How To Wire A New Garage For Electric-Car Charging: What You Need To Know | 25 Amp Circuit Breaker

It’s not voltage that kills you, it is current acoss the chest ie heart. Hence so called medical coils of the 19th century and high frequency tesla coils and drawing arcs to your skin that do not kill you. I knew a TV engineer that tested high voltage triplers for CRT TV’s by drawing an arc to his finger. The path is the issue and the current available.

Due to its diminutive stature, most photographers will find that the grip only accommodates two fingers, with the index finger resting on the shutter release button above, and the little finger curling beneath the bottom of the camera. This might seem a little crowded, but with the light, plastic-bodied 18-55mm kit lens, handling is nonetheless good, with the combination feeling extremely well balanced. Using larger, heavier lenses, the grip size is too tiring for single-handed shooting, so the photographer’s left hand will need to serve double duty, adjusting zoom or focus while simultaneously taking up the weight of the lens itself.

It may be just perception coloured by the general work environment, but a lot of the US regs seem driven by liability concerns. Too many lawyers.

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…

Wikipedia states most of mainland europe is on TN−S. “This arrangement is a current standard for most residential and industrial electric systems particularly in Europe”, if thats wrong, someone should fix it, preferably someone who has a authoritive position and can quote standards https://en.wikipedia.org/wiki/Earthing_system

You completely missed the point. The safety regulatory doesn’t change regardless of the *perception* or the *knowledge* of the person using it. If you are selling a product or publishing a design, you may ended up being liable for the end users. Even if you are the person that design and build your own stuff, plugging in something not certified pretty much voids your home insurance if it happens to be the cause of a fire etc. On the other hand if you are playing with ELV from UL etc approved/certified supplies, you are covered.

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Good call, light bulbs and heating elements don’t need perfect smooth precise 12vDC, as long as it’s in the ball park you’re good.

UL rule of thumb for shock hazard: 1.5mm / 60mils distance between a hazardous live conductor and something touchable for single insulation level protection (double that for double insulation).

Step 2:  To determine which MOV disc size to use, first identify the MOV series that minimally meet the 1000-A surge requirement. Inspecting the table above suggests a 20-mm MOV with a 31-V dc maximum continuous voltage rating (part number V20E25P) as a possible solution to meet the requirements.

If you have an older system, you might like to see more of a pool system rebuild. If you are interested in controlling the pool chemistry, we’ve seen that before, too.

Heat damage from increased resistance is pernicious. P = I^2 * R. At 24 amps, a resistance of a mere tenth of an ohm is 57 watts – almost twice as much as a pencil soldering iron! That’s why it’s important to get those crimps done right and inspect them frequently for signs of degradation. I will readily concede that I am not equal to a manufacturer in terms of consistency and reliability of crimps, even with a ratcheting tool. The only way I can make up for that is keeping an eye on things to catch early degenerative changes before things get out of hand. Part and parcel of building high powered electrical equipment by hand is being ever vigilant when using it.