2000 volts...
- Thread starter Lectrician
- Start date
Quite an arc from a few PP3's...
http://www.youtube.com/watch?v=8hwLHdBTQ7s[/QUOTE]
rather mental surprised some off the batteries didn't explode
The voltage is high enough to puncture skin (600 v) so the only thing limiting the current is his body resistance.
If passed through his chest this current would almost certainly clamp his heart from moving, and the UV from the arc may damage his eyes.
A few seconds after his heart stops he may notice his peripheral vision getting less and less.
But then how many people have this many batteries lying around?
If passed through his chest this current would almost certainly clamp his heart from moving, and the UV from the arc may damage his eyes.
A few seconds after his heart stops he may notice his peripheral vision getting less and less.
But then how many people have this many batteries lying around?
Connecting a load of batteries in series will increase the open circuit voltage but it will also increase the total internal resistance. So the short circuit current will be comparable to that of a single PP3.rather mental surprised some off the batteries didn't explode
Still enough to do some serious damage to a person of course.
My guess would be an audio-visual hire company where it's generally considered good practice to put new batteries in radio mics before each performance.
What good practice use is there for the used ones?
Given that they generally have 1/3 to 1/2 of their total capacity left, they are fine for remote controls, clocks, even smoke alarms (so long as you remember to test them regularly) etc.
Most current model radiomics these days use 1 or 2 AA cells, rather than PP3's. I have over 100, just over 1/2 used AA cells in my storeroom. Again, very useful for remote controls, etc.
My BIL works in the NHS, they have an endless supply of part used AA batteries which have been used once in disposable equipment during operations! Seems like such a waste / not environmentally friendly but safety comes first.
Psychology is fascinating, and certainly not necessarily logical. Over the years/decades, I've been intrigued (and startled!) by how common it is for people to regard any electricity other than 'the mains' as being harmless - even that which comes fom a 230V-250V AC generator. I've seen it with banks of 90V 'HT batteries' (I doubt whether they still exist!) in series and also when, in my youth, I saw a lot of use of inverters run from 12V batteries with outputs anything from 200V to 1000V DC, and in a good few other situations. In the language of this day and age, maybe people should be reminded that 'tasars' are battery-powered!
Kind Regards, John
Kind Regards, John
OK, I'll revise my question slightly.
What good practice use by the audio-visual hire company is there for the used ones?
A bit of teased out wire wool across the terminals of a PP3 will ignite and burn quite well even if the battery is down to about 8 volts.
This is dangerous as molten metal can drip from the burning wire wool.
This is dangerous as molten metal can drip from the burning wire wool.
Give them away to poor pensioners - like me.
Production of interesting audio visual entertainment
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