states we usually have 240 volt transformer dropping voltage from provider.
It is center tapped. For Wall voltage it is using 1/2 the tap for 120 volt.
Center tap is ground. So neutral and " ground" is connected to the same Buss for 120
Here in the states we usually have 240 volt transformer dropping voltage from provider.
It is center tapped. For Wall voltage it is using 1/2 the tap for 120 volt.
Center tap is ground. So neutral and " ground" is connected to the same Buss for 120
You wouldn't believe how many out there do not understand that concept.
The photos of the handcrafted power conditioner are something to behold. I can tell you how impressive it looks to be. I don't doubt that it has all the capabilities that were designed into it.
Personally, I ended up with a large isolation transformer and some filtering. I am happy with it.
The photos of the handcrafted power conditioner are something to behold. I can tell you how impressive it looks to be. I don't doubt that it has all the capabilities that were designed into it.
Personally, I ended up with a large isolation transformer and some filtering. I am happy with it.
That is why they added the 3rd prong so its difficult to reverse polarity or impossible
like older plugs.
If you remove the 3rd prong or ground. It is still difficult to reverse polarity
because one blade is larger than the other.
Being neutral goes to " ground" regardless.
And ground goes to the ground for lighting strikes
like older plugs.
If you remove the 3rd prong or ground. It is still difficult to reverse polarity
because one blade is larger than the other.
Being neutral goes to " ground" regardless.
And ground goes to the ground for lighting strikes
Well, I've switched to optical between the pc and the box that does the da conversion. I'm also busy cleaning up the mess of wires so that signal and power don't run near each other. I've relocated my wifi router to the other side of the room and run cat5 to the pc, turning off wifi. I'm separating the amps from each other. Should have done this long ago but my honeydo list grows longer every day. We'll see if this helps when I'm done.
I do wonder what difference it would make even in a perfect situation. Some guys claim noisy power does something to the sound and they go so far as running their equipment off dc batteries. I don't think I need to go that far...
I do wonder what difference it would make even in a perfect situation. Some guys claim noisy power does something to the sound and they go so far as running their equipment off dc batteries. I don't think I need to go that far...
Most noise issues with American wiring is 60 zillion feet of green wire
making endless ground loops and noise.
Or corrosion on the buss connections making more weird loops or noise.
DC on the line is regulated. But depending on many factors.
If it is on the high side, it can make problems.
For water areas like kitchen or bathroom lighted pool the green wire is needed
to detect very very small differences in current to pop a interrupt.
The larger blade and 3rd prong solved " most" the issues.
For a very fast breaker or low current detection you need the 3rd wire.
Aka noise loop
The music wont " sound" different. You have low frequency or DC noise
or dont.
making endless ground loops and noise.
Or corrosion on the buss connections making more weird loops or noise.
DC on the line is regulated. But depending on many factors.
If it is on the high side, it can make problems.
For water areas like kitchen or bathroom lighted pool the green wire is needed
to detect very very small differences in current to pop a interrupt.
The larger blade and 3rd prong solved " most" the issues.
For a very fast breaker or low current detection you need the 3rd wire.
Aka noise loop
The music wont " sound" different. You have low frequency or DC noise
or dont.
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The electrical committees agreed on these terms and abbreviations for Line, Neutral and Protective Earth. This to avoid confusion with common, ground, earth etc. Ground as in GND is at the secondary side of transformers/power supplies and it is not necessarily connected to PE. PE is the thingie for safety and in its apparent simplicity often misunderstood together with its companions the ground fault circuit interrupter and the good old fuse (senior but still going strong).
The complexity is hidden in simplicity.
The complexity is hidden in simplicity.
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This has no importance when the balanced switch is on : the GND reference becomes the center of the secondary transformer. Even in TT regime, you barely find 0 between N and E : it varies from a point to another, depending on what is connected, the hour of the day, and it is totally imbalanced.
It should, yes - at least in TT mode - but the reality is often different...
T
Forget it. I deal with isolation transformers for decades and their special way to obtain ultra low leakage. The "balanced" versions are purely commercial meant and produced solely for audio but one would almost forget they are also balanced without a secondary middle point 🙂 They are not isolated and they are not 100% safe. They can cause trouble with some older switched loads too when only L or N is switched as there can be half the mains voltage still being energized. The electrical committee here knows this but apparently it takes ages in the EU to regulate items.
There is no GND in the circuit, only PE (Terre).
There is no GND in the circuit, only PE (Terre).
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The EU doesn't regulate this, because it is simply no real problem for the normal person living here.
The huge majority of injuries with electricity happen to professionals or people that do stupid, dangerous things, like climbing on moving train tops or the like.
No EU regulation will improve anything, if those who should know, ignore safety rules or people want to risk their lifes just for fun.
I will try to describe the nonsense that has to be done if a professional changes a lamp on the wall:
Anything has to be taped off like a crime scene, devices installed in the fuse box, so nobody can switch power on again or enter the working area. A guard has to be put in place and then, finally, the electrician in special clothing can change the lamp. That is how it has to be done... otherwise the insurance will not pay.
Your mom would simply get a ladder and change the light bulb, as she did for all of her life, but she is no trained and certified electrician.
That is what happens when "regulators" make things "safe".
The huge majority of injuries with electricity happen to professionals or people that do stupid, dangerous things, like climbing on moving train tops or the like.
No EU regulation will improve anything, if those who should know, ignore safety rules or people want to risk their lifes just for fun.
I will try to describe the nonsense that has to be done if a professional changes a lamp on the wall:
Anything has to be taped off like a crime scene, devices installed in the fuse box, so nobody can switch power on again or enter the working area. A guard has to be put in place and then, finally, the electrician in special clothing can change the lamp. That is how it has to be done... otherwise the insurance will not pay.
Your mom would simply get a ladder and change the light bulb, as she did for all of her life, but she is no trained and certified electrician.
That is what happens when "regulators" make things "safe".
That is the black side of the EU but they do regulate albeit in a delayed and after the facts way. Worse than the former nationally arranged regulations.
Selfregulation by the companies just does not work optimal. Thankfully real dangerous stuff is eventually banned but always after it has been sold. Pre-sales testing and approval by governmental organisations in the past was a good method to weed out the real bad stuff.
Todays certification & exaggerated ultra-safety circus is absolutely despicable and by no means an improvement. With a shortage of technicians and the already poor availability of educated and experienced ones they may not even be allowed to do the job without recent certification. Fine techs are seen as uneducated retards when the company issued certification runs out. 50+ techs are sometimes forced to re-educate (“your education has expired”) and need to reapply for their own job! This all undermines value of individuals really.
Still I am glad things have been designed and improved with regards to safety. Especially the dutch NEN and german VDE regulations that are pretty well thought out. Not too long ago the number of deadly incidents was quite high.
Selfregulation by the companies just does not work optimal. Thankfully real dangerous stuff is eventually banned but always after it has been sold. Pre-sales testing and approval by governmental organisations in the past was a good method to weed out the real bad stuff.
Todays certification & exaggerated ultra-safety circus is absolutely despicable and by no means an improvement. With a shortage of technicians and the already poor availability of educated and experienced ones they may not even be allowed to do the job without recent certification. Fine techs are seen as uneducated retards when the company issued certification runs out. 50+ techs are sometimes forced to re-educate (“your education has expired”) and need to reapply for their own job! This all undermines value of individuals really.
Still I am glad things have been designed and improved with regards to safety. Especially the dutch NEN and german VDE regulations that are pretty well thought out. Not too long ago the number of deadly incidents was quite high.
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A little off topic really. The work environment that I worked for 30 years in tried to make things safer, yet the attempts were actually more dangerous and clumsy. I won't get into details here. Just to point out that the thinking is world wide. Safety slogan for the phone company was
~No job is so important and no service so urgent that we cannot take time to do the job safely~
~No job is so important and no service so urgent that we cannot take time to do the job safely~
Yep, the lower case word 'ground' as some many different many and even more incorrect meanings, it's very confusing.
But terms like Line/Hot, Neutral and Safety Ground/Protective Earth are understandable.
Less clear are names for Planet Earth.
In the US the technical name for Safety Ground is Equipment Grounding Conductor (EGC) system.
And the connection to Planet Earth is the Grounded Electrode Conductor (GEC) system.
* * * * * * * * * *
The Safety Ground (EGC) is only connected to the Neutral.
It is the Neutral that is connected to Planet Earth thru the (GEC).
But terms like Line/Hot, Neutral and Safety Ground/Protective Earth are understandable.
Less clear are names for Planet Earth.
In the US the technical name for Safety Ground is Equipment Grounding Conductor (EGC) system.
And the connection to Planet Earth is the Grounded Electrode Conductor (GEC) system.
* * * * * * * * * *
The Safety Ground (EGC) is only connected to the Neutral.
It is the Neutral that is connected to Planet Earth thru the (GEC).
I'm going to violate a rule on this site and actually respond to an actual statement/question...
Once long ago I put a choke-capacitor line filter in the ac line going to my turntable. And it did have the desired effect -- the music sounded nicer. But one day I measured the output voltage of the filter, unloaded, and it was in the area of 150 volts. It's a miracle I didn't blow up anything in the turntable.
So...don't do that.
.
I had a guy on my crew that involved the electrical inspector once on a job that was 'perfect'. Perfect that is, until the inspector got involved and involved another inspector who took it up the ladder, and on it went. The job ended up in disaster, and was rebuilt TWICE before we built it one more time as it was written to begin with! It wasn't actually my lesson to learn, but the action of another, that the more people that you involve, the worse it gets. These days, I rarely ask more than a couple of 'experts' for their perspective.
True. Same experience here. I was involved in such a project that was rebuilt. Then the person in charge (even a electrical committee member) that ordered the rebuild again disapproved. The people rebuilding told him to sleep a few nights over it and just left.
A very good example of the risks of measuring by ear without even basic voltage measurement to verify correct operation (both unloaded and under load).
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Why not just get a conditioner used in professional audio? Contains pretty sophisticated technology to clean up the line, protect your gear and ground the cable TV and telephone lines. Just don't plug your power amp or receiver into it, it is not made for high current devices.
https://www.amazon.com/Furman-Power...62-b8d2-dc17077257fd&pd_rd_i=B0009GI7NC&psc=1
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