But having a 5-20 outlet wired for 240V is dangerous and against code. Someone who doesn’t realize that it’s not standard could try to plug a 120V appliance in and get hurt or start a fire.
But having a 5-20 outlet wired for 240V is dangerous and against code. Someone who doesn’t realize that it’s not standard could try to plug a 120V appliance in and get hurt or start a fire.
davewill
Active Member
If it's only 10 inches long and maybe taped to the UMC adapter or labelled Tesla use only, I'm ok with it.
davewill
Active Member
There's actually nothing wrong with 14 gauge wire for a 15a 120v circuit for car charging. I'd prefer 12 gauge, but most homes, like mine, will have 14 because that's all that NEC calls for. Your example simply has a bad wiring job. While checking the wiring is is always a good idea when adding a major load like a car, that fact remains that 117v is entirely normal and is not a sign of anything wrong whatsoever.
Hell I saw 112v when charging at g-pa house over christmas, moved the car and shortened the extension cord to about 20ft and got it to 113/15ish and it did fine plugged in for 4 days straight. Also it was a repaired extension cord. 
Other day I plugged in and was getting 232ish @ 40a, on a circuit rated for 100a.
I've also turned 5-20 into 240V and I sharpie 240V ONLY on the face plate. It's my house, if someone else is plugging a cord into my outlets they'll probably die from a bullet wound before a house fire.
Other day I plugged in and was getting 232ish @ 40a, on a circuit rated for 100a.
I've also turned 5-20 into 240V and I sharpie 240V ONLY on the face plate. It's my house, if someone else is plugging a cord into my outlets they'll probably die from a bullet wound before a house fire.
Provided he had another breaker spot next to the single leg breaker he has now as the 6-20 will require a double breaker to pass both legs through.
BerTX
Supporting Member
All of these suggestions being put forth are all well and good for us geeks who like to build adapters and stretch the electrical code to the limit and beyond.
@Kenriko has a valid suggestion that most novices can do to get a mph of two of extra charging from a 120v outlet in many cases. Are there lots of variables that are not covered in the video that might make it not such a good idea? Maybe. But I don't really want to watch a video that is longer than the actual amount of time involved in making the electrical modification.
I think it's a good idea for people to explore.
@Kenriko has a valid suggestion that most novices can do to get a mph of two of extra charging from a 120v outlet in many cases. Are there lots of variables that are not covered in the video that might make it not such a good idea? Maybe. But I don't really want to watch a video that is longer than the actual amount of time involved in making the electrical modification.
I think it's a good idea for people to explore.
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