All things the same is their more danger in a 120 volt ac 60 hz than a 120 volt dc shock ?
All things the same is their more danger in a 120 volt ac 60 hz than a 120 volt dc shock ?
... in fact DC is used to stop defib.
Actually DC is used to stop fibrillation, and that process is called defib.
DC can also be used to restart normal rhythm from a flat line state.
I have worked in a lot of different specialties in the electrical industry. My forte was service as I love figuring things out. But I also have worked in the electrical sign industry. I, for whatever reason, have likened the feel of getting shocked to a hammer. And the hammer gets bigger as the voltage goes up. I have had the displeasure to be hit off of a 15KV neon transformer. That is a big hammer. I knew this old guy named John that told me I didn't need a meter. This was many years ago. I asked him how he checked voltage. So we were out in the field one day and he said "I am going to answer your question". We were in a business that had 120/208V for utility loads and 277/480V for the lighting loads. He licked his finger and grabbed a wire and tapped it with his finger. He flinched a little and said, "This is 120v". At some other point, he did the same thing and snapped his hand back. He said, "This is 277v". I looked at him and told him I would stick to my meter.
Would you believe that a similar method was shown in Electrical Handbook's of the 1920"s?
Sad, but true.
Actually DC is used to stop fibrillation, and that process is called defib.
DC can also be used to restart normal rhythm from a flat line state.
In an experiment, two rabbits were connected in series across a DC 120V power source. The moment supply was turned on, the rabbit connected to the positive terminal died and the other rabbit remained alive. When the supply polarity changed, it also died. So it seems that which polarity DC conductor is earthed decides the safety in your case.please discuss how the shock of the earthed DC conductor is more or less dangerous than getting shocked by the neutral of AC. JK.
One needs to also know the resistance or even impedance of the current path through the body. Apply voltage to one path in one instance and same voltage to two different input points on the body and you can get different results, plus there is a big difference from the path being between just two fingers on same hand as opposed to current passing through abdomen and through critical organs. If heart gets it you are often dead very quickly, but damage a liver or other organs you may have a slow and painful death.LOL, good catch.
But it's worth pointing out, that takes place at nowhere near the levels we are discussing here.
Back to the 5 lb brick or hammer issue, BOTH are potentially lethal, so neither is safer. Safety is not really qualitative; something is either safe, or not safe. 120V, whether AC or DC, is not safe. I know your question technically was about "more danger", which I suppose might be qualitative, but the differences between those choices would only be by small degrees, which should not be considered relevant. The amendment to the brick / hammer statement I usually make is this:
The quality of suffering before death you experience from AC is likely slightly worse than the quality of suffering before death you experience from DC, but so far as we know, nobody has returned to provide feedback.
Cases in point: I have been shocked 480V AC and survived, but it fricking HURT like hell and I screamed and cursed for hours afterward. The only person I have ever seen killed by electricity died from touching a DC bus on a drive. He died quietly.
What is the impedance of the 15KV neon transformer compared to a 15KV power transformer, that neon transformer will have current limitations, and they may be low enough even to effect the low current passing through a human body during such an incident. On the farms the electric fence chargers also can run into the 10's of thousands of volts, but they have a very high impedance as well which limits the current to a non lethal level, but not all critters are immune to it. Cattle are thick skinned and may need 10kV to get enough of a shock to be effective yet a bird happens to come in contact with that line (and a grounded object) and they are instantly dead, seen it happen a few times, or at least seen the dead birds laying next to the line.I have worked in a lot of different specialties in the electrical industry. My forte was service as I love figuring things out. But I also have worked in the electrical sign industry. I, for whatever reason, have likened the feel of getting shocked to a hammer. And the hammer gets bigger as the voltage goes up. I have had the displeasure to be hit off of a 15KV neon transformer. That is a big hammer. I knew this old guy named John that told me I didn't need a meter. This was many years ago. I asked him how he checked voltage. So we were out in the field one day and he said "I am going to answer your question". We were in a business that had 120/208V for utility loads and 277/480V for the lighting loads. He licked his finger and grabbed a wire and tapped it with his finger. He flinched a little and said, "This is 120v". At some other point, he did the same thing and snapped his hand back. He said, "This is 277v". I looked at him and told him I would stick to my meter.
I kind of hit on the zero crossing in response above this one, but I don't know that it increases the chances by all that much. I do think a lower frequency possibly does result in more realistic response time to be able to pull away though. 50 and 60 Hertz is just too fast of a cycle time for human response, and is more luck than anything IMO if you would hit that cycle just right.I think DC is more dangerous since once it grabs hold of you, it doesn't let go. With AC, seems like you would have a better chance of releasing the wire or source when the potential crosses zero. However, AC is more prevalent in residential and commercial and is why more people are shocked by it.
This guy was old as dirt. Maybe that was his reference manual.
All things the same is their more danger in a 120 volt ac 60 hz than a 120 volt dc shock ?
In an experiment, two rabbits were connected in series across a DC 120V power source. The moment supply was turned on, the rabbit connected to the positive terminal died and the other rabbit remained alive. When the supply polarity changed, it also died. So it seems that which polarity DC conductor is earthed decides the safety in your case.