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Outlet & Electrical Safety··@nwalsh_

My charger's plug fused to the extension cord I was using -- how much of this is on the extension cord vs. just bad luck?

Was using a regular household extension cord to reach my car from the nearest outlet while I wait to get a real circuit installed, and a few weeks in I went out to unplug and the charger's plug had literally fused to the extension cord's socket -- melted together, had to throw both out. Cord wasn't some super cheap no-name thing, but it also wasn't rated for anything special, just a standard outdoor extension cord. Everyone I've mentioned this to has a different take: some say extension cords are just never okay with EV charging no matter the gauge, others say it's fine if you get the right gauge and keep it short. Before I buy a replacement cord, I want to actually understand what failed here so I don't repeat it.
Filed under: Outlet & Electrical Safety
311 answers
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11 ANSWERS
jkimura
@jkimuraOctober 01, 2026
Plugging into a regular outlet is already a risk. Putting an extension cord in between makes it worse. Glad it was only the cord.
0 Reply
bhollister
@bhollisterOctober 01, 2026
Do you know the gauge? Most standard outdoor cords are 16 gauge. That's rated for 13 amps, which works out to about 10 amps continuous. Level 1 pulls 12 amps for 10+ hours, so you were over the limit every night. The ends are also the weak spot. When one of these melts, it's almost always at the plug and socket, not in the middle of the cord.
1 Reply
nwalsh_
@nwalsh_October 01, 2026
I honestly don't remember. It was a 25 ft and fairly thick, so I'd guess 14 but I really don't know. And it's 120, the cable that came with the car. The wall outlet looks fine, it was only the connection between the two that melted.
1 Reply
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bhollister
@bhollisterOctober 01, 2026
14 gauge is right at the limit for 12A continuous. It's not great but not crazy either. With that much load, though, a slightly worn socket on the cord is enough to cause what you saw.
0 Reply
gregm_67
@gregm_67October 01, 2026
How long until the circuit goes in? I had a licensed electrician put in a 6-20 for $300 and haven't thought about it since. Personally I wouldn't spend money on another cord for a temporary setup.
0 Reply
wadecross
@wadecrossOctober 01, 2026
$300 is a fair price. Just don't tell them it's for an EV when you call... the quote magically doubles
0 Reply
jkimura
@jkimuraOctober 01, 2026
Even with the right gauge, the end of the cord is still a cheap molded 5-15 socket. That's the part that failed. I wouldn't buy another one.
0 Reply
nwalsh_
@nwalsh_October 01, 2026
Electrician is supposed to come in about three weeks but has already moved it once. So I'm still stuck figuring out what to do until then.
0 Reply
vinnie_carbone
@vinnie_carboneOctober 01, 2026
I went through nearly the same thing with my Leaf a while back. I was using the 120 VAC charger with a heavy duty outdoor cord, 12 gauge, so I thought I had it covered. It ended up torching the outlet and tripping my GFCIs in the middle of the night. The cord itself was fine. The damage was at the plug end, same as yours. If you have three weeks to go, I would plug the factory cable straight into the wall outlet with nothing in between and check it with your hand in the morning for the first few nights. If it's warm, that's ok. If it's hot, stop using it. Level 1 into a good outlet worked for me for a long time before I got the 14-50.
0 Reply
anders_p
@anders_pOctober 01, 2026
Cooked mine on a non EV rated receptacle with no extension cord at all. The weak spot is the connection, every time.
0 Reply
craig_denton
@craig_dentonOctober 01, 2026
See if your car lets you set a lower charging current. Most of them do, either in the charge settings or in the app. At 8A instead of 12A you get a lot less heat at every connection, and you still add something like 25 to 30 miles overnight. For three weeks that might be enough depending on your commute.
0 Reply
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