Like all others said before its always wise to be carefull and if possible work without power applied .
However you will have to test you're projects so there will always be moments you will work under voltage .
Battery's (and capacitors) store energy which can take hours to charge but depending on what type of battery it is can discharge in seconds .
Don't let youreself be fooled by a nickel cadnium penlight for instance ,you might not expect it .
But we measured peaks over 200 Ampere from a AA Nicad battery .
Since that day i got a lot more carefull with throwing walkman battery's in my pockets .
What i mean to say is this low voltage doesnt mean no danger ,the danger just lies more in the burnwounds .
With battery's in series however 120 volts & up battery's can be very dangerous .
Like before the peakcurrents delivered can be very very high .
Simple car battery's are well capable of delivering 200 Ampere or more (you will have a voltage drop though) .
10 carbattery's in series delivering 120 (138) volt imagine youreself dropping a screwdriver .
I would put my money on the battery that screwdriver goes up in smoke .
Long ago at work i once made a wiring error with 12 gel battery's in series (12 volt 7Ah) a 6mm wire just dissapeared partly ,i was lucky black hands, black face wire & accu destroyed but i wasnt hurted .
Just be carefull with batterypowered projects .
Use fuses were possible and if unfused is needed switch on remotely (saves youre eyebrows).
Goodluck
Two things are infinite: the universe and human stupidity; and I'm not sure about the universe. Albert Einstein
Bookmarks