Jerryr
Posts: 15
Joined: Mon May 14, 2018 8:18 am
Delivery Date: 14 May 2018
Leaf Number: 307113

Re: 2018 Leaf EVS

Fri May 18, 2018 7:58 pm

My opinion, if you are going to drop a NEMA 14-50R line I’d run it with #6 wire. It costs about 30% more than #8. Still protect it with a 40 amp breaker for a 32 amp EVSE.

If in the future you need to repurpose that outlet for something like an RV with 50 amp Service, simply replace the 40 amp breaker and you’re covered. 8/3 vs 6/3 UF cost is about $2.30/ft vs $3.50/ft

I did this with my kitchen range which was listed to connect to a 14-50R with 40 amp service. Later I installed a 50 amp range and I just replaced the breaker.

#6 is not as easy to work with as #8 but once it’s done, it’s done.

Btw, the 14-50R receptacle is the standard for both 40amp and 50amp connections since there’s no 40 amp only receptacle.

The thing that baffles me is that Nissan advertises the new L1/L2 120/240v EVSE that you can connect it to a 240v dryer outlet. Every dryer outlet I’ve seen is 30 amp 240v.

MikeD
Posts: 638
Joined: Thu Jun 24, 2010 6:14 am
Delivery Date: 12 May 2011
Leaf Number: 592

Re: 2018 Leaf EVSE

Sun May 20, 2018 12:55 pm

Jerryr: A question for you (and anyone else): Since we still don't have sufficient widespread EV fast charging infrastructure in the US, I think one of the major reasons this portable EVSE uses a 14-50R outlet (whose neutral is not used) as opposed to a 6-50R outlet (which has no neutral) is that 14-50R 50a outlets (unlike 6-50R outlets) are commonly available at RV campground sites -- which makes many longer trips more feasible if you're carrying this EVSE with you. These RV outlets, I believe, are wired with AWG 6 wire and use 50a circuit breakers.

My question is this: Would you hesitate to use these outlets with this EVSE to charge your Leaf because the circuits don't use a 40a breaker? A 50a breaker appears to adequately protect the AWG 6 wiring's insulation (from overheating damage) according to NEC. If the answer is "no", then why not use a 50a breaker rather than a 40a one for a similar 6 AWG circuit at your home? And while you are buying a breaker, why not buy a GFCI type which adds a significant margin of safety? (Also note, I believe, that the latest NEC requires them for portable EVSEs like this one.)

MikeD
Posts: 638
Joined: Thu Jun 24, 2010 6:14 am
Delivery Date: 12 May 2011
Leaf Number: 592

Re: 2018 Leaf EVSE

Tue May 22, 2018 11:03 am

Important info from the "2018 LEAF Owner's Manual" to help prevent unnecessary damage to the EVSE's input power cable.

On page CH-26 concerning L2 charging using this EVSE it reads: "Use the EVSE with the plug in an upright position (the cord should extend down from the outlet).".
I believe this implies that your home's NEMA 14-50R EVSE receptacle should be mounted so that the equipment ground pin is at the top, as otherwise the EVSE's cord loops up then down rather than straight down from receptacle.

Also on page CH-19 concerning L1 charging using this EVSE it reads the same: "Use the EVSE with the plug in an upright position (the cord should extend down from the outlet).".
In this case the EVSE's (removable) L1 adapter can always be rotated to allow the EVSE to hang straight down regardless of whether the 5-15R's (or 5-20R's) ground pin is at the top or the bottom.

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