At least in the US/Canada/Japan, when you buy an appliance, it comes with a standard (NEMA5 or NEMA1) plug. In Europe and Africa (at least up to a decade or two ago) we often needed to purchase a *plug* every time we bought a device, and play amateur electrician and wire it ourselves (is this still the case?). I’m convinced this is a big reason the horrible standard IEC power entry connector and locale-specific cord even exist.
“If you can power the logic side with some +5V derived from mains, there is no point keeping the optocouplers, right?”
The Residual Current Circuit Breaker is a tad expensive, and is probably overkill for most hobbyists. A Ground Fault Circuit Interrupter outlet, (GFCI), is cheaper to buy, cheaper to have installed, and a *knowledgeable* do-it-yourselfer can install his or her own. If you are knowledgeable about electrical wiring and codes, but don’t want to change an outlet in your house, you can buy a GFCI outlet and some regular outlets and make your own ground-fault-protected power bar, as a correctly wired GFCI outlet can protect additional regular (cheap) outlets as well. Alternatively, I’ve also seen GFCI units that plug in overtop of regular outlets and add protection to them.
It’s the peak rating. For constant loads, or anything that could be temporarily constant you need to de-rate.
After which he had an excuse to take the afternoon off and he repaired to the pub for “a feed” of Guinness!
Still, most capitalists, when you order something, don’t ask “what do you want it for?”, so they can substitute something else without telling you. Generally in contracting with capitalists, mysterious “problems” don’t regularly as clockwork pop up, increasing the cost above what was agreed.
It’s an ultimatum that hits at Republicans’ narrow margins in the Senate (which will be wider when the new Congress starts in January).
Far as I’m aware, you’re supposed to get a qualified person to fit an electric cooker. Of course, doesn’t stop me doing it. Actually more complicated than you think, it’s not just 3 terminals, there’s a dozen bits of plastic and metal in there that all need putting back in the right order.
“Normal” mains voltage heating elements use nichrome (nickel chromium) some time called “resistance wire” because it has a higher resistance for a given surface area.
Don’t call at the end of the day if you want same-day service. After 4:30 or 5:30 p.m., I need to pay my workers overtime, so I’ll charge you more to make up for it. Calling first thing in the morning lets me fit your job into my day—and you’ll see a lower bill.
Quite often, when I was in the Air Force as a Cable Dawg, I would get zapped while doing copper cable cut splices for mission critical systems. Meaning they were left powered and came back on one by one as they were spliced. -48v DC is very tingly when it runs through a crimper and into your arm…
This certainly looks like one of the more impressive ARM-powered Windows 10 laptops we’ve seen so far. The first few devices ran on the same Snapdragon 835 chip found in Android smartphones from last year, and they showed early promise with some issues that still needed work.
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