Re: [EVDL] Adapting L1 to 14-50 receptacle

[Chris Tromley via EV]

On Tue, Feb 28, 2017 at 10:22 PM, Roger Stockton via EV 
wrote:

> Chris Tromley wrote:
>
> However, you will *not* pull 3kW from anything ;^>
>

​D'oh!  [slaps forehead]

Of course Roger and Cor are both right.  I guess I'm just giddy from using
my recently-installed JuiceBox L2 charger and finally getting my full 3.3
kW potential.​

I might actually be tempted to diddle with the internals of my brick to
soup it up, except for the mechanicals involved.  It appears to have been
made with a snap-together case, which can be very easy to destroy if you
don't know beforehand how the snaps work.  Sometimes they're designed so
they can't be undone without breaking something.  An L1 brick with
compromised weatherproofing isn't worth much.  (At least not for long.)

But that won't stop me from poking at it carefully to see if I can open
it.  Thanks guys!

Chris
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Re: [EVDL] Adapting L1 to 14-50 receptacle

[Cor van de Water via EV]

Chris,
Two things:

1. modifying the plug on the 110V trickle charger to plug into the 110V of a 
NEMA 14-50 will *not* make a difference, your iMiev will still charge at the 
same rate as with the standard NEMA 5-15 plug. Reason is that the EVSE tells 
the LiMiev to draw 12A and that is what the car does.

2. There are ways to trick the trickle charger into supplying 240V to the car, 
while it will still tell the car to draw 12 Amp (because the cord and plug 
cannot handle more) but now that same 12A is twice the power due to the double 
voltage, allowing the car to charge twice as fast.

There are two ways to modify the charger:

1, (as you already hinted at) it may be that the charger's power supply can 
actually handle 240VAC but you need to verify that. I inspected my Leaf's 
chargers (two different models) and each accepted only 120V.One actually has a 
switching power supply but I noticed the bulk capacitor had a 250V rating and 
240VAC results in about 350V after rectification, so that was a no-go. The 
other charger had a 120V transformer and I had enough space in the second 
charger to fit a small switching universal power supply that I modified the 
output voltage to the minimum 15V that the charger needed (the transformer 
actually supplied 20V but the minimum was 15V)
The first charger is too slim to fit an extra power supply, so we move on to 
the other way:

2. Attach a 4-prong plug and wire to the charger, wire the 120V (neutral and 
one phase) to the input of the charger. Inspect the charger to find the output 
relays. Disconnect (cut) the wire going to the output relay that is feeding the 
Neutral to the output cord and run the second input phase to this output relay, 
so when the charger engages, it sends 240V to the car instead of 110V. This is 
also the modification to the Leaf charger that is described in an Instructable:
<http://www.instructables.com/id/CONVERTING-A-LEAF-LEVEL-1-12AMP-CHARGER-TO-A-LEVEL/>


Cor van de Water 
Chief Scientist 
Proxim Wireless 
  
office +1 408 383 7626Skype: cor_van_de_water 
XoIP   +31 87 784 1130private: cvandewater.info 

http://www.proxim.com

This email message (including any attachments) contains confidential and 
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-Original Message-
From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Chris Tromley via EV
Sent: Tuesday, February 28, 2017 6:18 PM
To: Electric Vehicle Discussion List
Subject: [EVDL] Adapting L1 to 14-50 receptacle

​My used iMiEV came with a no-name L1 charging brick.  I mean literally no
name - there's no ID on the thing, only an ETL logo and some minimal
instructions zip-tied to the power cord.  It does clearly say 120 VAC,
which surprised me.  I thought these things generally had universal input.​

I'm trying to broaden my opportunity charging opportunities, and there is a
Tesla store in a mall in my area that has a charging area in the parking
garage.  Apparently Teslas use a 14-50 (RV or electric range) outlet in
addition to their proprietary port and they have several available.  (And
the plugshare blurb shows a Leaf charging there, so it looks like they're
OK with that.  But yes, I'll ask.)

So here's my question.  A 14-50 has a neutral, so I'm pretty sure I can
adapt my brick to it by simply tapping one leg of the 240 V.  Is there
anything subtle that I'm missing?  Like if there are a bunch of these
outlets fed by a single panel and I pull 3 kW off one leg of one, is that
an issue?  Anything else?

I'm thinking it'll be fine, but I'm not comfortable deciding that on my
own.  (Such is the challenge of being an electrical dolt in an EV world.)

TIA,
Chris
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Re: [EVDL] Adapting L1 to 14-50 receptacle

[Roger Stockton via EV]

Chris Tromley wrote:

> So here's my question.  A 14-50 has a neutral, so I'm pretty sure I can
> adapt my brick to it by simply tapping one leg of the 240 V.  Is there
> anything subtle that I'm missing?  Like if there are a bunch of these
> outlets fed by a single panel and I pull 3 kW off one leg of one, is that
> an issue?  Anything else?

You should be fine using an adapter to take one hot, neutral, and earth ground 
from the 14-50 to a 5-15 receptacle to plug your L1 opportunity charge cord 
into.

However, you will *not* pull 3kW from anything ;^>

Your L1 charge cord is 120V input only, and almost certainly is configured 
internally to generate a pilot signal to the EV that tells it not to draw more 
than the 12A continuous rating of a 5-15 outlet (assuming your charge cord has 
a NEMA 5-15 plug on the wall end, and has not been hacked).

So, as long as you only feed it 120VAC you should not fry anything inside of 
it, and unless it has been hacked to generate a pilot signal for a higher 
current, your EV will not draw more than 12A from the wall when you use this 
charge cord, no matter what the capacity of the circuit you plug into.

Hope this helps,

Roger.

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[EVDL] Adapting L1 to 14-50 receptacle

[Chris Tromley via EV]

​My used iMiEV came with a no-name L1 charging brick.  I mean literally no
name - there's no ID on the thing, only an ETL logo and some minimal
instructions zip-tied to the power cord.  It does clearly say 120 VAC,
which surprised me.  I thought these things generally had universal input.​

I'm trying to broaden my opportunity charging opportunities, and there is a
Tesla store in a mall in my area that has a charging area in the parking
garage.  Apparently Teslas use a 14-50 (RV or electric range) outlet in
addition to their proprietary port and they have several available.  (And
the plugshare blurb shows a Leaf charging there, so it looks like they're
OK with that.  But yes, I'll ask.)

So here's my question.  A 14-50 has a neutral, so I'm pretty sure I can
adapt my brick to it by simply tapping one leg of the 240 V.  Is there
anything subtle that I'm missing?  Like if there are a bunch of these
outlets fed by a single panel and I pull 3 kW off one leg of one, is that
an issue?  Anything else?

I'm thinking it'll be fine, but I'm not comfortable deciding that on my
own.  (Such is the challenge of being an electrical dolt in an EV world.)

TIA,
Chris
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