New Google Classroom update makes it harder to cheat on quizzes | 25 Amp Circuit Breaker

On Wednesday, Flake voted against advancing controversial nominee Thomas Farr, a North Carolina lawyer who is up for a district court spot, during a Senate floor vote. And since then, Judiciary Chair Chuck Grassley canceled a committee meeting that would have included votes on more than 20 judicial nominees, apparently due to Flake’s key vote in committee.

Maybe what should be done is a special 240 outlet be developed and installed in all new construction (1 per garage). Something with safety features like thermal monitoring built into outlet. This would probably cost less than all those annoying ARC fault breakers I am required to have…

24v 12a is not that much more at 288watts. I’m sure I’m missing something to do with electromagnetism which makes the secondary unnatractive?

But at the end of the training it says “you can ignore all of this if you are troubleshooting”. If you are afraid of live circuits, stay at your desk where it is safe…

I recall a battery add from the 70’s or 80’s that displayed the power of a couple of 1.5V cells powering an electromagnet that could lift a car.

Although we bumped into each other on job sites, we had different employers. I knew his family and I wasn’t about to ask them about the details of course.

[It looks like I’m on meds with all my grammar and spelling errors in the post – and I am actually Pain meds and muscle relaxant for a evil frozen shoulder….]

Hey [Martin] I think you deserve some recognition for your contribution here tonight (or whatever time it is for you).

Thanks for the pointer, it looks promising! The RF-controlled remote switch appliances that can be found for a few dollars are self-contained, I would think that a Wifi-based one could also be? Having a separate wire coming out of the box seems like an extra hazard to me. If you keep the thing self-contained with only mains-in/mains-out, I would think it is safer in the end, and removes the internal complexity of optocouplers.

Many will ask what protects the circuit in an overload condition between the MCA and MOCP ratings? In these overload conditions, the overload protections on the motors themselves are designed to protect the circuit. If the overload protection on the compressor or fan motor fails, the windings in the motors have a far lower ampacity than the branch circuit and will fail open or shorted before the branch conductor will fail. In the case of any significant ground-fault short, the overcurrent protector (breaker or fuse) will still protect the circuit.

You won’t always have to group them together through the app, either. If a Sonos device is playing AirPlay 2 audio, you can just push and hold the play button on an older Sonos speaker to have it automatically pick up that same source.

If you run a separate earth wire that is hard grounded at the sub and hard grounded at your house and nowhere in between. In this situation if you get a lightning strike at or near your house then the ground potential rises. This flows through the earth wire to the sub ground and can be a massive current, enough to make the network fail dramatically. This rise in ground potential can also be caused by other things such as a faulty insulator on an MV or HV tower (pylon) or pole. Even if insulators are good then you can still get this ground potential rise. You can easily measure it with a length of wire and two earth spikes, put one near a tower and the other a distance away and you can see a significant voltage. If you also have a separate wire called neutral running form the sub then the potential between that wire and the earth wire is unknown so you have a risk of lethal voltage between neutral and earth, a situation that is not expected and potentially extremely dangerous.