Current kills, and 30 volts and your skin resistance will supply enough to stop your heart.48v you can still touch without being electrocuted being considered a safe limit.
I was just thinking the same after this.Can you clue me in on the proper order of disconnecting the BMS from the battery?
Well, that is the general wisdom, volts will ALWAYS have enough amps to kill...ANYTIME you mess with the BMS Harness Leads, disconnect the BMS !
Same if you are disconnecting Busbars on the battery assembly etc.
Failure to do so can very often result in Magic Smoke.
As for the AC DC which is dangerous... SERIOUSLY, Tesla & Edison fought that out 100 years ago.
Volts do NOT KILL, AMPS DO !
AC & DC can be safe OR dangerous - All Electricity MUST BE HANDLED WITH RESPECT !
48 volts basically can't hurt you... i mean if you place salt water soaked pads on your chest maybe. Even OSHA say anything under 50v doesn't require PPE, now that being said the battery system have usually have massive current so burn and exploding metal and batteries is very much a hazzardThat is a nice set of answers regarding Poe shock hazards to ground... completely different from 48v battery terminal to terminal...
Trust me... 48v can and will kill you. It is very easy to prevent electrocution from it, as it isn’t grounded, and if you only handle one conductor at a time, a shock is unlikely... but 48v is well above the 28v, skin voltage shock threshold...
ANYTIME you mess with the BMS Harness Leads, disconnect the BMS !
Definitely not safe to lick.I disagree with you on the 48v being considered a save to touch voltage...
I do not recommend testing this...
How you know? ??Definitely not safe to lick.
Ask me how I know???
I lied, I don't really want you to ask.How you know? ??
Wow, you've obviously not worked with telecom equipment. I'll continue to follow the instructions of my first electronics instructor, treat anything above 30 volts as deadly. Even if he was an ex-nazi, he knows what he was talking about. High current is indeed dangerous, I have personally witnessed what negative 2 volts at 500 amps can do to a screwdriver (MRI machines can use some interesting voltages and currents).48 volts basically can't hurt you... i mean if you place salt water soaked pads on your chest maybe. Even OSHA say anything under 50v doesn't require PPE, now that being said the battery system have usually have massive current so burn and exploding metal and batteries is very much a hazzard
He is probably just fishing for reactions, and never played with anything above 12v.Wow, you've obviously not worked with telecom equipment. I'll continue to follow the instructions of my first electronics instructor, treat anything above 30 volts as deadly. Even if he was an ex-nazi, he knows what he was talking about. High current is indeed dangerous, I have personally witnessed what negative 2 volts at 500 amps can do to a screwdriver (MRI machines can use some interesting voltages and currents).
Yes, I should really stop trying to convince people. I just didn't want people with zero experience to read the thread and think "everything is fine, I read it on the internet".I dropped a wrench the other day and shorted 48V.
A busbar melted. The screw disintegrated. And the terminal is destroyed.
About 6 nuts got welded to the studs.
I'm sure that wasn't good for any of the cells.
It took about 2 seconds.