Microsoft announces Xbox One keyboard and mouse support with Razer partnership | 25 Amp Circuit Breaker

I know this goes against what many of you have been told and understood your entire career, but take a deep breath and read on.

Where I do agree that it is under rated, as far as I know, Mathias is an electrical engineer. So he should be able to work with mains, and he should also know better.

FYI: The bare minimum requirement is AWG #20 wires for chassis wiring 11A which is what’s needed for 100W at 12V. I wouldn’t exactly call that a thick wire. While you can get away with using thinner wires fopr the AC heater, but you’ll need the wire to be able to carry the current defined by your fuse and have thick enough insulation for the voltage rating. So at the end of the day, the overall diameter for the AC heater still ended up being thicker.

But at the same time, if one wants a high efficiency power supply, then the manufacturer typically have placed in a rectifier that is technically over specified for the job, as these devices are generally not that expensive, and are an easy way to cut down a few watts overall without adding any substantial extra cost.

If you do not know the exact value of each cost, you could enter an estimated percentage based on the cost of goods.

So it’s the usual forgettable Toyota – but still hugely preferable to the godawful Prius which is a truly horrendous looking vehicle 

Australia is similar, except 3ph is uncommon in a house. There’s 3 phase at the kerb and each house is connected to one phase.

Both elements weren’t on….elements in electric HW heaters are cascading…they cannot come on simultaneously. Bottom element is powered through normally closed side of upper element relay. Therefore, if upper element is on, lower element is off.

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.

While no standard is perfect, I have found that knowing the NEC and looking carefully at manufacturer listings and labels can save you time, your customers money, and help keep everyone safe.   

It’s a 750W pump. Since it is running on 220V, steady current would be ~3.5A, so inrush current could be as high as 20A, according to some sites I’ve just found. Doesn’t sound awesome.

You are correct and if you design this type of solution you already know this. With PCB design, the alternatives are heavier copper, wider traces, plating up copper in the areas that carry heavy current or a combo of any of the three. But you can only go so far with these solutions. Hack apart a known good SSR and I bet they use the exact same solution.