Had someone contact me because a browser interface was ādownā and it was actually a cert issue. It surprised me that in an IT context, this person didnāt have a basic understanding of SSL certs. They didnāt even know how to add a cert exception.
It got me thinking, what basic ubiquitous things am I a dumbass about outside of IT?
Ive seen lots of āfun factsā compilations, but it would be better to get a wide range of subject suggestions that I can spend 30 minutes each or less on, and become a more capable human.
Like what subjects would plumbers consider basic knowledge? Chemical interactions between cleaning products and PVC pipes?
What would an accountant or a landscaper consider to be so basic its shocking people can live their lives without knowing any of it?
For most areas of expertise, its difficult to know even what the basics are to start with.
Always use a one lead voltage meter tester when working on electricity. Donāt trust your breakers. Donāt trust light switches.
Are you talking about the meters that simply detect whether wires are still live or not? Definitely a good backup to double check that youāve shut off the right breaker.
If youāre talking about a single lead multimeter to measure voltage, Iāve never heard of such a thing and donāt know how that would even work.
This one can detect voltage with a single lead and also works as a voltage meter if you use two leads: https://www.benning.de/products-en/testing-measuring-and-safety-equipment/test-equipment-voltage-tester/voltage-tester-duspol.html
It also has an inbuilt motor to distinguish leaking voltage from continuous AC.
Sorry if I didnāt use the correct English terms and that wasnāt clear enough.
In Germany you simply call it a Duspol and every electrician knows what you mean. Didnāt research enough into the English description but it seems itās a two pole voltage tester with one pole voltage detection mode.
Thereās literally no such thing as a one-lead voltage meter. Voltage is, by definition, the difference in potential energy between two points.
Any tool that can give a voltage reading with one probe has a second probe youāre not considering, or is estimating voltage based on a some assumptions about current or some other factor being measured.
