How To Wire A New Garage For Electric-Car Charging: What You Need To Know | Circuit Breaker Parts

Older light fixtures won’t necessarily work with energy-efficient CFL and LED bulbs. If you want to stay away from incandescent light bulbs, you might need to replace the whole fixture.

But I don’t like the mains powered heater in this case: If you take 120W @24V its just 5A. No problem for a switching transistor or wires with 0,5mm² and you keep the mains voltage in the PSU box. Which I prefer in this case. Mains rated cabling (230V here in Europe) are not thinner and need thicker insulation. In the worst case you have to have PE connection to any metal part of the construction.

Point taken. Perhaps it’s time to change of the the mindset, of the at large DIY community to when treated with properly 120/240 VAC can be used safely, as it’s being used day in and say out. I recall a project of Limor Fried made a project more as need be be becase she appered to be overly frearful of line voltage, then again she was taking into consideration the carelessness in the hacker community. One the flip side I personally know electrical engineers with decade in the filed who flippantly say 120 VAC can’t kill you. I know enough to know they are being full of shit In the end because of irritation fear useful resource is being ignored. Then again I have history of being comfortable with working on motor controls with neatly 800 VAC feeding them or working with electronic devices that have more than 30,0000 volts inside the cabinet. Lower voltages bring greater safy to life burt rquire higher current to do the amount of work, potetiall a fire hazrds id something goes wrong.

I had the same shock at 8 years old I put my finger in a lamp socket with no bulb, Living in UK I was treated to 240v. I have never had a mains shock since (thankfully). i have had lots of other shocks though mainly non discharged capacitor’s/

24v 12a is not that much more at 288watts. I’m sure I’m missing something to do with electromagnetism which makes the secondary unnatractive?

”Just like with laptops and mobile phones, sophisticated new features sometimes require new hardware,” Sonos said in its blog post today. “The computing platforms and software architecture in some of the older Sonos players simply don’t have the horsepower to support AirPlay 2. But by taking advantage of newer Sonos hardware, we’re able to make AirPlay 2 content available throughout the house on speakers old and new.”

Having a ground helps in the case of appliances with metal cases. If the hot wire comes loose and touches in inside of the metal case, it is shorted to ground which will trip a breaker. Otherwise the metal case would become hot which is obviously dangerous. Soil resistivity has nothing to do with it and in fact it would be safer if it wasn’t tied to physical ground, that is just done to save money.

This is an important enough point that I felt it deserved its own heading: High speed shooting isn’t just about sports photography; it’s about capturing the perfect moment, regardless of how fast the subject is moving. This is a point I’ve been making since I first tested a prototype of the Casio FH20 a couple of years ago: The difference between the perfect moment of blowing out the birthday candles and one that’s a near miss can be a small fraction of a second. When shooting candids of people chatting and interacting, facial expressions and mouth positions change in literally the blink of an eye. A camera that shoots at 7 frames per second vs. one that only manages 3 frames per second can mean the difference between dozens of "keepers" and just a few.

You can share neutrals among, say, receptacle circuits, if you make sure that there’s some kind of disconnecting means that opens all the conductors associated with all the circuits that share a neutral. That might be a multipole breaker, or it might be handle ties that physically tie breaker handles together, forcing all to trip if any trip.

The morals of the story: buy quality components and test them if possible; when in doubt, derate; and make sure a flaming component can’t light anything else on fire. And you’ll want to review the basics of fire protection while you’re at it.

I think in the long-term this shameful scam-fest won’t last. Because stuff will keep bursting into flames all around us, for one thing. But hopefully people will realise that Ebay’s “rating” nonsense is only valuable if the people who give the ratings actually know what they’re talking about. The whole point of counterfeit stuff is you mislead the customer so they don’t.

But at the end of the training it says “you can ignore all of this if you are troubleshooting”. If you are afraid of live circuits, stay at your desk where it is safe…