Hi,
I was wondering how much is the dangerous quotas for Volts, Amperes and Watts for a human being and what are the different damages of different levels and also how about the UV-C light.
Thx
Have you googled it?
Seriously!!, Is this the kind of thing you ask in "Arduino Forum"?
https://www.physics.ohio-state.edu/~p616/safety/fatal_current.html
and when we're considering the resistance of the body for what I know is varying, but how much?
BorislavLukanov:
and when we're considering the resistance of the body for what I know is varying, but how much?
it was there in the article, you should have looked at it thoroughly.
"The actual resistance of the body varies depending upon the points of contact and the skin condition (moist or dry). Between the ears, for example, the internal resistance (less the skin resistance) is only 100 ohms, while from hand to foot is closer to 500 ohms. The skin resistance may vary from 1000 ohms for wet skin to over 500,000 ohms for dry skin."
yep. I saw it, thx, but I'm steel not 100% shure on how confident I can be on the information provided from the article in the site in consideration and I prefer not testing it hehe
also we are talking about 1000~500000 ohms on entry point of the skin + 100ohms internal resistance of the body fluids/tissues etc. so 1000+1000+100=~2100ohms total resistance to use for calculating or the parameter of 1000~500,000 ohms resistance of the skin is considerate to be total?
Use a multimeter to measure your own skin resistance. It is completely safe to do so.
how about the UV-C?
[u]OSHA[/u] considers anything above 50V to be dangerous to touch (and I believe UL uses the same standard).
If you are selling a product, anything above 50V has to be insulated/isolated.
Since current isn't mentioned and resistance varies all over the place, I assume that's allowing for worst-case with wet skin and a large contact area.
...Phantom power for studio microphones is 48VDC and you can easily-accidently touch the connections on a male XLR connector. That's considered safe and "sold everywhere".
I don't know anything about UV.
I saw it, thx, but I'm steel not 100% shure on how confident I can be on the information provided from the article in the site in consideration and I prefer not testing it hehe
You're right. Better ask an Arduino forum.
how about the UV-C?
Very bad for you.
I doubt its considered perfectly safe, its considered an acceptable risk for specialist equipment, and it is current
limited.
Put that on your tongue and it would be extremely painful, 9V is plenty bad enough. For a childs toy strictly
standard apply...
BorislavLukanov:
how about the UV-C?
MarkT:
Put that on your tongue and it would be extremely painful, 9V is plenty bad enough. For a childs toy strictly
I learned that the hard way. 
80mA at 230V will kill you. 10mA at 230V and you will feel a tingle. 30mA at 230V and you will get a shock and muscle spasm.
We use 30mA RCD's in Domestic wiring here in the UK
BorislavLukanov:
I was wondering how much is the dangerous quotas .......... also how about the UV-C light.
There must be plenty of more appropriate forums to ask that particular question.
Try asking in a Gardening forum or maybe your local travel agent.
I want to put an UV-C lamp to be on when nobody is in the room, but I don't know how much power must be to be efficient. On e-bay can be found some of 55W UV-C lamps than can be used with some sensor or a simple code to tur on when the room is empty also I though to put one in the wardrobe hoping that will not damage the clothes instead of the bacteria's : D
Generally speaking, DC current is more deadly than AC current. This fact was proven during the first electric chair execution here in the United States. Gruesome story. One of Edison's biggest blunders.
Having said that, 25 mA going across the heart Can kill you. However, as mentioned earlier, the voltage needed depends on your physical size and condition. A voltage that might not bother you, can kill a child. A child toy should be less than 25 V, Less for baby toys.
as far as UV light goes, there are several different grades of UV light. Some are not dangerous. Others can blind you. you need to be more specific about what you're doing for anyone to answer you with any credible information.
promacjoe:
One of Edison's biggest blunders.
Edison also did DC electric power transmission systems before his company merged with Thomson-Houston company and became General Electric. 
Generally speaking, DC current is more deadly than AC current
No. The other way around. I have solar panels on my roof. The voltage is 500 V DC. The guys who installed them said that they have a few times had a 500 V shock. It feels very nasty but is not particularly dangerous. A 240 V AC shock on the other hand kills you.
AC messes with your heart and stops it. It also paralyses your brain and muscles and prevent you from resqueing yourself.
"M'lud, some random bloke on a hobby forum said it would be ok...."