Can you make both ends meet? "Charges" is a capacitor. How were campers harmed by a big capacitor? And why did others, located miles away, feel nothing? Why were cows ten meters from a struck tree killed? And none on that other farm felt anything? Electricians are never taught these basic electrica...

What is the value of this text and what Feynman has to do with it? What Feynman discusses was also discussed here. But again, you do not even read what is written. Instead you only read what you want to believe. Somehow confused is how lightning travels through earth (what Feynman discusses) with a...

Tell some story about cows killed 4 miles away. Please read what is written; not what you want to see. Nobody said cows four miles away were killed. Another strawman is invented. And further suggests you do not have he education that was claimed. Please only read what is written; not what you want ...

All places on the Earth are connected. Apparently you also think electricity is same at both ends of a wire. Obviously it is not. Obviously all places on earth are not fully conductive. A lightning strike to earth means nearby earth is quite charged. And earth miles away is not. Lightning struck a ...

Physics and electrical engineer Olle P, can't you spot what is wrong even in these latest posts? Repetitive naysayer Klusu cannot and does not because his denials come from hearays - no knowledge. An engineer, who was doing this stuff, says what works, what is a scam, and says so by even citing spe...

From an AT&T forum on "How can I protect my DSL/dialup equipment from surges?": Surge protection takes on many forms, but always involves the following components: Grounding bonding and surge protectors. ... Grounding is required to provide the surge protector with a path to dump the excess energy t...

Just an example from a few posts above: * ... Not really. * ... * Ideally that shunt, or parts of it, should lead to Earth, since our planet acts like a huge capacitor that absorb and spread the energy. * Realistically more layers of similar protections are required to really make the event harmles...

This is why I mentioned PFC. Seems to me you were the first to write about PFC. ... Is not it 80kV? ...The main reason is cheap manufacturers want to save those 5 cents. Better manufacturers still use MOVs. Defined was how a power supply works and why it already is protection superior to any of tho...

So, why did you two decide to restart this conversation/argument after 6+ years? Where was a previous discussion about useless PFC and the robust protection already inside electronics? Where did he declare that radio frequency spikes, AC electricity, and waveforms are all somehow different (without...

No. An example of "filtering with PFC" has not been posted. PFC is irrelevant. Circuits that do protection, better than an adjacent protector, exist with or without PFC - active or passive. Why constantly discuss things totally irrelevant to these electrical concepts. You even foolishly argued abou...

I've been working professionally with electrical safety (in medical devices) for more than twenty years and have education in how electrical installations is done in medical facilities such as hospitals. An electrician is only taught concepts relevant to human safety. Clearly impedance is completel...

OP asked for surge protection. But only discussed mythical solutions including a Novaris plug in, Eaton POD, SurgeX series mode filter, tiny joule Tripplite Isobar, Monster cables (that routinely identifies scams, then sells an equivalent product at higher prices), and Ferroresonant transformer. Fac...

The cable consist of two wires (coaxial) that typically only has a low voltage between them. Obviously you did not learn how and why modems are damaged. For some strange reason, assumed is a surge is incoming on a cable, it has no outgoing path, and magically does damage. That entire conclusion is ...

Millimeters separation isolates about 1000V. Can your PSU survive 1000V? First, yes it must. Back when the IBM PC first appeared, international design standards required 120 volt electronics to withstand up to 600 volts without damage. Or view this datasheet for a signal interface IC. What must it ...

Btw, ferroresonant transformers may be the best protectors (but they have their drawbacks). Again a mistake of making a conclusion only from hearsay. Put some numbers to your belief? What is its galvanic isolation voltage? A fact that must be learned long before making any conclusion. How does a mi...

I've had a surge problem it came through the network cable. (Using cable-TV for Internet as well.) The WAN-side of my router died quietly as a result. A surge is electricity. It must have an incoming and a completely different outgoing path. If incoming was on a TV cable, then what was the outgoing...

Who converts, if not active PFC? Waves. spikes, and AC waveforms ('dirty' or not) are all a sum of sine waves. Please relearn Fourier Series as taught in high school math. All are subjective expressions for a same thing. If you disagree, then I am viewing numbers and mathematics that says otherwise...

So no more radio waves. Good. What you have called AC are radio frequency waves or spikes. No difference. It is not a DC current. Is it a wave, spike, or 'dirty' AC waveform at radio frequencies. Nobody was saying anything about active PFC. Where did that come from? Typical power supply is powered ...

DC is converted to AC. Not to radio waves. DC is converted to AC - at multiple radio frequencies. Multiple frequencies that create spikes. And that exceed 300 volts. 'Dirty' is a vague expression for layman whose eyes glaze over with every number. That created AC is spikes that occur at radio frequ...

Any more ideas ? I am out of ideas that can be performed at a layman's level. To be clear, the green wire should rise above 2.4 volts just before (almost instantly before) a PSU powers off. That is the power controller ordering a PSU to powering off. Maybe the gray wire is asking for power off by d...

The power button header is 3.39V unpressed and 0.00V when pressed. That 3.39 number is troubling. It should be higher. Normally a pullup resistor would make it closer to 5 volts. At 3.39, that might only be leakage currents from the power controller. So that noise could easily cause the controller ...

Another simple thing to test are the AC outlets themselves to see if they are wired correctly and there's not a swapped neutral and hot wire in one. If reversed polarity caused a problem, then numbers from the meter clearly identified that defect. It was not identified by numbers. All appliances wo...

I notice nothing spectacular; it just goes from one value to the other in less than a second. From ON to OFF, going back to zero usually takes longer, but at this point, the machine is stuck in an endless on/off loop so it difficult to measure. OK. The many components of a power system are OK. Some...

Any suggestion forward ? Try using a paper clip to get into those other connections. If necessary, partially insulate that paper clip with scotch tape. Removing a heatsink is not recommended since good diagnostic procedure must collect all facts before making any changes. If the CPU is not an Intel...

So my question is as follows: IF my motherboard and/or CPU are burnt again, what could I possibly do to make sure that it doesn't happen again 15 months from now? What could be the cause of these repeating failures and how could I make sure that I am taking the right steps to prevent them from happ...

Length of the wire is important but I would also say that cross section is important and have first hand experience of this. That demonstrates confusion of human safety requirements with transistor safety. Human safety requirements (ie code) defines wire thick enough (ie 4 mm) for human safety. Tha...

Yes, like the 10mm earth cable that comes right out of our consumer unit with it's built in surge portector and goes into the ground outside via a large earth rod. The same earth connection which is also connected to all electrical outlets in the house because we do use earth ground and don't do cr...

I know it the US it isn't but we do use earth ground for mains outlets here. US receptacles also have three prongs; the third is a safety ground. A popular UK myth is that US power points (receptacles) only have two prongs. Your earth ground does same as earth grounds all over the world. 'Context' ...

An AT&T forum provided "How can I protect my DSL/dialup equipment from surges?": Surge protection for DSL and dialup service. Surge protection takes on many forms, but always involves the following components: Grounding bonding and surge protectors. ... Grounding is required to provide the surge pro...

Do not earth an appliance. I'm sorry but this advice is highly unsafe. Any appliance with exposed metal parts must be earthed. . I never said an appliance must not be safety grounded. I was very specific about the difference between safety ground and earth ground in that longer post. Did you get th...