Turn a wall outlet into a wireless charger with the Legrand Radiant | 25 Amp Circuit Breaker

Yeah, I screwed up this one. I was looking for the ON State voltage drop, but they were giving the power, which I multiplied by the current giving the wrong value above.http://www.nxp.com/documents/data_sheet/BT137-600E.pdf this shows about 3-6W @ 5A. I was trying to compare both relay and triac at 5A, significantly below their rated max load. It looks like the affirmation still stands, the triac will dissipate more, but now the number is not even double.

We must also remember that just because an item is unplugged and may also of not been plugged in for a few days it can still hold a big charge in the electrolytic capacitors. Back in the 80’s I used to work for a service department in the uk called Vallances. When working on tv’s with a crt I found that crt screens that had not been plugged in for a week or two could still hold a big charge and the first thing I did was to short the tube to discharge it. I also remember one of the older engineers working on an old valve radio which was unplugged at the time, suddenly there was a bang and a big cloud of smoke and a very stunned engineer. All I an guess is that an old electrolytic capacitor was shorted and exploded. So remember when something is unplugged it can still be very dangerous, more so with microwave capacitors.

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Thanks to its smaller body, and especially their reduced height due to the lack of a pentaprism or pentamirror assembly, the Sony A33 looks rather aggressive, with the popup flash housing hunched low over the top of the lens barrel. A soft, rubber pad surrounds most of the handgrip, and wraps around to the rear of the camera to cover a small, contoured thumb grip area as well.

Heat is a result of the friction of electron flow. Half the current at double the voltage should result in roughly half the heat if using the same size wire. It’s why our grid transmits at 100k volt over long distances.

Sega announced on its Twitter account today that the release of its Mega Drive Mini, a miniature version of its classic console, would be delayed until sometime in 2019. The Mega Drive Mini’s release was originally slated to coincide with the console’s 30th anniversary in Japan, but its global availability was unknown. Now, the company has confirmed that the miniature console will be released as the Mega Drive Mini in Japan and Europe and as the Genesis Mini in North America.

You have right, a isolated SMPS is used. The Microchip solution presented above will not work properly because of the ESP Module power requirements.

Before the code prohibited it, it was common practice to share neutrals between circuits. It was customary to pull three hot conductors – fed from three different phases on a three-phase system – a neutral and a ground into a single conduit in commercial facilities. The assumption was that the neutral carried only the unbalance between the three phases, and that would never exceed the highest current in a phase conductor. Now, you can’t do that anymore, unless you use a three-pole circuit breaker, handle ties, or a three pole disconnect switch.

I’d been “dead” 3 times at that point and thought I knew what it meant to be scared, seeing that tanker about to be filled, surrounded by thousands of litres of petrol, diesel, kerosene and other agents of flaming, painful death was and still is the scariest moment of my life. After that nearly being eaten alive by a feral pig or trapped under a hang glider under water was nothing

If you really have to work on a live circuit, electrically isolate yourself and try to work with only one hand. Put the other one in your pocket. That way the risk of closing a circuit through your body is much smaller. Also don’t work in a hurry, carefully plan your actions and slowly do them. Use nonflammable clothes. Use electrically protective gloves. Use face protection.

Of course, you’re still responsible for your work, but you don’t automatically forfeit your insurance just because you added an extra lamp and it caught on fire.

The QD terminals I buy are not the crappy ones you get at Home Depot. I buy 10 gauge Molex AviKrimp ones from DigiKey. They’re ~33 cents each at Q:250. They are no joke. I use them in the high current path of OpenEVSEs that I build for up to 24A, and they perform perfectly.