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

Feb 11, 2023 Last reply: 2 years ago 1781 Replies

I wonder how sensitive your eye is?

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

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

Utilities have self-retry breakers.

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

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

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?

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

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

And you weren't holding the wire...

Possibly hooked it up backwards; we weren't sure. The forklift was an older gasoline powered model that tended to mark its territory. He was lucky the whole thing didn't go up in a ball of fire.

There was a freak accident at the Lime Rock sports car track. The driver was strapped in with the regulation three point harness but had the bad luck up ending up upside down on a large anthill. Can't win them all.

The first iteration of seat belts in the US were two point lap belts. They may not have prevented smashing your brains out on the dash but at least they kept you on the correct side of the car in the days of vinyl covered bench seats. My wife knew things were going to get interesting when I advised her to buckle her belt. While I liked her and everything I preferred not having her sitting in my lap at an inopportune moment.

Absolutely. A new design should start with maximal confusion and deliberate silliness. Mere impossibility is no reason to avoid ideas.

Math and discipine can come later, when the new idea is implemented.

Not many engineers are comfortable doing both, being goofy and being careful.

That explains it. In the US and endorsement is a positive thing. For example my license has a motorcycle endorsement. When I had a CDL it had hazardous materials, double/triples, and tanker endorsements.

Do you have to wrap URLs?

By the way my old NiCads were detectable with the tongue. The paper (!) insulation had come off, hence the negative chassis was exposed right next to the positive. You could lick both. Trouble is, when I put 10 of them in a bag to go on holiday, some shorting occurred.

Best thing for a car is an amp clamp, those things are pure dead magic so they are.

What a strange place to keep batteries. I've heard of putting them on the radiator to give them a boost, but cooling them?

It cycles whatever I set it to. I set a min and max as close as 0.1C apart.

It won't be completely silent. Mine is between cycles.

Mind you in summer it's just on full blast all day. You can't be anywhere very hot if 800W is enough.

A large capacitor designed for 12V connected to the output of a microwave transformer. Sometimes you'd get an explosion, sometimes it'd go up in the air like a firework. But you could be guaranteed of a neighbour moaning about it.

Best to buy 100 fireworks and make them into one firework.

Why wouldn't you care? We only have to avoid touching one of them. And you can also use the other to ground the chassis.

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required