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

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.

He did specifically mount/build that setup around the possibility of failure. He talks about it in the first few minutes of the video. Kinda a hyped up headline.

TRIACs have very low junction voltage / resistance especially when compared to the load they are driving. When they are overloaded they heat causing the the junction voltage to increase rapidly causing exponentially more power to be dissipated by the TRIAC instead of the load. This whole process seems to take about a nanosecond and ends with a small amount of the plastic casing still attached to the legs.

253V above. The 3% voltage reduction equalled 5% of the load and 6% voltage reduction 10% of the load I seem to remember. Over 15 years ago.

Rob, where would anyone ever get 10,000V from? Or even 1,000? Short of lightning strikes, these voltages don’t exist in the home, or in many factories. Why do those voltages matter?

Did your kitchen light stop working soon after the closet light? Did you change a light switch last month? Facts about recent electric changes in your home could lead me in the right direction, so it’s helpful if you can list them up front. (Don’t miss these 41 secrets home inspectors won’t tell you.)

If he ever turns his car on its side so that the car jack is pointed toward ceiling and plugged into the evse as shown, then I’d worry about it.

To be exact: It’s the anode or acceleration voltage. Focus is usually some kV, but derived from a 100Meg voltage divider.

*My* electricity is cheap (~$0.065/kW), so that 117 miles would cost about $7.61. Gas in my area is down to about $2.70/gallon, so the total fuel cost for those 253 miles would be about $16. Other areas of the country might be higher for electricity and lower for gas.

Electricity is complicated and dangerous. If you don’t know what you’re doing, you could start a fire or get electrocuted—sometimes fatally. Pretty much anything beyond plugging something into the wall should be left to a professional. The cost of my visit is nothing compared to the price of your safety. Here are 12 more home improvement projects you should never DIY.

For a more detailed explanation of how to match MOVs to applications, check out the “DC Application Varistor Design Guide.”

“Engineering types”? – I would suspect business or accounting “types” to be responsible for “saving” on maintenance. Engineers normally know, that maintenance is important.