knightmb
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Re: Dryer Plug Adapter for Leaf 2020 Plus EVSE

Wed Mar 24, 2021 8:21 pm

goldbrick wrote:
Wed Mar 24, 2021 7:12 pm
Even modern panels can fill up. I just put in a new panel and I used a 'plug-in neutral' type panel. This has 2 bus bars that each breaker snaps onto: a hot and the neutral. This eliminates the pigtails required on AFCI breakers. I don't think this type of breaker is made in 'half-size' so each slot can fit only 1 breaker and when the panel is full, it's full.
To add more confusion, they do make half-size breakers that fit between the two slots to make a 240 V connection and then you can put half-size breaks on either side of those to get more 120 V connections, but the box itself has to have the extra "legs" to grab a hold of for those half-size breakers and thus basically end up getting a new box anyway unless you are starting new... :shock:
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wwhitney
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Re: Dryer Plug Adapter for Leaf 2020 Plus EVSE

Wed Mar 24, 2021 9:37 pm

My two cents:

The only safe and reliable way to power the Nissan EVSE at 240V is with a minimum 40 amp circuit. [I've not actually dealt with one myself, that's what I understand from the specs.]

With a non-deficient 30 amp dryer circuit, it would be safe to try the Nissan EVSE on it, it just would not be reliable. There's a good chance the breaker would trip. And even if it doesn't for several charge sessions, it might trip the next time the weather is warmer, say.

What would be unsafe would be to continue using the circuit for the EVSE after finding out that the breaker trips sometimes, and to just keep resetting the breaker. That may turn it into a deficient circuit by wearing out the breaker. And of course if the circuit were deficient, using it would be unsafe for an EVSE or a dryer.

Cheers, Wayne

sdbmania
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Re: Dryer Plug Adapter for Leaf 2020 Plus EVSE

Wed Mar 24, 2021 11:01 pm

wwhitney wrote:
Wed Mar 24, 2021 9:37 pm
My two cents:

The only safe and reliable way to power the Nissan EVSE at 240V is with a minimum 40 amp circuit. [I've not actually dealt with one myself, that's what I understand from the specs.]

With a non-deficient 30 amp dryer circuit, it would be safe to try the Nissan EVSE on it, it just would not be reliable. There's a good chance the breaker would trip. And even if it doesn't for several charge sessions, it might trip the next time the weather is warmer, say.

What would be unsafe would be to continue using the circuit for the EVSE after finding out that the breaker trips sometimes, and to just keep resetting the breaker. That may turn it into a deficient circuit by wearing out the breaker. And of course if the circuit were deficient, using it would be unsafe for an EVSE or a dryer.

Cheers, Wayne
Interesting. The car won't charge when using the dryer plug, the green light on the EVSE flashes, so I'm assuming it's the adapter or the outlet. I'll either look into getting a 24amp EVSE or have an electrician put in a new 50amp breaker and outlet. I got confused because last year I got some estimates on the cost and I got a quote from $350 to $425. When I contacted a new contractor recently, they suggested an adapter would be a better option. Right now I am leaning towards getting the 24amp EVSE.
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LeftieBiker
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Re: Dryer Plug Adapter for Leaf 2020 Plus EVSE

Wed Mar 24, 2021 11:28 pm

Electricians who don't install lot of EVSE circuits don't necessarily understand what's involved in the load calculation.
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Nubo
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Re: Dryer Plug Adapter for Leaf 2020 Plus EVSE

Thu Mar 25, 2021 1:51 am

Learjet wrote:
Wed Mar 24, 2021 5:48 pm
...
I haven't seen a modern panel yet that you can't make room with tandem breakers....unless your panel is really old...then you have a bigger issue.
It's sort of like a checkbook though. Just because there are blank checks doesn't mean your account can cover writing more of them. In addition to panel space, the overall load is also a factor. When we had a 240V circuit added, local permit required load calculation to be done. As it turned out load calculation determined we were limited to a 20A circuit unless we wanted to run a new service line or repurpose some other circuit (e.g., replace electric range with gas).
I noticed you're still working with polymers.

SageBrush
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Re: Dryer Plug Adapter for Leaf 2020 Plus EVSE

Thu Mar 25, 2021 4:25 am

sdbmania wrote:
Wed Mar 24, 2021 3:40 pm
I should add that when I tried plugging in the adapter, the EVSE was flashing the green light, but not the others.
Off-hand I don't know the meaning of your EVSE flashing lights (you can find out), but I do know that dryer circuits can be wired in different configurations. Add in an adapter, and then you really don't know the wiring into the EVSE.

IIRC (this has to verified by someone qualified), an EVSE running at 240v expects two hot pins and a ground, but no neutral.

----
If you are looking for a lower cost solution, you can also consider a used EVSE that is Amp limited for a 30 Amp circuit. Some EVSE are that way from the get go, and others let you set the EVSE to a maximum lower amperage. The basic problem with the Nissan mobile EVSE is that it does not have a way to set a lower maximum amperage.
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wwhitney
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Re: Dryer Plug Adapter for Leaf 2020 Plus EVSE

Thu Mar 25, 2021 7:08 am

sdbmania wrote:
Wed Mar 24, 2021 3:40 pm
I tried getting one but it's not working. It has a green cable coming out of it that is supposed to be for ground, but I thought the EVSE didn't need a grounding wire. If anyone could give me a recommendation on what kind of adapter I should get, I need a 10-30 to 14-50, I would appreciate it.
The EVSE does need an EGC, it just doesn't need a neutral. 10-30 is an ungrounded pattern, 2 hots and a neutral, while 14-50 is a grounded pattern, 2 hots, a neutral and an EGC. So your adapter is attempting to handle the general purpose case, where you can use the green wire to run to a properly grounded receptacle for an EGC. The EVSE is doing an EGC check, finding out there is none, and flashing its light as an error.

You will also find adapters marketed as for EVSEs that don't have the green wire. They will internally connect the 14-50 EGC to the 10-30 neutral. Which is a bit of a kludge, and potentially problematic if you used them for a 120V/240V load, rather than a straight 240V like an EVSE.

Since you have a 10-30 receptacle instead of a 14-30 receptacle, your dryer installation is on the old side. That would definitely give me pause about using an adapter in the long run, as I would not have confidence that the circuit didn't have unknown deficiencies. The prudent thing to do if you don't want to run a new circuit would be to get a 24 amp EVSE, preferably with a 6-30 plug, and have an electrician come out, inspect both ends of the circuit, and change the 10-30 receptacle to a 6-30 receptacle.

This entire discussion assumes the 10-30 receptacle is not currently used. If it's used by a dryer, forget it and run a new circuit.

Cheers, Wayne

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Re: Dryer Plug Adapter for Leaf 2020 Plus EVSE

Thu Mar 25, 2021 7:52 am

wwhitney wrote:
Thu Mar 25, 2021 7:08 am
The prudent thing to do if you don't want to run a new circuit would be to get a 24 amp EVSE, preferably with a 6-30 plug, and have an electrician come out, inspect both ends of the circuit, and change the 10-30 receptacle to a 6-30 receptacle.
YES. And clearly label the receptacle as 'EV only'
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11/18: 56.16 Ahr, 30k miles
09/20: 54.3 Ahr; 38k miles
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WetEV
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Re: Dryer Plug Adapter for Leaf 2020 Plus EVSE

Thu Mar 25, 2021 7:58 am

SageBrush wrote:
Thu Mar 25, 2021 7:52 am
wwhitney wrote:
Thu Mar 25, 2021 7:08 am
The prudent thing to do if you don't want to run a new circuit would be to get a 24 amp EVSE, preferably with a 6-30 plug, and have an electrician come out, inspect both ends of the circuit, and change the 10-30 receptacle to a 6-30 receptacle.
YES. And clearly label the receptacle as 'EV only'
Its a good idea, but why EV only?
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SageBrush
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Re: Dryer Plug Adapter for Leaf 2020 Plus EVSE

Thu Mar 25, 2021 8:01 am

WetEV wrote:
Thu Mar 25, 2021 7:58 am
SageBrush wrote:
Thu Mar 25, 2021 7:52 am
wwhitney wrote:
Thu Mar 25, 2021 7:08 am
The prudent thing to do if you don't want to run a new circuit would be to get a 24 amp EVSE, preferably with a 6-30 plug, and have an electrician come out, inspect both ends of the circuit, and change the 10-30 receptacle to a 6-30 receptacle.
YES. And clearly label the receptacle as 'EV only'
Its a good idea, but why EV only?
So that no one tries to use an adapter to run an appliance that requires a neutral
2013 LEAF 'S' Model with QC & rear-view camera
Bought Jan 2017 from N. California
Two years in Colorado, now in NM
03/18: 58 Ahr, 28k miles
11/18: 56.16 Ahr, 30k miles
09/20: 54.3 Ahr; 38k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

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