USB shield at device.

I just mean people use things other than consoles as inputs a lot these days, since a nice console can run mid six figures.

Yes. I replicated them. Cable run from output to input, 1 KHz tone.

To an extent. Anything below -96dB is moot.

Ideally, yes.... some of the Jensens test linear out past 20Khz, but they'll still react to transients.

My point is that there is relative audiphoolery where people buy stuff

Some of this isn't so phoolish.

The builders do that too.

I thought you just said that USB was all that was important.

You've led a protected life.

If you say so. Who would argue with you?

Spoken by someone without a clue. The need for audio amplification spurred electronics. It is Analog, which you need for the digital crap you play with.

Anyone with real world experience.

I didn't say that. That would be silly.

No more silly than your other statements.

In other words, no more silly than the other things that I never said.

You don't read very well.

But I have an ohmmeter, and tested all the USB devices that I have handy, and all of them ground everything.

If this is a three phase system with lots of electronics (rectifier) loads without PFC, there have been incidents, in which the neutral conductor have been burned due to third harmonics of the load.

While in a three phase the fundamental currents from each phase cancel more or less, the third harmonic current add up into the neutral conductor. For modern three phase cables, the neutral conductor derating is not so common.

Yes, and this will always be the case. Stupid people will do stupid things. The blanket "same size" rule doesn't apply above a certain point, though. Intelligence is supposed to rule above that.

Certainly it is. Do you see a neutral on transmission towers?

As I said, you don't read very well.

What is the FCC ID number for this transmitter? Where is it installed? What is the duty cycle? A bunch of Broadcast Engineers want to know the details, on a transmitter group.

I had to read this several times, before I started to guess what you are saying.

Apparently a "transmission tower" is not a mast sending out RF energy but just an ordinary HV pylon.

At high power low voltage industrial feeds, 400 or 690 V delta (Europe) or US 480 V delta are used to feed big motors.

In HV distribution, delta connection is often used, so you do not have a neutral at all.

You are deep into whiney, content-free, old-hen mode.

The thread is about grounding cable shields on USB devices. I answered it.

Do you have a DVM? Verify the grounding scheme on a few commercial USB devices, and get back to us. Check connector shell vs pin4 vs power ground vs case ground if available.

Part 18 compliant. Near field only. Under 400kHz. Very high SWR tolerance. Frequency agile. Continuous duty (well, if it didn't overheat -- when I left, the MEs were still figuring out the enclosure and bus designs).

I don't think any were installed in customer locations, which is a shame because the electronics were pretty good. But that project suffered from executive incompetence beyond my control.

Oddly, for working literally one block away from the airport, we never got calls about EMI. I can personally testify that *none* of the industrial power electronics used come with EMI filters (we put one in this design, at least).

Tim

No, it's just that you refuse to talk about what everyone else is talking about. You don't even acknowledge content so why add any?

No, it's not. If you could read, you'd see that there is far more going on in this thread than USB.

Again, you're incapable of reading.

Whiney old hen. Say something about electronics.

So, this is an induction heater?