jjeff
Posts: 2171
Joined: Wed Jan 13, 2016 9:10 am
Delivery Date: 13 Jul 2014
Leaf Number: 422121
Location: MSP MN

Re: Installing 4-prong charger on 3-wire 240V distribution

Fri Aug 21, 2020 7:42 am

alozzy wrote:
Thu Aug 20, 2020 9:23 pm
FWIW, a 10-30p to 14-30r adapter cable can be purchased here:

https://bit.ly/34jGfwb
If using the OEM Leaf L2 EVSE wouldn't the OP need a 10-30p to 14-50r? One way around this would be to cut off the neutral prong on the EVSE as it doesn't use the neutral anyway but then you'd run into the issue of plugging a 27.5a non-adjustable EVSE into probably a 30a circuit.......this would be a better option to do with an adjustable EVSE like Juiceboxes or others.
2012 SL purchased used 2/'16
2013 S w/QC purchased new
Juicebox Premium 60a L1/L2 EVSE, Ebusbar 16a L1/L2 EVSE
'12 EVSEupgrade'd 20a L1/L2 EVSE, '13 EVSEupgrade'd adjustable 6-20a L2, 6-13a L1 EVSE
Zencar 13, 20, 30a L1/L2 portable EVSE
GE Durastation 30a

User avatar
jlv
Moderator
Posts: 1492
Joined: Thu Apr 24, 2014 6:08 pm
Delivery Date: 30 Apr 2014
Leaf Number: 424487
Location: Massachusetts

Re: Installing 4-prong charger on 3-wire 240V distribution

Fri Aug 21, 2020 7:43 am

alozzy wrote:
Thu Aug 20, 2020 9:23 pm
FWIW, a 10-30p to 14-30r adapter cable can be purchased here:

https://bit.ly/34jGfwb
Which is just here:
https://www.evseadapters.com/products/n ... r-adapter/

(I'm not sure why you used bit.ly to obscure the link)
LEAF '13 SL+Prem (mfg 12/13, leased 4/14, bought 5/17, sold 11/18, 34K mi, AHr 58, SOH 87%)
Tesla S 75D (3/17, 45K mi)
Tesla X 100D (12/18, 23K mi)
ICE free since '18
100K+ 100% BEV miles since '14

DaveinOlyWA
Posts: 15147
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: Installing 4-prong charger on 3-wire 240V distribution

Fri Aug 21, 2020 7:55 am

Probably already got this info but you NEED ground. You don't need neutral so you can just wire them together (which is what 4 to 3 prong dryer adapters do anyway) and you should be charging at 5.88 kw (24 amps) not 3.8 so unless you get an EVSE that is set to 24 amps, your EVSE will try to pull 6.6 from the wall which would be not good.

EVSE's come in all sizes. Clipper Creek is a good option simply because it offers all power levels with just about any plug you want.
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 14,342.8 mi, 93.16% SOH
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

DaveinOlyWA
Posts: 15147
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: Installing 4-prong charger on 3-wire 240V distribution

Fri Aug 21, 2020 7:57 am

LeftieBiker wrote:
Thu Aug 20, 2020 6:10 pm
If we limit charging to 3.6 kW and make sure we're not using the dryer at the same time, the 30-amp circuit is more than adequate.
I had a thought while I was away from the site: I'm wondering how you are doing this with the Nissan supplied dual voltage charging cable, which is NOT adjustable...
He isn't and you are right. The EVSE will try to pull 6.6 KW so he needs to get something else. Clipper Creek has a full line of options available.
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 14,342.8 mi, 93.16% SOH
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

Oilpan4
Posts: 1767
Joined: Wed Jan 09, 2019 10:51 pm
Delivery Date: 10 May 2018
Leaf Number: 004270

Re: Installing 4-prong charger on 3-wire 240V distribution

Fri Aug 21, 2020 7:44 pm

The easiest answer is to get a charger that has the same 3 prong plug as your receptacle.
Might be limited to 4.8 to 5.7kw.
But I find 3.6kw is plenty and I run up 900 to 1,600 miles per month, trumpvirus or no trumpvirus on my leaf with 0 public charging.
"THE ABOVE POST CONTAINS MISLEADING AND INACCURATE INFORMATION. PLEASE CONSIDER IT OPINION, NOT FACT". -someone who I offended and is unable to produce the facts in question.

User avatar
Nubo
Posts: 5799
Joined: Fri May 28, 2010 11:01 am
Delivery Date: 31 Oct 2014
Location: Vallejo, CA

Re: Installing 4-prong charger on 3-wire 240V distribution

Fri Aug 21, 2020 7:50 pm

The ground/neutral discussion is getting ahead of things. As far as I'm aware, "tapping" a 240V circuit is not allowed at all by code. A 240V breaker is meant to protect one, and only one load. Saying "we'll be careful" is not sufficient.
I noticed you're still working with polymers.

LeftieBiker
Moderator
Posts: 15735
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Installing 4-prong charger on 3-wire 240V distribution

Fri Aug 21, 2020 7:54 pm

Nubo wrote:
Fri Aug 21, 2020 7:50 pm
The ground/neutral discussion is getting ahead of things. As far as I'm aware, "tapping" a 240V circuit is not allowed at all by code. A 240V breaker is meant to protect one, and only one load. Saying "we'll be careful" is not sufficient.
The way to handle this is with a Either/Or switch that allows only one of two loads to be on the circuit at any one time.

There is also a way to kinda-sorta comply with the NEC on this charging setup - emphasis on the "kinda": don't charge for more than 2 1/2 hours at a time. This complies with the spirit of the 80% load rule, if not the letter. The problem is that unless you set a charge timer every time, or use an outlet timer of some sort, you are bound to forget to unplug after 150 minutes eventually.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

Oilpan4
Posts: 1767
Joined: Wed Jan 09, 2019 10:51 pm
Delivery Date: 10 May 2018
Leaf Number: 004270

Re: Installing 4-prong charger on 3-wire 240V distribution

Fri Aug 21, 2020 8:00 pm

Nubo wrote:
Fri Aug 21, 2020 7:50 pm
The ground/neutral discussion is getting ahead of things. As far as I'm aware, "tapping" a 240V circuit is not allowed at all by code. A 240V breaker is meant to protect one, and only one load. Saying "we'll be careful" is not sufficient.
Depends on the type of circuit.
Any home appliance or evse circuit, no. 1 breaker, 1 unbroken run of wire to 1 receptacle. There are listed exceptions to appliances being tapped for 120v receptacles but these are rare.
"THE ABOVE POST CONTAINS MISLEADING AND INACCURATE INFORMATION. PLEASE CONSIDER IT OPINION, NOT FACT". -someone who I offended and is unable to produce the facts in question.

Oilpan4
Posts: 1767
Joined: Wed Jan 09, 2019 10:51 pm
Delivery Date: 10 May 2018
Leaf Number: 004270

Re: Installing 4-prong charger on 3-wire 240V distribution

Fri Aug 21, 2020 8:15 pm

LeftieBiker wrote:
Fri Aug 21, 2020 7:54 pm
Nubo wrote:
Fri Aug 21, 2020 7:50 pm
The ground/neutral discussion is getting ahead of things. As far as I'm aware, "tapping" a 240V circuit is not allowed at all by code. A 240V breaker is meant to protect one, and only one load. Saying "we'll be careful" is not sufficient.
The way to handle this is with a Either/Or switch that allows only one of two loads to be on the circuit at any one time.

There is also a way to kinda-sorta comply with the NEC on this charging setup - emphasis on the "kinda": don't charge for more than 2 1/2 hours at a time. This complies with the spirit of the 80% load rule, if not the letter. The problem is that unless you set a charge timer every time, or use an outlet timer of some sort, you are bound to forget to unplug after 150 minutes eventually.
The definition of continuous depends on the load up to 3 hours I know is used for lighting and heating circuits but the term continuous can mean as little as 20 minutes on appliances, such as an evse.
Ultimately code comes down to what what the inspector will and will not sign off on.
My professionally designed completely legal state inspected solar power generation system is actually not up to code because you can only back feed 20% of what a panel is rated for. My name plate is 9.5kw, 30 actual amps are back fed into a 125 amp panel. That 125 amp panel with 30 amps going back technically, according to NEC is over loaded.
But the state inspector signed off on it, but not worried about it and I'm highly proficient in this line of work. I installed that 125 amp panel to back feed a 3 or 4 kw name plate system, not 9.5kw.
"THE ABOVE POST CONTAINS MISLEADING AND INACCURATE INFORMATION. PLEASE CONSIDER IT OPINION, NOT FACT". -someone who I offended and is unable to produce the facts in question.

Return to “Website/Forum Discussions”