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I find it fascinating how the difference has also impacted the very different “styles” of electrical standards, construction, equipment, etc…the US has had to worry about thermal issues in different ways because of the lower voltage, but that also extended to higher voltage equipment as well, and an overall concern regarding fire (particularly in non-residential installations) when at the same time, we had a lot more natural resources piled around so in the US, we focus heavily on metallic enclosure and grounding (and the fact that our neutrals are meaningful when most Euro outlets are non-polar). At the same time, engineers were far more plentiful (and far less expensive) in postwar Europe than in the US, and the electrician:engineer ratio was very different. Likewise, that’s why NEMA and IEC in many ways are so different (NEMA is overbuilt, maintainable, easily specified but expensive and not particularly precise in application, meant for an electrician to be able to come up with the right contactor, etc.) whereas IEC stuff is more resource- and space-efficient but requires specification. Double-insulation is instead the focus in Europe, which doesn’t need any more metal to accomplish.

Oh, and I have fixed about 15,000 of the old CRT TV’s so while my mistakes can’t ever be called good, they’re not without precedent.

If you hesitate at the thought of doing this math for every system you work on, the NEC Article 110.3(B) states: Listed or labeled equipment shall be installed and used in accordance with any instructions included in the listing or labeling.

The owners manual for the Clipper Creek unit shown in the picture specifically says not to wrap the cord tightly like shown in the picture. If you do the cord WILL get hot internally even when properly wired during a long charge. It needs that open space to vent heat. The cord will stay cool if coiled properly. Whenever people not knowing otherwise coil the public chargers like that I will loosen them up.

Styling of the Niro is barely distinguishable from the standard car, save the door covering the charge port and subtle teal accents inside and out that indicate to the outside world that this is slightly more eco than everything else. And those eco signifiers tend to be either green or blue, so why not blend them into Nineties-Fantastic Teal?

Alternatively, the stillborn 42V automotive power standard is another solution. http://en.wikipedia.org/wiki/42-volt_electrical_system

Everything else on the datasheet are useless observations only true under test conditions. A few really awesome datasheets give junction to ambient, which is a blessing if you don’t need a heatsink.

I seem to remember one test video I saw online, possibly BigClive, finding that the actual rating on the faux-Fotek SSR that he was dissecting was rated at around 10A, in a 25A labeled SSR. I believe it was also a MOSFET instead of the SCR or TRIAC that it was supposed to have, as well.

We, uh, we don’t have sauna heaters down here. We have air conditioners In semi-related news, it was forecast to be 40C today…

Interestingly, I didn’t notice the unusual size of Sony A33′s viewfinder display when I first picked up the camera, but I became acutely aware of its loss when I switched back to a conventional sub-frame DSLR after having shot with the Sony A55 and A33 for a day or so. The conventional DSLR suddenly felt I was looking down a tunnel, and I also found myself greatly missing the richness of the A33′s viewfinder information overlays. The excellent image quality of the Sony A33′s EVF did a lot to win me over to the idea of EVFs on interchangeable-lens cameras, but it was the combination of image size and informational richness that really put me over the top. Because it could appear right there in the viewfinder, rather than on the rear-panel LCD, I was surprised to see how much I came to rely on the electronic level display for keeping my landscape shots straight when there was no obvious horizon line.

For instance, when I test a car that specifically touts efficiency, I always plan a relatively rigorous regimen of fuel economy measurements, including filling and refilling the tank at the same pump, and maintaining a consistent driving style. But then a school bus is late and I have to rush to the office, keeping me from the fuel pump before the car goes away — and keeping my foot to the floor a bit more than ideal. Or a charging plug falls out of the wall socket you’ve been meaning to replace for a decade.

Five vs Ten amps is a big difference in heating in the power factor correction circuit of his power supply. If you find a data sheet for similar power supplies, they are always 1-3% more efficient on 220Vac and run cooler because of it.