Products > Test Equipment
Test Equipment Anonymous (TEA) group therapy thread
Zucca:
South Carolina.
mnementh:
Hmmm... SC seems pretty rabidly Republican since Reagan... not sure how that relates to Big Energy domination in the state. :-//
Of course where I lived in Tejas is known as "The Energy Corridor" for a reason; they own everything and everyone from top to bottom. That kind of corporate cronyism is exactly the sort of thing I'd expect there.
I wish you luck, my friend. I do hope you'll be able to get free of the yoke. ;)
mnem
*knocks self unconscious with a 4-aught mallet* :=\
bd139:
This is extremely cool for an electronics book.
No Starch Press. Open Circuits: The Inner beauty of electronic components:
https://nostarch.com/open-circuits
Chapter 1 PDF https://nostarch.com/download/OpenCircuits_Chapter1.pdf
I will buy a hard copy of that when it comes out.
AVGresponding:
--- Quote from: mnementh on July 01, 2022, 07:27:33 pm ---
--- Quote from: AVGresponding on July 01, 2022, 05:22:49 pm ---
--- Quote from: mnementh on July 01, 2022, 04:28:18 pm ---
The wedge does form if you do the 2nd crimp far enough away; it forms between the 2 crimps. A mm wide and deep (less, really) is all the wedge needs be to provide more than adequate mechanical strength. When I talk of the 2nd crimp being "for good measure" it is to increase the contact area under compression for lowest resistance, not mechanical strength.
These are not brake cables or the like; mechanical strength does not need to be that much in engineering terms to be stronger than any mechanical stress it should ever experience. mnem :blah:
--- End quote ---
You haven't seen how some "engineers" rag on cables connecting big batteries in big strings... you'd think the prospect of instant death if there's a serious short would moderate their behaviour, but as the old saying goes "familiarity breeds contempt".
If you do the arithmetic, you'll see that even a single crimp will have more surface contact area than the cable CSA. I'm not saying it's inherently bad, I'm just saying I prefer the guaranteed mechanical strength over the possible few nano-ohms difference a second crimp makes.
Mostly these things will only make a difference in edge cases; I routinely "crimp" 10-95mm2 lugs with my trusty 2PH and a hammer (only if I don't have a proper crimper to hand and it needs to be done NOW. Bigger than 95mm2 and I need a hydraulic crimper which I don't have, so those have to wait until it gets hired). Haven't burned any buildings down yet. ???
--- End quote ---
I think we've both come to a similar understanding of what's important when making heavy-ass cables (heavy ass-cables def need to be made for mechanical strength FIRST >:D) ; just coming at it from different directions. ;) I spent a fair bit of time doing scale RC drag racing, where fractions of a ohm do make a difference you can see on the clock, then working on big forklifts as a young mechanic... so I'll just say it can matter. :-//
When you say "rag on cables", I'm guessing you mean something different than I would? Over here, to "rag on" something means to "frequently, repeatedly denigrate" whatever it is... ie "In the TEA thread, we always rag on RIFAs and tants!"
So from the context, I'm guessing you mean something like "to put it on carelessly" or to "assemble poorly and without regard for proper procedure"...? :o
mnem
*luggable... barely*
--- End quote ---
Nano-ohms making a difference? Oh come on, even a few micro-ohms would be essentially undifferentiable at those loads. Milliohms, yes, fair enough.
Here, "ragging on" means physically abusing them. Such as dragging a part string of say, ten 12V 38Ah along the metal racking by the battery cable on the end one, lifting the batteries into place by the cable, stuff like that.
Also, what the actual fuck?!?
Piss takers! If there's obviously parts missing, the description should say so, and if they are unsure, they should say so, and have pics.
tggzzz:
--- Quote from: Zucca on July 02, 2022, 01:32:00 am ---If you interconnect to the grid you are only allowed to put on the roof what can cover your own past power need.
Problem is, I am in the process to shut down the gas utilities and move everything on electric, that why I need to put more panels on my roof.
--- End quote ---
In the UK gas is much cheaper than electricity, and is commonly used for central heating, water heating, and cooking.
It sounds like you need to establish a new electricity consumption pattern in advance. In that case you will need to determine how long the power company require before they regard it as the consumption pattern. Local knowledge will be required.
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