goldbrick
Posts: 1710
Joined: Tue Aug 01, 2017 3:33 pm
Delivery Date: 01 Aug 2017
Leaf Number: 311806
Location: Boulder, CO

Re: Nissan EVSE not functioning

I don't need my Rav4 Prime EVSE so I'll probably sell it but if I was going to convert it to 240V I'd replace the plug, too. Some people making adapters used twist-lock connectors and put all kinds of labels on them but I think replacing the plug is the safest way to go.

From what I've read, Prius Prime owners have been doing it for years but who knows if/when the manufacturer will change the design.
GerryAZ
Gold Member
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Joined: Mon Nov 22, 2010 6:47 pm
Delivery Date: 12 Jun 2011
Location: Phoenix, AZ

Re: Nissan EVSE not functioning

Comments and answers to some issues discussed earlier in this thread:

The 3-phase, 4-wire delta circuit has 240 volts between phases with 120 volts between two of the phases and the grounded neutral and 208 volts between the high-leg phase and neutral. In general, that connection was used for industrial installations to provide 3-phase, 240-volt power for motor loads with a limited amount of 120-volt power from two of the phases and neutral for receptacles and lighting. The high leg was never used with neutral (only with the other phases). The 3-phase 208Y/120-volt wye connection is used to allow all three phases to supply 120-volt loads from line to neutral and 3-phase loads line to line. 208 volts is low, but within tolerance for 230-volt, 3-phase motors. If a NEMA 14-50 receptacle is connected to a 4-wire delta circuit, its line terminals must be connected to the two phases which are 120 volts to neutral (not to the high leg). The line terminals of a 14-50 receptacle may be connected to any two phases of a 208Y/120-volt circuit.

I just made some measurements on the Nissan EVSE that came with my 2019 SL Plus. The neutral terminal of the 14-50 plug is not connected to anything in the EVSE. The 120-volt adapter connects line, neutral, and ground from the 120-volt plug to line 1, line 2, and ground of the 14-50 plug. Line and neutral of the 120-volt are connected to line 1 and line 2 of the 14-50 plug respectively when inserted one way or line 2 and line 1 respectively when inserted the other way. This allows the EVSE cord to go either up or down from a 120-volt wall receptacle, depending upon how the 14-50 plug is connected to the adapter. THE NISSAN 120-VOLT ADAPTER SHOULD NOT BE USED WITH ANY OTHER EVSE.

The Nissan EVSE will work on 240-volt circuits and 120-volt circuits with its adapter, but will not work on 208 volts. It will start to charge and then shut down after a few seconds because the voltage under load is lower than it deems acceptable. AeroVironment (no longer available), Clipper Creek, Grizzl-e, and other manufacturers make EVSE's that work fine on both 208- and 240-volt circuits.
Gerry
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015; traded 8/10/2019 at 82,436 miles
White LEAF 2019 SL Plus purchased 8/10/2019
goldbrick
Posts: 1710
Joined: Tue Aug 01, 2017 3:33 pm
Delivery Date: 01 Aug 2017
Leaf Number: 311806
Location: Boulder, CO

Re: Nissan EVSE not functioning

Thanks GerryAZ. Great info as always.

I don't have one of these EVSE's so can you explain this part a little more?
GerryAZ wrote: Sun Dec 19, 2021 9:29 pmThe 120-volt adapter connects line, neutral, and ground from the 120-volt plug to line 1, line 2, and ground of the 14-50 plug. Line and neutral of the 120-volt are connected to line 1 and line 2 of the 14-50 plug respectively when inserted one way or line 2 and line 1 respectively when inserted the other way.
Is the adapter symmetrical so it can swap neutral and ground? I can't picture how the plug could go in more than one way if it's truly a 14-50 shaped plug. TIA.
GerryAZ
Gold Member
Posts: 3272
Joined: Mon Nov 22, 2010 6:47 pm
Delivery Date: 12 Jun 2011
Location: Phoenix, AZ

Re: Nissan EVSE not functioning

The plug on the cord is a 14-50, but the adapter has two ground terminal openings which have slots to also accommodate the neutral terminal (which does not make metallic contact). I have attached a couple photos.
EVSE Adapter1A.jpg
EVSE Adapter2A.jpg
As you can see, the double ground terminal allows the adapter to attach to the 14-50 plug in two different orientations (180 degrees apart) so that the 120-volt plug can be oriented with ground terminal up or down for wall receptacles.
You do not have the required permissions to view the files attached to this post.
Gerry
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015; traded 8/10/2019 at 82,436 miles
White LEAF 2019 SL Plus purchased 8/10/2019
goldbrick
Posts: 1710
Joined: Tue Aug 01, 2017 3:33 pm
Delivery Date: 01 Aug 2017
Leaf Number: 311806
Location: Boulder, CO

Re: Nissan EVSE not functioning

That's interesting. So the ground/neutral connections only connect to a ground prong and not a neutral prong. Very clever.

I had a Nissan 240V EVSE but I gave it to my dad. I seem to remember that one was gray (same color as the 14-50 plug) and I don't remember that configuration of holes but it's been quite a while and I never personally used it. I'll have to take a better look at it next time I visit.

Thanks for taking the time to post the photos and to explain it all. Much appreciated!
GerryAZ
Gold Member
Posts: 3272
Joined: Mon Nov 22, 2010 6:47 pm
Delivery Date: 12 Jun 2011
Location: Phoenix, AZ

Re: Nissan EVSE not functioning

The adapter plug has plastic slots for the neutral prong of the 14-50 plug to slip into, but there are no metallic connections. The ground prong of the 14-50 plug connects to the ground prong of the 120V plug in either position.
Gerry
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015; traded 8/10/2019 at 82,436 miles
White LEAF 2019 SL Plus purchased 8/10/2019

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