Correct J-1772 Extension cord

[RedDragon]

All - I want to buy a J-1772 extension cord. By extension cord i mean one that plugs into the output end of an EVSE and then plugs into the MME charging port. I would like to just have one cord i can use in all use cases, so i dont have to think about it. I believe (please correct me if im wrong) that the MAX amps the MME can take is 48. I have also purchased a 60amp rated tesla tap mini. Also it seems like most of the extensions out there say they can "support" 40 amp charging (question on that below).

A few questions - Im not an electrician or engineer so please feel free to correct me here:

1) if i am using this when plugged in with the Ford Mobile Charger, it seems like i could get any extension that is rated at 40 amps or higher and be fine. I am basing this on the max capacity of the mobile charger at 32 amps when plugged into a NEMA 15-40

2) If I am using this at a public level 2 charger:
a) it seems like any public charger up to 7kw should be fine with a 40 amp rated extension cord. The Mach E will communicate with the charger and only draw down like 30ish amps given the power limitation of the public charger. Is this correct?
b) i was at a park in northern new jersey yesterday and saw there was a 10kw charger there. The 10kw was listed on plugshare (Volta chargers in Overpeck park if anyone is interested - its free). In order to charge at this AND use the extension (if needed), i would need an extension that can support 50amps, given the MME can accept 48amps and the charger can put out low 40s amps, correct? if i had a 40 amp cord in the middle, wouldnt that be a problem?
c) similar to b above, i have read that some Tesla destination chargers can put out up to 80amps. The MME can take 48amps. I have a 60 amp rated Tesla Tap, to have the buffer on the MME's top draw rate. So if i needed to use the tesla tap + extension cord and wanted to not worry about anything, then i would need a 60amp extension right?

The conclusion i am coming to is that its probably best to have a 60amp J-1772 extension cord to cover all use case scenarios, but i cant seem to find any with this level of rating. Again - please correct me here.

3) a question about products. On amazon, the Lectron extension says its "compatible with all vehicle chargers and supports up to 40amps of charging". However, the pictures show the rating to be 40AMP / 240V (look at the one where it shows how to connect it, the rating is printed on the black cap). If you are going to claim to support up to 40amps of charging (like that 10kw charger i saw yesterday), shouldnt it say its a 50 AMP / 240v in order to have the required buffer (link below)?:

https://www.amazon.com/Lectron-J177...9Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=

4) last question i promise - Am i just overthinking all this b/c Level 2 public charging is basically all low 30s amps anyway, so any of these things i see will work. Again, i just want one cord and I would like to just future proof it. Im not as worried about cost.

Thanks all!!

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[RedDragon]

All - I want to buy a J-1772 extension cord. By extension cord i mean one that plugs into the output end of an EVSE and then plugs into the MME charging port. I would like to just have one cord i can use in all use cases, so i dont have to think about it. I believe (please correct me if im wrong) that the MAX amps the MME can take is 48. I have also purchased a 60amp rated tesla tap mini. Also it seems like most of the extensions out there say they can "support" 40 amp charging (question on that below).

A few questions - Im not an electrician or engineer so please feel free to correct me here:

1) if i am using this when plugged in with the Ford Mobile Charger, it seems like i could get any extension that is rated at 40 amps or higher and be fine. I am basing this on the max capacity of the mobile charger at 32 amps when plugged into a NEMA 15-40

2) If I am using this at a public level 2 charger:
a) it seems like any public charger up to 7kw should be fine with a 40 amp rated extension cord. The Mach E will communicate with the charger and only draw down like 30ish amps given the power limitation of the public charger. Is this correct?
b) i was at a park in northern new jersey yesterday and saw there was a 10kw charger there. The 10kw was listed on plugshare (Volta chargers in Overpeck park if anyone is interested - its free). In order to charge at this AND use the extension (if needed), i would need an extension that can support 50amps, given the MME can accept 48amps and the charger can put out low 40s amps, correct? if i had a 40 amp cord in the middle, wouldnt that be a problem?
c) similar to b above, i have read that some Tesla destination chargers can put out up to 80amps. The MME can take 48amps. I have a 60 amp rated Tesla Tap, to have the buffer on the MME's top draw rate. So if i needed to use the tesla tap + extension cord and wanted to not worry about anything, then i would need a 60amp extension right?

The conclusion i am coming to is that its probably best to have a 60amp J-1772 extension cord to cover all use case scenarios, but i cant seem to find any with this level of rating. Again - please correct me here.

3) a question about products. On amazon, the Lectron extension says its "compatible with all vehicle chargers and supports up to 40amps of charging". However, the pictures show the rating to be 40AMP / 240V (look at the one where it shows how to connect it, the rating is printed on the black cap). If you are going to claim to support up to 40amps of charging (like that 10kw charger i saw yesterday), shouldnt it say its a 50 AMP / 240v in order to have the required buffer (link below)?:

https://www.amazon.com/Lectron-J1772-Extension-Compatible-Chargers/dp/B0821FCF7P/ref=sr_1_1_sspa?keywords=j1772+extension+cable+60+amp&qid=1639411207&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUExSlpRTTFTOFZQNUlTJmVuY3J5cHRlZElkPUEwMjUzODczMlBNMVVRU0RMN1NRQyZlbmNyeXB0ZWRBZElkPUEwODc5NTA4MkJaREgzOUlWOE9YRiZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=

4) last question i promise - Am i just overthinking all this b/c Level 2 public charging is basically all low 30s amps anyway, so any of these things i see will work. Again, i just want one cord and I would like to just future proof it. Im not as worried about cost.

Thanks all!!

sorry - in 1) above i meant NEMA 15-40.

 

[RedDragon]

sorry - in 1) above i meant NEMA 15-40.

or 14-50, rather - not enough coffee this AM

 

[generaltso]

3) a question about products. On amazon, the Lectron extension says its "compatible with all vehicle chargers and supports up to 40amps of charging". However, the pictures show the rating to be 40AMP / 240V (look at the one where it shows how to connect it, the rating is printed on the black cap). If you are going to claim to support up to 40amps of charging (like that 10kw charger i saw yesterday), shouldnt it say its a 50 AMP / 240v in order to have the required buffer (link below)?:

Well, technically it can support 40A charging with a 40A rating. It's not until you have it plugged in for more than 3 hours that de-rating for safety comes into play.

You're correct that a 40A extension cord would be fine for MOST L2 public charging stations, but not necessarily all. A 60A extension would cover the MME, but I've never seen one above 40A. This problem would completely go away if we could just reduce the power draw in the car, but Ford hasn't given us that ability. For now, all you can really do is get a 40A extension and not use it on stations that could supply more than 32A (or 40A for less than 3 hours).

 

[hybrid2bev]

All - I want to buy a J-1772 extension cord. By extension cord i mean one that plugs into the output end of an EVSE and then plugs into the MME charging port. I would like to just have one cord i can use in all use cases, so i dont have to think about it. I believe (please correct me if im wrong) that the MAX amps the MME can take is 48. I have also purchased a 60amp rated tesla tap mini. Also it seems like most of the extensions out there say they can "support" 40 amp charging (question on that below).

A few questions - Im not an electrician or engineer so please feel free to correct me here:

1) if i am using this when plugged in with the Ford Mobile Charger, it seems like i could get any extension that is rated at 40 amps or higher and be fine. I am basing this on the max capacity of the mobile charger at 32 amps when plugged into a NEMA 15-40

2) If I am using this at a public level 2 charger:
a) it seems like any public charger up to 7kw should be fine with a 40 amp rated extension cord. The Mach E will communicate with the charger and only draw down like 30ish amps given the power limitation of the public charger. Is this correct?
b) i was at a park in northern new jersey yesterday and saw there was a 10kw charger there. The 10kw was listed on plugshare (Volta chargers in Overpeck park if anyone is interested - its free). In order to charge at this AND use the extension (if needed), i would need an extension that can support 50amps, given the MME can accept 48amps and the charger can put out low 40s amps, correct? if i had a 40 amp cord in the middle, wouldnt that be a problem?
c) similar to b above, i have read that some Tesla destination chargers can put out up to 80amps. The MME can take 48amps. I have a 60 amp rated Tesla Tap, to have the buffer on the MME's top draw rate. So if i needed to use the tesla tap + extension cord and wanted to not worry about anything, then i would need a 60amp extension right?

The conclusion i am coming to is that its probably best to have a 60amp J-1772 extension cord to cover all use case scenarios, but i cant seem to find any with this level of rating. Again - please correct me here.

3) a question about products. On amazon, the Lectron extension says its "compatible with all vehicle chargers and supports up to 40amps of charging". However, the pictures show the rating to be 40AMP / 240V (look at the one where it shows how to connect it, the rating is printed on the black cap). If you are going to claim to support up to 40amps of charging (like that 10kw charger i saw yesterday), shouldnt it say its a 50 AMP / 240v in order to have the required buffer (link below)?:

https://www.amazon.com/Lectron-J1772-Extension-Compatible-Chargers/dp/B0821FCF7P/ref=sr_1_1_sspa?keywords=j1772+extension+cable+60+amp&qid=1639411207&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUExSlpRTTFTOFZQNUlTJmVuY3J5cHRlZElkPUEwMjUzODczMlBNMVVRU0RMN1NRQyZlbmNyeXB0ZWRBZElkPUEwODc5NTA4MkJaREgzOUlWOE9YRiZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=

4) last question i promise - Am i just overthinking all this b/c Level 2 public charging is basically all low 30s amps anyway, so any of these things i see will work. Again, i just want one cord and I would like to just future proof it. Im not as worried about cost.

Thanks all!!

Calling @JamieGeek

 

[JamieGeek]

I have a 40amp J1772 extension (40 ft), I've only run about 28 amps through it, however.

(Using it here at a campground since the 14-50 plug is too far away for my Clipper Creek EVSE to reach.)

It lives in the back of the car along with the Ford EVSE and my Clipper Creek EVSE (all under the panel in the back).

Calling @JamieGeek

LOL Typing this up when you posted...be patient

 

[ZuleMME]

I bought this one:
https://www.amazon.com/gp/product/B0821FCF7P

Put 24amps through normally but have run 30amps also just fine. In general I'm of the lower is better mentality as you loose more to inefficiency when you ramp up and I normally have plenty of time to charge at slower speeds. It's rated to 40amp and is honestly higher gauge wire than my OpenEVSE came with which is rated 40amps. Pretty high end cable.

 

[RedDragon]

Thanks all. So it seems like getting this one would be better than the Lectron, correct?

I say this because if you look in the pictures, the printed rating is 50A / 240 V instead of 40A / 240V on the Lectron. At least you could feel better about using the 10kw charger (in my example above), just in case.

Also - is there any specific reason why no one makes a 60 amp extension?

 

[RedDragon]

Thanks all. So it seems like getting this one would be better than the Lectron, correct?

I say this because if you look in the pictures, the printed rating is 50A / 240 V instead of 40A / 240V on the Lectron. At least you could feel better about using the 10kw charger (in my example above), just in case.

Also - is there any specific reason why no one makes a 60 amp extension?

link to the other cord below:

https://www.amazon.com/Inteset-J-17...jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==

Man - i really need to caffeinate - one of those days.

 

[ZuleMME]

Here is my lectron, seems to be better to be honest:

 

[EELinneman]

I bought this one
https://www.amazon.com/gp/product/B09BW6MN3J/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Tested it once and it worked fine.

 

[ZuleMME]

I bought this one
https://www.amazon.com/gp/product/B09BW6MN3J/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Tested it once and it worked fine.

Interesting that has the same pics as what @RedDragon posted above. I wonder if it really is the same gauge wires? Can you take a pic of the actual writing on the cable? So far I'd recommend the lectron's 2x8awg and 1x10awg over a 3x10awg...

 

[RedDragon]

I have a 40amp J1772 extension (40 ft), I've only run about 28 amps through it, however.

(Using it here at a campground since the 14-50 plug is too far away for my Clipper Creek EVSE to reach.)

It lives in the back of the car along with the Ford EVSE and my Clipper Creek EVSE (all under the panel in the back).

LOL Typing this up when you posted...be patient

Interesting that has the same pics as what @RedDragon posted above. I wonder if it really is the same gauge wires? Can you take a pic of the actual writing on the cable? So far I'd recommend the lectron's 2x8awg and 1x10awg over a 3x10awg...

yes thats the 30 ft version of the one i posted above.

Noob question again - what are you looking for on those numbers where you were arriving at the conclusion that the Lectron could be better than the second one, despite it being 40A vs this one saying 50A? Feel free just to post a link on the basics of this if too much to explain as, again, im a noob at this stuff.

 

[RedDragon]

Also another question on this. Is there any reason why Ford chose to limit the charging capacity of the Ford Moble Charger to 32A, when the Mach E can handle 48A and a NEMA 14-50 (got it right this time!) should be 50A? I would have thought they would have taken the upper limit on the mobile to 40A, but there is probably something i dont understand about the whole circuitry of using a NEMA 14-50.

 

[ZuleMME]

yes thats the 30 ft version of the one i posted above.

Noob question again - what are you looking for on those numbers where you were arriving at the conclusion that the Lectron could be better than the second one, despite it being 40A vs this one saying 50A? Feel free just to post a link on the basics of this if too much to explain as, again, im a noob at this stuff.

8awg is thicker better wire than 10awg and can handle more current.

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