> the voltage in those two power-carrying wires is constantly switching directions
I'm not buying this (in the USA). I've been in my breaker box. For a typical 110 volt outlet, the black (hot) wire is connected to the breaker, which is connected to one of the wires coming into the house from the street. The white (neutral) wire is connected to the same ground bracket that the bare (ground) wire is connected to.
240 volt connections (like my dryer and range) are taking a hot line from one of the lines coming into the house and another hot line from the other line coming into the house. You can see it on the bus bars in the breaker box. That's why dual breakers are used. Adjacent breakers pull for different bus bars.
Right, that is correct. To understand how that works, you have to realize that there is no such thing as an "absolute voltage", only the voltage difference between two wires.
In a breaker box, one wire (white) gets tied to ground, and the other wire (black or red) goes between +170 (relative to ground) and -170 (relative to ground). The black and red wires are 180 degrees out of phase, so when the black wire is at +170, the red wire is at -170. This gives a 340V peak difference between the black and red wires, which averages to 240V. You get your normal 120V outlet power between the hot legs and ground/neutral, and you get your 240V dryer & water heater power between the two hot legs themselves.
So, in a normal outlet, we can safely say that one wire is "more positive" than another, and that this flip-flops through time. When we look at voltages relative to ground, though, one wire stays put at 0V while the other goes between +170 and -170. It's just a question of where you put your reference frame.
There are two phase wires and one neutral. Diff between phases is 240V, the diff between any phase and neutral is 120V.
In Europe, you have three phases (R,S,T) and neutral. Here the diff between any phase and neutral is 250V, and the diff between any two phases is 380V.
In Europe, you have three phases (R,S,T) and neutral.
Is that everywhere, to every building?
In the USA, of necessity, power generation is three phase, large scale power distribution is three phase. What's confusing is that the previous discussion didn't differentiate between residential and commercial.
In USA residential areas nobody gets all three phases to their house or apartment. As discussed in previous comments, a house gets two hot wires and a neutral. In fact, to save money, sometimes entire neighborhoods only get one or two phases[1]: "spur lines" branching off the main line to provide power to side streets often carry only one or two phase wires, plus the neutral
In commercial and industrial settings it's common and necessary to deliver all three phases to the building. E.g. large electric motors require all three phases.
The explanation in that paragraph is not necessarily incorrect, just confusing because it talks about voltage "in" wires and isn't clear about what two terminals are being referenced.
It is true that the voltage between live and neutral changes sign, so neutral is sometimes 170V above live. But neutral is almost always at ground, and live goes to -170V relative to ground.
That last paragraph though seems wrong, so OP may have been confused himself when writing.
This isn't true in your home. The neutral is bonded to ground at a single point, in the main panel of your house. Current essentially all returns on the neutral to secondary of the pole xformer. The Earth is much higher impedance than the path back to the pole. Even during a ground fault event the current returns on the ground (technically EGC) to the bond point in the panel, and then from there back to the secondary of the utility pole.
Grounding to earth itself mainly serves to hold the potential of your house near that of the pole.
I'll bite, because I could use more insight. As far as I can tell, he references daily bars—to see the effect that you referenced, I had to reduce the bars to ~ 3 - 15 minutes.
Otherwise, the pattern looks quite the opposite to me. Am I missing something? If not, could something like that somewhat reasonably be applied to trading at that time scale? Seems like a good way to never get any sleep!
I just tend to recognize the patterns in any timeframe. They're everywhere. If I were a day trader, that was a trade I would have taken, but I don't have the patience to sit and stare at the screen like that all day.
So is their argument that by including their hostname in easylist, you are circumventing copyright controls because they validate copyrighted material usage? The takedown notice didn't seem to be related to the domain name per se, but rather the effects of including it in easylist. IOW in order to view our client's copyrighted material, we are providing access controls and by denying the code access to our server, you are circumventing those access controls.
Looking at the source of the page, there's a paywall div blocking the way, that's not visible. For me, it's probably related to all the JS errors uBlock Origin is causing to be thrown.
No, of course not, but we've never seen anything like what we're witnessing today. There's reality, and then there's Trump's version of reality, and the 40% that believe everything he says, despite facts to the contrary.
Concur. My credit union recently switched the backend processor for their credit card. Now, the only option for transaction download is csv or xls. Welcome back to the 90s.
My first programming job, also.
One Christmas in the late 70s I had three 5120s set up in my living room. I was programming a complete accounts receivable system with reporting and data entry (I was an accounting major, long before small colleges had CS degrees). When all three were running I could turn the heat off, and still have to open a window in the middle of winter. I paid off my college loans with those computers.
One thing not mentioned in any of the discussions was how impossibly slow the systems were. I ran the sieve program from Byte magazine a few years later and the results came out in last place.
I coded in BASIC and the IBM BASIC had a wonderful ISAM built right into the language that made it very easy to handle indexed files. If you have ISAM, you don't need a database.
I took my last 5120 to the the salvage yard 30 years ago. I still have some 8 inch floppies with the code for my very first programs. Unfortunately, I have no way to read them.
