How Intel’s 9th Gen chips show the way forward after Moore’s Law | 19mm Momentary Push Button

I think most people recommend having the PSU switched off at the wall. That way it should be pretty much safe, but there is still the other issue you mention.

Still, the orderly May backdrop registers as bullish, versus the prior three months, punctuated by the S&P 500’s flag pattern pinned to the steep early-month rally.

This 225 percent of motor load/branch circuit allowance for breaker sizing is to allow for motor starting without nuisance trips while still providing circuit protection against short circuit conditions.

I often say this, and I will say it again: just because a thing is often done poorly, foolishly or dangerously does not in and of itself preclude it from being done properly.

So a 20 amp breaker is designed to take the load shift on startup. A 15 amp breaker will carry the nominal load, but that surge on startup will kick it every time. In the days before switching supplies the input voltage would vary from 108 to 115VAC where I did work. This occasionally caused breaker trips on the unprepared circuit. I learned to spec high enough to minimize that issue and keep a safety factor in play.

All of these ratings can be found in NEC (NFPA 70) Table 310.15(B)(16) in detail, but as an example, according to this NEC chart, a 6-gauge copper circuit rated at 90°C (194°F) has an ampacity of 75 amps while a 6-gauge aluminum conductor rated at 60°C (140°F) has an ampacity of 40 amps. Of course, there are other considerations in addition to this, but it is clear the rules of thumb we often use can get us in trouble if we aren’t aware that exceptions exist and what those exceptions are.

Second was with an old (illegal) CB amp that I was converting to HF, and I touched an unshielded feed inductor of some sort, the aftermath from the RF burn was worse than that time I grabbed the wrong end of an iron with my fingers.

In line with its stated goal of setting class standards “for best in class comfort and driving engagement”, the Corolla is 4370mm long, 1790mm wide and 1435mm high, with a wheelbase of 2640mm. That makes it 40mm longer and 30mm wider than the outgoing Auris, and 25mm lower. The obvious rivals are the Ford Focus (8mm longer, 35mm wider, 19mm higher and with a 60mm greater wheelbase) and the VW Golf (115mm shorter, as wide, 17mm higher and 3mm smaller in wheelbase.

It’s a great idea but a shame it isn’t laid out correctly, The traces on the low voltage side of the opto-couple are too close to the mains voltage and also the trace from resistor R8 to the opto is too close as well.

I’ve been complaining for years about similar inabilities to do math with respect to diesel fuel. “Oh, but look at the high number I can calculate!” they all cry–as they pump their tanks with a fuel that’s 33% more expensive than gasoline.

I think that one of the statements that stuck with me the most while doing LV operations training was from a doctor who said “If you are admitted to my hospital with electrical burns then I will do my utmost to make sure that your family get here before you die”

If I remember right Edmund sold a one ton lift magnet that would work with one dry cell. It was about 3 to 4 inches in diameter and half as thick with a single piece of iron with a circular groove for the coil. I saw a similar magnet lift a car at the Museum of Science and Industry in Chicago decades ago. The trick is perfect flat coupling to a thick flat piece on the load.