Motor Nameplate Current vs. NEC Full Load Current Values | National Electrical Code | Lrd12 Overload Relay

Earthing is thus a vital part of power distribution safety. The only snag with open equipment on your bench is that any earth connection becomes a valid part of the return circuit for the power, and since that earth connection can come through you, that’s dangerous. The isolating transformer breaks that earth circuit for your bench, thus removing that particular hazard. The upshot of this is that you can safely touch either one of the two wires and because there’s no path to ground, you won’t get zapped. (Touching two wires completes the circuit. You still have to be careful!) Isolation transformers are also used to lift the ground so that you can connect mains circuitry up to your oscilloscope, even though the black probe clip is connected to earth ground.

China needs to sort it’s shit out. Eventually, they might, then that’ll be OK. They may evolve the same way the West did til their business standards are reputable. Of course, that all happened to the West around the 19th and 20th Centuries. Since then, in the West, corruption has increased, and political bodies are bought and paid for by gigantic mega-corps, seeking monopolism and every other bent tactic they can try, for an eternally increasing share price.

Google’s Cloud AutoML has been available since January to let users train their own AI tools without any previous coding knowledge. The drag-and-drop tool lets anyone create an image recognition tool, which has a variety of use cases such as categorizing photos of ramen by the shops they came from. You can catch a glimpse of this process in the video above, in which different photos of Waldos are fed into the software.

Popular brands of EVSEs include ClipperCreek (one of the first companies to get into the home changing business), Siemens, JuiceBox, AeroVironment, and ChargePoint, among others. An online search can help you find a unit that comes with the features and power output that meets both your needs and budget. To make matters easier, you can purchase either of three popular ClipperCreek charging units directly from MyEV.com. Coming in both portable and hard-wired configurations, they’re priced between $379 and $565. Each of our EV for sale listings features them under a “shop for chargers” tab, or can check them out via this link.

If you can power the logic side with some +5V derived from mains, there is no point keeping the optocouplers, right? Of course, the ESP would need to be programmed when unplugged from mains A/C, but with OTA, it should be possible to control it all wirelessly once the initial firmware setup is done, even more so with LUA where telnet over wifi can be used once initial setup is done. So now, what kind of circuitry is needed to hash mains A/C to +5V DC (or even better, directly +3.3V)? What’s in a commercial USB adapter? Greg

It’s not easy to get that many amp-turns out of such a feeble source. You can wind arbitrarily many turns in a coil and create ridiculous magnetic fields, but the series resistance grows to the point that adding more turns decreases the current and diminishes the field.

▲ 系统工程：自动化系统开发设计、调试、低压配柜、变频器控制系统、PLC自动控制系统、各种节能成套系统。

I think a lot of the negativity is par for the course on Hackaday when dealing with HV (or other areas with safety concerns) projects. I got my share of the same thing with my “Quick 220 clone” project. Such projects should garner a healthy dose of paranoia, but I think where it goes wrong is when that converts into unfriendly skepticism – that somehow it’s impossible for an amateur working alone to build something that would pass muster with UL or CE.

厦门仲鑫达自动化设备有限公司是一家长年专业从事全球知名品牌ABB DSQC机器人系统模块备件及西门子摩尔（Siemens Moore APACS）控制系统零部件销售企业、我们售出的备品备件均提供一年的质量保证、并且都经过了严格的测试和认证。

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As explained elsewhere here, a major point of the Sony A33/55′s translucent mirror technology is to permit autofocus operation and image exposure to overlap each other, enabling very fast continuous burst shooting with accurate autofocus tracking. They in fact do a remarkable job of delivering 7fps or 10fps full-resolution shooting speeds, although in some respects, the experience is still rather different than shooting with high-end pro SLRs with that sort of burst capability. The heart of the difference has to do with what image the Sony A33 is showing you through the viewfinder at any given moment.

First rule of LO-TO: if you didn’t LO-TO it yourself it’s not! I will never EVER trust anyone to do a LOTO for me. If I’m to stick my hands into something dangerous the key to that lock on the switch is going to be in MY pocket!