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Re: [EVDL] Hyperbole from "Infrastructure Industry"

On 15 Sep 2010 at 15:47, Dennis Miles wrote:

> If the driver/owner of a $250,000 RV Bus can plug in to [email protected], why
> can not you or I ???

The usual range plug is fine for us as EV hobbyists, but I'm not sure sure
it's well suited to general use.

For one thing, it takes a fair bit of oomph to insert and remove the plug.
Some drivers, especially older ones, might not have the strength.

Also, the pins are hot and exposed as you insert or remove the plug from the
receptacle, creating a signifcant shock hazard.

Most European 240v connectors are recessed, and have insulator sleeves on
the pins. This makes them quite a bit safer as it's much more difficult to
contact live pins. Ours don't have those features. I suspect that if the
standard NEMA plugs were being developed today, the manufacturers' attorneys
would have fits over the potential for liability.

I think the US-spec 14-50 pair is probably acceptable when the recept is
mainly a disconnecting device, used infrequently, as it is for ranges and
welders. It's less so when the connection is to be made one or more times
per day.

So, I agree that an improved plug/receptacle pair is a good idea for mass
market EVs. Is J1772 the right answer? I don't know, but it looks like
we're stuck with it, at least for now.

David Roden - Akron, Ohio, USA
EVDL Administrator

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