Weird, the quote function adds the multitask statement, it's not visible in the orig post.
I take it you are saying that the filter should not push more than 4mA into the grounding conductor in any case, as there is a possibility that grounding is lost, like breaking off the ground pin of the plug.
That is a reasonable thing to worry about.
John
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You can't trust the result on just the basis of that test. The conclusion made can certainly be correct, but the test didn't isolate it from possible other factors. If a hundred out of a hundred astrologers predict the sun will rise tomorrow, the sun will rise but the astrologers have zilch to do with it.
Can I have some? Total logical fallacy, diversion, plus a big fat red herring.
Yes. It's a tad more complex only in that it must be capable of sourcing 4mA at a level greater than 50 volts (the currently assumed danger level). Being capable of delivering 4mA to bonding conductor is not in itself lethal if the voltage isn't there for a human body model.
Delivering more than 4mA to the bonding conductor will definitely trip GFCI's, as it should be of course.
John
Questions of Like or Predictions is a different condition/question. You need to ask the question better so that there is little room for bias or guessing.
-RNM
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All of the above IYO. Here we go again... going for debating points. Going for points on choice of descriptors, spelling mistakes etc etc.
DBT tests/questions are not very accurate for a lot of audio related matters. IMO. It works often enough. But often enough it doesnt..... based on a larger - even less controlled - data base.... and That is the more important result.
IMO
THx-RNMarsh
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Apply a load line to the problem.
4mA sourced to ground from 120v is 2 mA sourced at 60 volts.
For all the electrical safety being pushed around here (my work), they specify 50 volts as the threshold.
NEC also requires the bonding conductor limit the energized surface to 50 volts max as well.
So if I specify 4mA at a presumably lethal level of 50 volts, that means I've sourced 4 mA from 70 volts. or 17.5 Kohms. That will deliver 6.8 mA to ground.
If I have a Y filter with two identical caps to ground, one from hot, one from neutral, the open voltage will be 60 volts, so it will only source 10 volts with double capacitance from 60 volts to 50 volts.
John
Does it have to be in a bathroom to worry about ground currents? I do not know if code will eventually require GFCI's throughout the house, but I do know the number is based on what does NOT trip a GFCI. They used to be required to NOT trip at 4 mA, and absolutely trip at 6 mA. I believe the deadband was for manufacturing tolerances.
I live in an old village, many of the houses still have steam radiators. So far, I've not seen PEX runs for steam heat, although many newer baseboard installs are starting to use it. I understand it's good to 100 psi at 180F (IIRC), baseboards run 15 to 30 and at about 160F.
I recall the days of the 5 tube radio, and the steam radiators.. Man, that hurt..
John
What if we remove artifacts of recording and it sounded better ---- With the powerful DSP we have, maybe someone will soon develop algorithms to remove the audible group-delay caused by the digital recording/playback process. An algor for a particular popular recorder, too. Or even a complete record/play system.
Oh, someone just did that. Bet you a dollar MQA is there.
THx-RNMarsh
Oh, someone just did that. Bet you a dollar MQA is there.
THx-RNMarsh
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