Why do circuit breakers go up for on and down for off?

Reverse screws are used in traditional taps to lift the washer assembly off the seating to make it seem like you are unscrewing a traditional tap when the head of the tap is not actually moving upward.

Reverse screws are used on steering links so you can adjust the effective length by turning the link rod.

Reverse screws are used on quadcopter rotor shafts for two of the motors that are turning clockwise etc etc.

In short there are dozens of places you need a reverse screw,

The point is that they are not at the same voltage. ,

Oh it was enough to trip a 100mA whole house trip. If you plugged in near the short.

There are RCD that auto reset. Expensive, though.

It's a double whammie - not only has it been proven that the telephone style, rather than the computer style keypad is more accurate and faster for data entry, but also that for maximum efficiency (for the majority who are right handed), the numeric pad should be on the left, allowing the right hand to remain available for mouse movements and the occasional letter or punctuation key.

That last one is interesting. The other three match what I see here (Spain), the last I don't know. Could be.

Reminds me when I lost the diamond "needle" or pickup point of the record player in the cabin of a cinema theatre. I was going to examine it, and if fell to the floor. Gosh. I needed it to buy a new one.

I bent down and slowly examined the tiles and the cracks one by one, methodically. I found it. :-D

The thing was not mine, I was crestfallen to have lost it, so I still remember the incident.

...

A teacher of mine said "up is right, similar to the right wing being up" :-D

Many people have difficulty with that control. And the person that taught them to drive did not told them how to remember it, either.

(that teacher made to parliament or senate later)

I had an Opel Corsa with a similar design. Traditional stick, but with no mechanical latch. Electronic logic. But it could be moved soft or hard. Moving soft it did not latch. Move soft and release, blinked three times.

But the next Corsa has a traditional mechanical switch again.

You do not get electricity.

Oh!

I always wondered how those things could happen, I thought it was an urban legend. Of course, with transistor amplifiers like I built the chasis was ground, never "neutral".

Which is why repair shops were supposed to use isolation transformers.

I never use the keypad--not because I'm left-handed (which I am)--but because years ago I did data entry on a mainframe computer terminal that didn't have a numeric keypad. My touch-typing of the top-row numbers is effortless. I'm also well practiced at the location of the symbols because I'm a retired computer programmer.

I use the mouse right-handed because my first experience at using a mouse was at other people's desks and I was reluctant to move stuff around on someone else's turf. I'm pretty ambidextrous at most tasks, except for writing.

And sports cars with knock off hubs and wire wheels where a left hand thread is used on one side (forget which) so it doesn't some undone if the cap (or whatever) rubs against something.

And the pressure reducers used on LPG cylinders: propane is the opposite way to butane so you can't connect the wrong one.

I thought it might be useful to use the mouse with my left hand, leaving my right hand for typing, but gave up after a time.

Many, many radios had their chassis at neutral potential. They would generally have isolating cabinets and Bakelite knobs.

I also recall a radio with a dropper resistance wire in the mains lead. The unit was probably of a US origin given the wire colours, and it was an easy matter, through confusion, to swap live and neutral. Don't ask me how I know! That was probably my closest near death experience, and it was with 240V.

I'm unsure that is, or was, the case in Spain, because the plugs/sockets do not differentiate between live and neutral here. You can connect the plugs in any direction.

Would the radio get more noise if the live is connected to the chasis?

I would not put up with any false trips at all.

Not me, I have fuses. They blow if a wire exceeds it's capabilities. There's no other reason to stop power.

Yet you just admitted to having those namby pamby GFIs.

But you have 240V in the US too. And actually it's not nastier, as it makes you jump more. Apparently you're likely to stay touching the 120 for longer.

Exceedingly unlikely something would fall and the switch was off and you didn't want it turned on, all at the same time.

A light turning on is not the end of the world.

Houses plural? Oooh!