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

[Max Demian]

On 04/03/2023 18:48, Rod Speed wrote:

On Sun, 05 Mar 2023 04:00:45 +1100, Max Demian <max_demian@bigfoot.com
wrote:

Whatever happened to the idea that to improve road safety steering
wheels should have a spike in the middle?

There never was any such idea unless you are expressing yourself very
badly.

Just because you haven\'t heard of an idea doesn\'t mean that it doesn\'t
exist.

--
Max Demian

 

[Max Demian]

On 05/03/2023 03:30, Commander Kinsey wrote:

On Fri, 24 Feb 2023 13:31:30 -0000, Max Demian <max_demian@bigfoot.com
wrote:

\"Licence\" is a funny word.

The law isn\'t funny it\'s a pest.

It means freedom. But when an activity is
\"licensed\" it means that you need special permission to do what you
could previously do anyway.

They don\'t understand the word \"endorsement\" either.  It actually means
to support something, yet they say the points on your driving license
are endorsements.  Bu they\'re disallowing you!  Get too many and they
take it away!

It also means, \"To write one\'s signature on the back of a cheque, or
other negotiable instrument, when transferring it to a third party, or
cashing it.\" So you are *approving* the payment.

Then that might be done with a rubber stamp if you are \"endorsing\" a lot
of cheques. Haven\'t you heard of \"endorsing ink\" used to recharge rubber
stamp pads?

When driving licences were little books with multiple pages, courts
would stamp details of speeding convictions on the pages. That was
called \"endorsing\" the licence. When you had more than three (I think)
endorsements you lost your licence for a period, equivalent to the
modern \"totting up\" of points. That\'s why the word \"endorsement\" is used
when you get points.

I don\'t suppose you remember the old style licences; they were little
hard bound books about 3\" x 2.25\". On the front page you stuck a licence
sticker which you got from the Post Office when you renewed it:
provisional licences lasted six months and full licences three years.

Then they introduced the \"paper\" licences in the mid 70s, initially
green ink on white paper.

--
Max Demian

 

[Max Demian]

On 05/03/2023 04:19, Commander Kinsey wrote:

On Sat, 25 Feb 2023 09:55:24 -0000, micky <NONONOmisc07@fmguy.com> wrote:
In alt.home.repair, on Sat, 25 Feb 2023 06:50:03 -0000, \"Commander
Kinsey\" <CK1@nospam.com> wrote:
On Sun, 19 Feb 2023 15:53:53 -0000, R D S <rsandr@yahoo.com> wrote:
On 11/02/2023 08:16, Commander Kinsey wrote:

Why do circuit breakers go up for on and down for off? Would they work
installed upside down?
I haven\'t read the replies....
So you can\'t turn them on by accident?

I can think of no time I\'ve accidentally fallen on a switch.

Do you want someone to explain what he meant?  I thought it was obvious.

Other than falling, how would down for on make it more likely to turn on
by accident?

I think we\'ve already decided that originally leaf switches were used,
which clearly /could/ fall.

--
Max Demian

 

[Anthony William Sloman]

On Sunday, March 5, 2023 at 4:06:54 AM UTC+11, John Larkin wrote:

On Sat, 04 Mar 2023 16:46:05 -0000, \"Commander Kinsey\" <C...@nospam.com> wrote:
On Sun, 19 Feb 2023 18:31:14 -0000, Scott Lurndal <sc...@slp53.sl.home> wrote:
Dan Purgert <d...@djph.net> writes:

Indeed. From Audel\'s volume 1:

\"Horse Power - This unit was introduced by James Watt to measure the
power of his steam engines; defined as 33,000 ft. lbs. per minute.\"
Audels Engineers and Mechanics Guide Vol 1. pg 78.

A farmer told me he had horses that could exceed that.

At least 10x short-term. A healthy human can peak over 1 HP.

James Watt did advertise the power of his steam engines in flattering terms..

A horse walking around a track doesn\'t get exposed to much fast moving air to evaporate the sweat it is generating.

Human cyclists can sustain about 1.3 HP if they are cycling fast outdoors because their air-speed is high enough to evaporate a lot of sweat.

They don\'t do as well on static exercise bicycles.

--
Bill Sloman, Sydney

 

[The Natural Philosopher]

On 04/03/2023 13:57, tony sayer wrote:

You will deserve what happens next.

Very unlikely for all those things to happen at once. I didn\'t get vaccinated
either,


I never wear a seatbelt,



I remember as a lad going to nick a few light bulbs from cars at Ron
Charlton\'s scrapyard. Whilst going about that we noticed the number of
cars that had very bent steering wheels, this i was told was because
the drivers having hit most anything their body flew forward and their
chest impacted the wheel and bent it, and no way could we bend it back.

Ron\'s old boy there said that most all the drivers in that sort of
impact didn\'t survive

I used to go motor racing, spectator only. I saw a man killed in front
ofme when he spun his vintage car and with no seat belts fitted was
able to jump out and sprint to the edge of the track. The car behind him
swerved and missed his car but killed him.
In front of his family.
I have seen cars in the most unbelievable crashed and the driver walk
away uninjured, but shaken, Because they had full roll cages and four
point harnesses.

Driving down the A10 towards Cambridge I saw some lights weave and flash
and end up off the road. A Rover 3500 with 4 lads in it was upside down
in a ditch., The front seat passengers crawled out and were OK, shaken,
but not injured. The rear seat passengers without seat belts were
covered in blood, and had I think a broken arm, and a dislocated collar
bone and multiple lacerations from being thrown against a lot of broken
glass and in fact contact with the ditch outside

The police said they were overtaking at an estimated 120mph and swerved
to avoid an oncoming car.

A mother was killed in another incident when she rammed a car in front
and her son, sitting behind her, without a seatbelt head butted her with
his forehead and smashed her skull.

Then came a seatbelt\'s and that became a thing of the past once people
started using them and we got round the stupidity of \"its better to be
thrown clear of the car you know\" idiocy.

Only case of that was not a car but a motorbike, which being thrown
clear of is somewhat of an advantage. Friend in Africa told me where the
scars came from \'I was going along fast and I came to a corner
unexpectedly, and there was a brick wall in front of me. I knew I
couldn\'t make it, and decided to go out in a burst of glory, so I opened
up the throttle. And my front wheel caught the kerb and catapulted me
over the wall into a thorn tree and the ground, which smashed my collar
bone, and put scratches down my face, but here I am...\'

I know someone who\'s an ex A&E consultant he\'ll give you chapter and
verse on car injuries;!...

Indeed. In a car accident the safest place to be is inside the passenger
compartment well strapped in. On a motorbike there is no passenger
compartment, just a lump of metal with sharp edges.

Motorcyclists wear leather skin guards and a bone dome, not seatbelts

You can omit a seat belt if you like, but I wont. Not ever. And wont
drive unless my passengers don\'t too. Not because it\'s a legal
requirement, but because I have seen what happens in a crash if you don\'t.


--
Ideas are more powerful than guns. We would not let our enemies have
guns, why should we let them have ideas?

Josef Stalin

 

[The Natural Philosopher]

On 04/03/2023 17:09, John Larkin wrote:

On Sat, 04 Mar 2023 16:48:12 -0000, \"Commander Kinsey\"
CK1@nospam.com> wrote:

On Thu, 23 Feb 2023 20:55:29 -0000, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:

On Thu, 23 Feb 2023 17:38:10 GMT, scott@slp53.sl.home (Scott Lurndal)
wrote:

John Larkin <jlarkin@highlandSNIPMEtechnology.com> writes:
On Tue, 21 Feb 2023 09:24:14 -0000, \"NY\" <me@privacy.invalid> wrote:

\"Commander Kinsey\" <CK1@nospam.com> wrote in message
newsp.10pblzyxmvhs6z@ryzen.home...
How annoying. The British fuses you could stick any in any socket, and
you could put any fusewire in each too. My house, I put in what I want.
Complete:
https://maintenance-service.co.uk/_webedit/cached-images/165-0-0-0-10000-10000-708.jpg
Without
fuses:https://flameport.com/electric_museum/old_equipment/white_wylex_reverse_switch_open.jpg
Without covers:https://i.ebayimg.com/images/g/qp4AAOSw3N9fNcsE/s-l300.jpg
(I have one like this, got it 2nd hand). It takes fuses or breakers, no
covers, just have to be careful inserting them. And no I never turn off
the whole bloody thing just to change one fuse.
Can\'t find a picture of the actual fuses seperate.

I was always surprised that all the fuse-wire holders in a UK fuse box were
interchangeable - there was nothing to stop you inserting a 15 A
lighting-circuit fuse in the slot for a 30 A ring-main. Everything would be
fine until someone turned on both a kettle and and electric fire on the same
ring main (thereby drawing more than 13A) and the 15 A fuse would blow.

It would have been better if the fuse holders had been designed to have
different size pins to avoid this. Of course there would still be nothing to
stop someone wiring 30 A wire into a 15 A holder, but that is (probably)
less likely than someone pulling out several fuses and then putting them
back in the wrong locations. At least the fuse holders and sockets in the
fuse box were colour-coded with domino spots which had to match.

The US screw type fuses, basically a light bulb socket, were
interchangable. Older houses around here still have them. One only
needs to keep a stock of 30 amp spares around.


There are two types of screw fuses, \"T\" and \"S\".

\"A type T fuse looks a lot like a lightbulb and screws into the
sockets of old fuse boxes. Conversely, the type S fuse requires
an adapter base to work with Edison type sockets. Type S fuses
are designed to be tamperproof. They help homeowners not
accidentally use the wrong fuse for their circuits.

A type S fuse has an adapter base with a unique size and thread
so you don\\u2019t mismatch the fuses. In other words, the size and
thread of the base prevent you from putting a 15-amp fuse in a 20-amp
circuit. However, a type T fuse will work with any Edison socket
irrespective of the amperage of the circuit. If your home has an
old fuse box that uses Edison sockets, talk to the technicians at
[company_name] about making the switch to socket adapters that use
S fuses. This can make your panel a lot safer.

I\'m an electrical engineer, so I can make my own judgements. I talk to
electricians and few if any actually understand basic electrical
principles. I have read the local electric codes but never met an
electrician who has.

Most houses around here have breakers now.

Completely unnecessary. All you need is the power to stop if something shorts so you don\'t set fire to your house.

Are circuit breakers completely unnecessary? What\'s to limit current
and wires getting hot inside walls?

Commander Wanker is just talking bollocks as usual.

\"All you need is the power to stop if something shorts so you don\'t set
fire to your house.\"

AKA a circuit breaker.

--
You can get much farther with a kind word and a gun than you can with a
kind word alone.

Al Capone

 

[Commander Kinsey]

On Tue, 21 Feb 2023 09:34:55 -0000, NY <me@privacy.invalid> wrote:

\"Commander Kinsey\" <CK1@nospam.com> wrote in message
newsp.10pebruymvhs6z@ryzen.home...

Electricity usually doesn\'t kill. It has to pass through your heart, and
you have to have a heart defect. I\'ve had seven 240V shocks right through
my torso, just made me jump. Not painful, not harmful.

I wouldn\'t describe a mains shock as \"not painful\". It definitely hurt: a
sharp throbbing while the current was flowing

What?! If you\'re that sensitive to pain, many things around the house must hurt you every day. Are you ginger by any chance?

I\'ve touched 240V AC across my hand. It just felt warm and tingly, I only knew it was an electric shock because of what I was touching.

> (until I managed to pull my hand away or the ELCB tripped)

Those things trip before you even feel it.

> and a tingling and dull ache for about an hour after.

I couldn\'t feel anything unusual when I let go.

I imagine different people are affected differently by the same voltage of
shock. I used to know a woman at university who could feel voltages of a few
volts through her fingers - she could touch the terminals of an AA battery
(eg between finger and thumb) and tell whether it was dead. She described 9
V from a PP9 battery as \"uncomfortable\".

Maybe sweaty hands? Try doing the same with your hands soaking wet.

I\'ve only ever had AC shocks - a couple of mains shocks between fingers or
between different parts of the same finger knuckle - and those pulsate
because of the AC. I\'m not sure what an equivalent DC shock feels like - and
I\'m in no hurry to find out ;-)

Try an electric fence, those are fun. When a teenager, I demonstrated a circuit must be completed. My friend touched the electric fence and said it was off. I touched the fence with one hand and the ground with the other, my arms did a mexican wave. No pain, all I felt was my muscles operating without my command.

The worst shock was from terminals of a
transformer in a valve-powered tape recorder and that was about 400 V AC -
probably from the input that fed the HT for the valves - which \"killed\" my
arm for a while and caused me to gash my hand on a sharp bit of solder on
the circuit board as I pulled my hand away. Strangely, getting that shock
fixed a problem with the tape recorder: I can only assume that there was a
bad connection which was fixed when I jolted the circuit board.

Or you cheered up the tape recorder by giving it amusement.

 

[Commander Kinsey]

On Tue, 21 Feb 2023 20:40:28 -0000, rbowman <bowman@montana.com> wrote:

On Tue, 21 Feb 2023 09:34:55 -0000, NY wrote:


I imagine different people are affected differently by the same voltage
of shock. I used to know a woman at university who could feel voltages
of a few volts through her fingers - she could touch the terminals of an
AA battery (eg between finger and thumb) and tell whether it was dead.
She described 9 V from a PP9 battery as \"uncomfortable\".

9V batteries are a bit uncomfortable if you place your tongue across the
contacts but you can quickly tell the good from the ones that are fading
fast.

Ask a woman to insert one.

 

[Commander Kinsey]

On Tue, 21 Feb 2023 21:21:42 -0000, NY <me@privacy.invalid> wrote:

\"rbowman\" <bowman@montana.com> wrote in message
news:k5kohsF3q0lU2@mid.individual.net...
On Tue, 21 Feb 2023 09:34:55 -0000, NY wrote:


I imagine different people are affected differently by the same voltage
of shock. I used to know a woman at university who could feel voltages
of a few volts through her fingers - she could touch the terminals of an
AA battery (eg between finger and thumb) and tell whether it was dead.
She described 9 V from a PP9 battery as \"uncomfortable\".

9V batteries are a bit uncomfortable if you place your tongue across the
contacts but you can quickly tell the good from the ones that are fading
fast.

I never tried it with the 1.5V cells, not having a tongue like an
anteater.

I nearly said that the \"tongue test\" works for batteries, but then tongues
are a lot more sensitive than fingers (oo, Matron\"). In lieu of an
anteater\'s tongue, a little bit of wire shows that the tongue can also
detect 1.5 V. Done it also with those flat 4.5 batteries with two springy
brass terminals, as used in torches in the past.

I wonder how sensitive your eye is?

 

[Peeler]

On Sun, 5 Mar 2023 10:59:12 +0000, Max Dumbian, the REAL dumb, notorious,
troll-feeding senile idiot, blathered again:

> It also means,

It only means that you are squeezing yet so much more senile shit out of
your senile head that keeps fomenting with your senile shit, troll-feeding
senile shithead!

<FLUSH another huge load of your usual senile shit>

--
Max Dumb having another senile moment:
\"It\'s the consistency of the shit that counts. Sometimes I don\'t need to
wipe, but I have to do so to tell. Also humans have buttocks to get
smeared due to our bipedalism.\"
Message-ID: <6vydnWiYDoV1VUrDnZ2dnUU78QednZ2d@brightview.co.uk>

 

[Peeler]

On Sun, 5 Mar 2023 11:03:16 +0000, Max Dumbian, the REAL dumb, notorious,
troll-feeding senile idiot, blathered again:

Other than falling, how would down for on make it more likely to turn on
by accident?

I think we\'ve already decided that originally leaf switches were used,
which clearly /could/ fall.

I think that we\'ve already established that HE is a proven clinically insane
trolling attention whore and YOU a demented senile troll-feeding asshole!

--
Max Dumb having another senile moment:
\"It\'s the consistency of the shit that counts. Sometimes I don\'t need to
wipe, but I have to do so to tell. Also humans have buttocks to get
smeared due to our bipedalism.\"
Message-ID: <6vydnWiYDoV1VUrDnZ2dnUU78QednZ2d@brightview.co.uk>

 

[John Larkin]

On Sun, 5 Mar 2023 10:43:47 +0000, Max Demian <max_demian@bigfoot.com>
wrote:

On 04/03/2023 18:48, Rod Speed wrote:
On Sun, 05 Mar 2023 04:00:45 +1100, Max Demian <max_demian@bigfoot.com
wrote:

Whatever happened to the idea that to improve road safety steering
wheels should have a spike in the middle?

There never was any such idea unless you are expressing yourself very
badly.

Just because you haven\'t heard of an idea doesn\'t mean that it doesn\'t
exist.

And just bcause it doesn\'t exist doesn\'t mean you can\'t invent it.

 

[John Larkin]

On Sun, 5 Mar 2023 13:13:55 +0000, The Natural Philosopher
<tnp@invalid.invalid> wrote:

On 04/03/2023 17:09, John Larkin wrote:
On Sat, 04 Mar 2023 16:48:12 -0000, \"Commander Kinsey\"
CK1@nospam.com> wrote:

On Thu, 23 Feb 2023 20:55:29 -0000, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:

On Thu, 23 Feb 2023 17:38:10 GMT, scott@slp53.sl.home (Scott Lurndal)
wrote:

John Larkin <jlarkin@highlandSNIPMEtechnology.com> writes:
On Tue, 21 Feb 2023 09:24:14 -0000, \"NY\" <me@privacy.invalid> wrote:

\"Commander Kinsey\" <CK1@nospam.com> wrote in message
newsp.10pblzyxmvhs6z@ryzen.home...
How annoying. The British fuses you could stick any in any socket, and
you could put any fusewire in each too. My house, I put in what I want.
Complete:
https://maintenance-service.co.uk/_webedit/cached-images/165-0-0-0-10000-10000-708.jpg
Without
fuses:https://flameport.com/electric_museum/old_equipment/white_wylex_reverse_switch_open.jpg
Without covers:https://i.ebayimg.com/images/g/qp4AAOSw3N9fNcsE/s-l300.jpg
(I have one like this, got it 2nd hand). It takes fuses or breakers, no
covers, just have to be careful inserting them. And no I never turn off
the whole bloody thing just to change one fuse.
Can\'t find a picture of the actual fuses seperate.

I was always surprised that all the fuse-wire holders in a UK fuse box were
interchangeable - there was nothing to stop you inserting a 15 A
lighting-circuit fuse in the slot for a 30 A ring-main. Everything would be
fine until someone turned on both a kettle and and electric fire on the same
ring main (thereby drawing more than 13A) and the 15 A fuse would blow.

It would have been better if the fuse holders had been designed to have
different size pins to avoid this. Of course there would still be nothing to
stop someone wiring 30 A wire into a 15 A holder, but that is (probably)
less likely than someone pulling out several fuses and then putting them
back in the wrong locations. At least the fuse holders and sockets in the
fuse box were colour-coded with domino spots which had to match.

The US screw type fuses, basically a light bulb socket, were
interchangable. Older houses around here still have them. One only
needs to keep a stock of 30 amp spares around.


There are two types of screw fuses, \"T\" and \"S\".

\"A type T fuse looks a lot like a lightbulb and screws into the
sockets of old fuse boxes. Conversely, the type S fuse requires
an adapter base to work with Edison type sockets. Type S fuses
are designed to be tamperproof. They help homeowners not
accidentally use the wrong fuse for their circuits.

A type S fuse has an adapter base with a unique size and thread
so you don\\u2019t mismatch the fuses. In other words, the size and
thread of the base prevent you from putting a 15-amp fuse in a 20-amp
circuit. However, a type T fuse will work with any Edison socket
irrespective of the amperage of the circuit. If your home has an
old fuse box that uses Edison sockets, talk to the technicians at
[company_name] about making the switch to socket adapters that use
S fuses. This can make your panel a lot safer.

I\'m an electrical engineer, so I can make my own judgements. I talk to
electricians and few if any actually understand basic electrical
principles. I have read the local electric codes but never met an
electrician who has.

Most houses around here have breakers now.

Completely unnecessary. All you need is the power to stop if something shorts so you don\'t set fire to your house.

Are circuit breakers completely unnecessary? What\'s to limit current
and wires getting hot inside walls?


Commander Wanker is just talking bollocks as usual.

\"All you need is the power to stop if something shorts so you don\'t set
fire to your house.\"

AKA a circuit breaker.

A curent limiter would be interesting. There might be objections
relative to safety.

Utilities have self-retry breakers.

 

[Rod Speed]

On Sun, 05 Mar 2023 21:43:47 +1100, Max Demian <max_demian@bigfoot.com>
wrote:

On 04/03/2023 18:48, Rod Speed wrote:
On Sun, 05 Mar 2023 04:00:45 +1100, Max Demian <max_demian@bigfoot.com
wrote:

Whatever happened to the idea that to improve road safety steering
wheels should have a spike in the middle?
There never was any such idea unless you are expressing yourself very
badly.

Just because you haven\'t heard of an idea doesn\'t mean that it doesn\'t
exist.

Just because you claim it existed doesn\'t mean that it ever did.

 

[Peeler]

On Mon, 06 Mar 2023 04:18:03 +1100, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:

<FLUSH the abnormal trolling senile cretin\'s latest trollshit unread>

--
Richard addressing senile Rodent Speed:
\"Shit you\'re thick/pathetic excuse for a troll.\"
MID: <ogoa38$pul$1@news.mixmin.net>

 

[Bob F]

On 3/5/2023 2:43 AM, Max Demian wrote:

On 04/03/2023 18:48, Rod Speed wrote:
On Sun, 05 Mar 2023 04:00:45 +1100, Max Demian
max_demian@bigfoot.com> wrote:

Whatever happened to the idea that to improve road safety steering
wheels should have a spike in the middle?

There never was any such idea unless you are expressing yourself very
badly.

Just because you haven\'t heard of an idea doesn\'t mean that it doesn\'t
exist.

OK. You are into idiotic ideas. We get it.

 

[Commander Kinsey]

On Tue, 21 Feb 2023 21:33:42 -0000, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:

On Tue, 21 Feb 2023 21:21:42 -0000, \"NY\" <me@privacy.invalid> wrote:

\"rbowman\" <bowman@montana.com> wrote in message
news:k5kohsF3q0lU2@mid.individual.net...
On Tue, 21 Feb 2023 09:34:55 -0000, NY wrote:


I imagine different people are affected differently by the same voltage
of shock. I used to know a woman at university who could feel voltages
of a few volts through her fingers - she could touch the terminals of an
AA battery (eg between finger and thumb) and tell whether it was dead.
She described 9 V from a PP9 battery as \"uncomfortable\".

9V batteries are a bit uncomfortable if you place your tongue across the
contacts but you can quickly tell the good from the ones that are fading
fast.

I never tried it with the 1.5V cells, not having a tongue like an
anteater.

I nearly said that the \"tongue test\" works for batteries, but then tongues
are a lot more sensitive than fingers (oo, Matron\"). In lieu of an
anteater\'s tongue, a little bit of wire shows that the tongue can also
detect 1.5 V. Done it also with those flat 4.5 batteries with two springy
brass terminals, as used in torches in the past.

https://www.youtube.com/watch?v=8ve23i5K334

Premeeeeer? Stooodent? Of course they have difficulty with a lightbulb.

 

[Commander Kinsey]

On Wed, 22 Feb 2023 09:23:56 -0000, NY <me@privacy.invalid> wrote:

\"rbowman\" <bowman@montana.com> wrote in message
news:k5lj6qF71laU6@mid.individual.net...
On Tue, 21 Feb 2023 22:46:13 +0100, Carlos E. R. wrote:


https://www.youtube.com/watch?v=8ve23i5K334


It must be a fake!

I had a friend with a PhD in electronics who might have had a problem with
it. A full circuit analysis taking into account the internal resistance of
the battery and so forth would be easy.

He wasn\'t quiet that bad although he lived in his head and not the
physical world. One day he demonstrated why you shouldn\'t put a random
piece of wire across the terminals of a car battery to see if it is dead.
Spoiler: it wasn\'t.

Nasty. A teacher at my school, 40 years ago, had a blotchy face and bald
patches in his hair. He told us that he\'d been working on his car some years
before and a spanner slipped and shorted across the battery terminals. The
battery exploded, showering him with acid. Luckily he wore glasses which
shielded his eyes from getting acid in them. Nowadays car batteries have a
plastic shroud around the terminals to make it very difficult for a spanner
etc to touch both terminals (or the +ve and a grounded part of the car) at
the same time.

I\'ve never seen a battery like that, and I have a brand new battery in my car. Perhaps you meant as part of the car connectors?

 

[Commander Kinsey]

On Wed, 22 Feb 2023 14:48:36 -0000, rbowman <bowman@montana.com> wrote:

On Wed, 22 Feb 2023 09:23:56 -0000, NY wrote:


Nasty. A teacher at my school, 40 years ago, had a blotchy face and bald
patches in his hair. He told us that he\'d been working on his car some
years before and a spanner slipped and shorted across the battery
terminals. The battery exploded, showering him with acid.


Like many companies we sometimes had summer employees that happened to be
related to someone up the hierarchy. One managed to explode the battery on
a forklift trying to jump start it. Fortunately he wasn\'t injured.
Returning a vice president\'s favorite son worse for the wear isn\'t a good
career move.

What did he do, jump start it from the mains?

 

[Commander Kinsey]

On Wed, 22 Feb 2023 04:15:23 -0000, rbowman <bowman@montana.com> wrote:

On Tue, 21 Feb 2023 22:46:13 +0100, Carlos E. R. wrote:


https://www.youtube.com/watch?v=8ve23i5K334


It must be a fake!

I had a friend with a PhD in electronics who might have had a problem with
it. A full circuit analysis taking into account the internal resistance of
the battery and so forth would be easy.

He wasn\'t quiet that bad although he lived in his head and not the
physical world. One day he demonstrated why you shouldn\'t put a random
piece of wire across the terminals of a car battery to see if it is dead.
Spoiler: it wasn\'t.

A thin wire would be fine, as long as you don\'t need the wire again.