I live in an apartment and there is an nema 5-15 outlet that I can barely reach, probably another 25 feet. Can I use an extension cord and if so, what kind would I need?
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Extension Cord?
- Thread starter darkrai
- Start date
If you really have to do this (and want to do it safely), you're better off using a J1772 extension cord than 5-15 extension cord (if you end up using a regular extension cord, don't using anything thinner than 12 gauge and check the cable and plugs quite often to ensure they're not overheating and causing a fire hazard), but they're not cheap:
https://www.amazon.com/JLONG-40ft-J1772-extension-cable/dp/B01B6OH99S
https://www.amazon.com/JLONG-40ft-J1772-extension-cable/dp/B01B6OH99S
spsheridan
Member
Since the NEMA 5-15 outlet supplies 15 amps max, why would he need to go with an extension cord that supports 40 amps? Is it because of the additional potential resistive loss due to added length in the extension cord?
coconutboy84
Member
Don’t listen to people. Get a good 10 or 12 gauge and you’re good to go. No problem.
I just linked the first one that came up on Amazon as an example (OP can search for cheaper ones if needed).
But check the plugs to make sure they're not overheating.
For 50ft I would definitely aim for 10gauge.
The argument to use the extension on the car end is that the Tesla AC adapter has a heat sensor.
Personally I have just checked the cord a few times when I use my 10gauge 25foot extension cord and been fine. I do always check it till I have done so enough times I am comfortable with the outlet.
The argument to use the extension on the car end is that the Tesla AC adapter has a heat sensor.
Personally I have just checked the cord a few times when I use my 10gauge 25foot extension cord and been fine. I do always check it till I have done so enough times I am comfortable with the outlet.
10 gauge... A 12 gauge 50' cord will burn 1mi/hr in heat and voltage loss.
I'd go 10 gauge even for 25'.
The expense difference in the cord is not that big, and you'll get more charge and less potential exposure to flame.
I'd go 10 gauge even for 25'.
The expense difference in the cord is not that big, and you'll get more charge and less potential exposure to flame.
timk225
Active Member
I made a video a few months ago, showing 3 different extension cords with their lengths and gauges and the voltage loss in the car compared to plugging the charging adapter directly into a 5-15 outlet. There can be quite a difference depending on cable size and quality! Don't buy your extension cord at Wal-Mart!
spsheridan
Member
If 25 ft is long enough, go for that rather than 50 ft. Shorter is better in order to reduce resistive loss in the extension cord.
The gauge is more about the voltage drop and heating in the cord itself, although I'd also expect that the ends would be better connected and less likely to get warm in a 10 gauge. I assume the maker would expect you to be running more current in a 10 gauge and would make those connections better.
Appreciate the responses guys. So the 25 foot 12 gauge ended up being too short so a 50 ft is needed. Suggestions?
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