LeftieBiker
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Re: What size Breaker at the Box should i use for a Plus Model Leaf?

Tue Jan 21, 2020 7:51 pm

27.5 amps. There could, possibly, be an issue with a 30A EVSE on a 50A breaker, in that if the EVSE is faulty and starts to overheat, the breaker might not trip soon enough to prevent a fire.
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danrjones
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Re: What size Breaker at the Box should i use for a Plus Model Leaf?

Tue Jan 21, 2020 8:49 pm

LeftieBiker wrote:
Tue Jan 21, 2020 7:51 pm
27.5 amps. There could, possibly, be an issue with a 30A EVSE on a 50A breaker, in that if the EVSE is faulty and starts to overheat, the breaker might not trip soon enough to prevent a fire.
I was having a discussion the other day with a coworker about how code now requires AFCI breakers in many areas INSIDE the house. In theory AFCI will detect something like this because of the frequency shift of a short or arc as opposed to a standard breaker which wouldn't notice a problem. I have not heard that AFCI's are required for EV chargers but it might not be a bad idea?
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johnlocke
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Re: What size Breaker at the Box should i use for a Plus Model Leaf?

Tue Jan 21, 2020 10:01 pm

For a Nissan Leaf EVSE dedicated circuit, a 40 amp breaker is the right solution. It's large enough to prevent nuisance trips but low enough to trip if there's a problem. If you wire it to a 14-50 outlet, use 6g wire just in case somebody decides to replace the 40 amp breaker with a 50 amp breaker. You could use 8g THHN at 50 amps by code although some inspectors would call you on it. Use the 6g and spend a couple of more bucks just for safety's sake.

There used to be 40a range plugs but I can't find a listing for them anymore, Everything is either 30a or 50a. Go with a 14-50 since it's the most common. A 30a outlet would only work for a 24a draw or less by code unless you can charge for less then 3 hours at a time. Just use the 14-50.
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radiotron
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Re: What size Breaker at the Box should i use for a Plus Model Leaf?

Wed Jan 22, 2020 6:17 am

thanks for all the Help From everybody lots of different opinions
If i was to purchase a new charing station what would be recommended
in todays market to buy for a Leaf Plus? Mounted Outside on the House
I do not have a Garage so the car is always outside

Flyct
Posts: 381
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Leaf Number: 310009
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Re: What size Breaker at the Box should i use for a Plus Model Leaf?

Wed Jan 22, 2020 8:22 am

radiotron wrote:
Tue Jan 21, 2020 6:10 pm
My Charging unit did not come with the car
Its a Unit sold By Nissan Dealers Separately i bought it used and have no Paperwork for it
I ran 220-240 Line For It From The 200 Amp Service In The Basement
To the charging unit It with the Proper wire i bought at an electrical supply outlet
The wire alone was over $200.00 to buy in 2015 Its Orange My Charger
Is outside the Next to the Back Door Of My walk in Basement Mounted On the House
I have used it for 5 years with No Problems i was just asking a simple question about
Breaker size and thought the Plus Models needed a bigger Breaker Thats all
I'm not an electrician but have done a lot of wiring in my Homes
Previous and Current Homes that i have lived in no worries i will figure it out
Thanks all
If the wire is Orange NM-B “Romex” it’s likely 10-3 NM-B. #10 wire is limited to 30 amps. YOU CAN’T JUST REPLACE THE BREAKER WITH A 50 AMP BREAKER.

I believe that your Nissan wall mounted round EVSE draws 24 amps. It should charge about 19 miles of range for each hour plugged in. You should be fine with it charging a Plus for overnight charging. It would only take one hour extra overnight to fully charge a plus that’s down to 10% charge remaining, compared an EVSE that requires 50 amps.

For a short while I was using a 30 amp Clipper Creek for my plus until the Clipper Creek died. The extra time to fully charge overnight compared to a 50 amp unit was negligible.

Save your money and keep your current Nissan Branded Round White “charger” EVSE.
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Oilpan4
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Re: What size Breaker at the Box should i use for a Plus Model Leaf?

Wed Jan 22, 2020 9:03 am

THHN wire has to be ran in conduit.
It is uncommon to run THHN wire smaller than 4 gauge in residential.
LeftieBiker wrote:
Tue Jan 21, 2020 7:51 pm
27.5 amps. There could, possibly, be an issue with a 30A EVSE on a 50A breaker, in that if the EVSE is faulty and starts to overheat, the breaker might not trip soon enough to prevent a fire.
That's not how it works. The breaker is there to protect the wire not what you plug in.
Furthermore it's against code to put something other than a breaker rated the same as the receptacle on the other end.
The only exceptions are residential branch circuits, welding equipment circuits and a few other very specific listed and limited uses.
"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
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Re: What size Breaker at the Box should i use for a Plus Model Leaf?

Wed Jan 22, 2020 9:11 am

Flyct wrote:
If the wire is Orange NM-B “Romex” it’s likely 10-3 NM-B. #10 wire is limited to 30 amps. YOU CAN’T JUST REPLACE THE BREAKER WITH A 50 AMP BREAKER.
Yeah you really don't want to do that
I got to rip out all the branch circuits out of a house before when the people living there replaced the 20 amp breakers with 30s I'm assuming it was so they could plug in more space heaters with out tripping breakers as the house had no central heating. They burned up a good portion of the wiring in the walls.
Some how the house didn't burn down.
"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.

danrjones
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Re: What size Breaker at the Box should i use for a Plus Model Leaf?

Wed Jan 22, 2020 1:06 pm

Oilpan4 wrote:
Wed Jan 22, 2020 9:03 am
THHN wire has to be ran in conduit.
It is uncommon to run THHN wire smaller than 4 gauge in residential.
LeftieBiker wrote:
Tue Jan 21, 2020 7:51 pm
27.5 amps. There could, possibly, be an issue with a 30A EVSE on a 50A breaker, in that if the EVSE is faulty and starts to overheat, the breaker might not trip soon enough to prevent a fire.
That's not how it works. The breaker is there to protect the wire not what you plug in.
Furthermore it's against code to put something other than a breaker rated the same as the receptacle on the other end.
The only exceptions are residential branch circuits, welding equipment circuits and a few other very specific listed and limited uses.
Either way, as my car sits outside, it makes little difference to me. If the car or charger cord catches fire my house should be fine and I'll get to go shopping for a new EV. I can live with that!

IF and WHEN I move my EV inside my garage and put in a second 14-50 plug INSIDE my garage I'll spend the extra $50 and use a AFCI breaker. That should take care of the arc/fault risk of the charger.
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GerryAZ
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Re: What size Breaker at the Box should i use for a Plus Model Leaf?

Wed Jan 22, 2020 1:26 pm

radiotron wrote:
Tue Jan 21, 2020 11:40 am
I have A Nissan Charger 220 volts that the dealers used to sell
I have had it for 5 years and use a dedicated 220 line from the Circut breaker box
with a 30 amp Breaker it worked Fine on my 2015 leaf
Now that i have a Leaf Plus should i Install a 50 amp breaker
To speed up the charging??
The EVSE unit you have was made for Nissan by AeroVironment. It is rated for 240 volts and 30 amperes. They were rather expensive back in 2011, but they are good UL Listed units that work fine on either 208- or 240-volt circuits. I have been using mine since June 2011. The unit should be supplied from a 40-ampere, non-GFCI, 2-pole circuit breaker with No. 8 AWG or larger copper wire. The unit tests the continuity of the ground conductor by injecting a small current so it will instantly trip a standard GFCI breaker. The pilot signal is not adjustable so there is no reason to use a different breaker size.

My 2019 SL+ charges at slightly higher current than my 2015 SL, but still less than 30 amperes at 240 volts so the AeroVironment unit allows enough current to get maximum charge rate at home. Of course, the 2019 takes longer to charge if it is deeply discharged than the 2015 because it stores a lot more energy.
Gerry
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salyavin
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Location: Littleton , CO

Re: What size Breaker at the Box should i use for a Plus Model Leaf?

Wed Jan 22, 2020 5:02 pm

I noticed his charger is outside his garage. That could be helpful to help an EV user in trouble near by (not common these days inside a city) but I wonder has anyone walked up and simply unplugged and taken (stolen) a charger to go sell on ebay? Maybe I am paranoid.

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