Nothing legitimate that I see - Europe and some other countries have been using 220V as the standard for a hundred years.johnr wrote:Legitimate concerns regarding use of 240V, but more than one way to address them.
Nothing legitimate that I see - Europe and some other countries have been using 220V as the standard for a hundred years.johnr wrote:Legitimate concerns regarding use of 240V, but more than one way to address them.
Having a person electrocuted while plugging in an EV could be catastrophic for the budding EV movement.evnow wrote:Nothing legitimate that I see - Europe and some other countries have been using 220V as the standard for a hundred years.johnr wrote:Legitimate concerns regarding use of 240V, but more than one way to address them.
The full quote ismywaracfirfoyff wrote: Having a person electrocuted while plugging in an EV could be catastrophic for the budding EV movement.
240v at 50-60Hz is one of the most dangerous combinations you could select for a power system:
http://forum.candm.com.au/showthread.php?t=6644
The good doctor is talking about AC vs DC, rather than 120 vs 240.In fact, 240V at 50-60 Hz, is one of the most dangerous combinations you could select for a power system! (The pathophysiology was not as well understood when Thomas Eddison and George Westinghouse were fighting their "War of Currents").
http://en.wikipedia.org/wiki/War_of_CurrentsTo summarise, ANY voltage, AC or DC, can kill under the right conditions. AC (certainly in household voltages) is EXTREMELY dangerous, and much moreso than DC.
In the "War of Currents" era (sometimes, "War of the Currents" or "Battle of Currents") in the late 1880s, George Westinghouse and Thomas Edison became adversaries due to Edison's promotion of direct current (DC) for electric power distribution over alternating current (AC) advocated by Westinghouse and Nikola Tesla.
Cool, it sounds like we're in agreementevnow wrote: The full quote is
The good doctor is talking about AC vs DC, rather than 120 vs 240.In fact, 240V at 50-60 Hz, is one of the most dangerous combinations you could select for a power system! (The pathophysiology was not as well understood when Thomas Eddison and George Westinghouse were fighting their "War of Currents").
Anyway ...
To summaries, ANY voltage, AC or DC, can kill under the right conditions. AC (certainly in household voltages) is EXTREMELY dangerous, and much moreso than DC.
Not trying to split hairs here but I didn't think anyone was questioning the utility of the J1772 charging connector. I think it was the lack of a simple plug for the input side of some EVSEs, notably AV's. This useful feature does not seem like any significant safety issue and would lower the needless expense of hardwiring for many EV adopters.mywaracfirfoyff wrote:....It would be silly to not ship new EVs with a standardized high power connector that wont kill people as easily.
A 21st century connector for a 21st century car....
This is a little silly. Just use a good 240V plug. All of Europe (and most of the world) runs on 240V and it is not like they are electrocuting themselves all the time!That's not because authorities fear that Americans will fry themselves right and left with a 240-volt system, but rather than the wall plugs available (think of the triple-pronged plug on an electric clothes drier or electric oven) aren't designed to be inserted and removed hundreds of times as could be the case with a portable 240-volt car-charging system.