drcampbell
Senior Member
- Location
- The Motor City, Michigan USA
- Occupation
- Registered Professional Engineer
Such is the basis for all superstition.
Pascal's wager - Wikipedia
en.m.wikipedia.org
Such is the basis for all superstition.
There's nothing common about Ohm's Law. Nobody's born knowing it; it must be taught.And common sense.
Thankfully so. A column is not a wall so the installation of receptacles should be a design issue not a code requirement.There was a PI this time to require a column to have a receptacle if the perimeter or circumference exceeded 24". It was rejected at the Task Group level.
Of course. Ohm's Law is a mathematical construct, as are Volts, Amperes, and Ohms; no one knows them intuitively.There's nothing common about Ohm's Law. Nobody's born knowing it; it must be taught.
There's nothing common about Ohm's Law. Nobody's born knowing it; it must be taught.
Dunning–Kruger effect - Wikipedia
en.m.wikipedia.org
I have encountered the exact same thing. I had never understood the potential mechanism for how that would happen. I brought it up with my dad once after a project where the foreman insisted that I build a wood stand for storing fork lift batteries, siting this issue. My dad explained it to me.I have often heard that automotive batteries should not be stored directly on a concrete floor, because concrete will suck the charge out of a lead-acid battery and deplete it.
Oh wow, CONFIRMED!Here's an explanation of that myth
The Truth About Storing a Battery on a Concrete Floor - ODYSSEY Battery
Perhaps you have heard the misconception that you should never store a battery directly on concrete to avoid damaging it.www.odysseybattery.com
You need to get the batteries with the built-in carrying strap!I still insist my kids put the boat batteries and wood boards for winter storage. Because it makes it easier for me to pick them up off the floor in the spring.
I learned about the hard rubber in high school electronics, it’s amazing how that keeps going but internal resistance causes discharge and the old rubber increased the rateHere's an explanation of that myth
The Truth About Storing a Battery on a Concrete Floor - ODYSSEY Battery
Perhaps you have heard the misconception that you should never store a battery directly on concrete to avoid damaging it.www.odysseybattery.com
I think I shed my coat and hat and belt always on a bed. The rest goes in the hamperFor many years I was involved in community theatre. To this day I will never toss a hat onto a bed or utter the word "MacBeth" in a theater building.
I expect Ohm’s law to be common knowledge for everybody who uses electricity.Ohm’s law should be common knowledge for a journeyman electrician. Maybe common sense was a poor choice of words on my part.
... and separators were made of wood.... WAY back in the 20s and 30s when he was growing up, car battery cases were made of hard natural rubber. ...
I expect Ohm’s law to be common knowledge for everybody who uses electricity.
My expectations have often been deemed unrealistic.
Ohm's law is one the first rules taught in basic electricity courses that involves any relationship between voltage and current and should be something any electrical professional would know though.There's nothing common about Ohm's Law. Nobody's born knowing it; it must be taught.
Dunning–Kruger effect - Wikipedia
en.m.wikipedia.org
Ohm's Law is taught literally on the first day of class in Circuits 101.Ohm's law is one the first rules taught in basic electricity courses that involves any relationship between voltage and current and should be something any electrical professional would know though.
Maybe even before introductions between student and instructorOhm's Law is taught literally on the first day of class in Circuits 101.
Some of the boat batteries that I had to help with at my uncles boat engine shop were a 2 person or mechanically assisted lift. They had to handle a few real monsters. On that sort of battery some manufacturers will not provide lifting handles but their use instructions would suggest the pre-installation of plastic covered metal lifting straps. I had been in the Sea Explorer program of the Boy Scouts and learned how cargo was handled in loading and unloading on ships with their own 2 boom derricks. I rigged up an imitation of that mechanism and changed the batteries out on a cradled 74 foot topsail ketch by myself. My uncle said "Nice job Tommy but don't ever do it again. If one of those batteries had gotten away from you the repairs to the deck would have cost me a fortune." I just hated the task of building a plank road for the fork lift to be able to reach the boats that were sitting in cradles with soft sand around them.You need to get the batteries with the built-in carrying strap!