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So I don't have a garage and have to charge outdoors. Currently I charge with a NEMA 5-15 adapter through a 12-gauge extension cord to a generic 110V outlet. I recently had a 30A line put in, but the electrician put on an L14-30R receptacle which as far as I can tell is typically used for generators. I want to have this receptacle changed to either a 10-30 or a 14-30R and run an appropriate extension cord and an appropriate adapter.

The problem I'm having is this:

* For 10-30, there are lots of extension cables that appear to be made for RVs, but 10-30 has no ground and this will be run outdoors in a rainy region. Is this dangerous?
* For 14-30, there is a ground, but extension cables appear to be few and far between and expensive. They appear to be mostly made for dryers and as such there isn't a huge market for dryer extension cables.

I know ideally a 50A line would be appropriate, but that's not what I have, so I'm working on 30. Is there anything I'm missing? Which interface should I be using to charge my car outdoors via an extension cable?

Thanks

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