WetEV
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Re: Level 2 charger

Fri Sep 14, 2018 4:29 am

tomofNV wrote:The 30A outlets I used to charge at RV parks 5-9 years ago in my converted car were 240V, verified by my energy meter which reads out AC voltage, current, power, and accumulated energy. I don't know much about RVs themselves.


Are you sure these were not 50 Amp outlets? Almost all RVs use TT-30 or NEMA_14-50.

https://en.wikipedia.org/wiki/NEMA_connector#NEMA_TT-30

Image

Three connectors: Hot, neutral and ground.

Most RVs are wired for 120V 30 Amp. Large RVs use 240V 50A.

https://en.wikipedia.org/wiki/NEMA_connector#NEMA_14

Image

Four connectors: Hot phase x, Hot phase y, neutral and ground.
#49 on the LEAF 100 mile club.
Most everything around here is wet during the rainy season. And the rainy season is long.
2012 Leaf SL Red
2014 Leaf SL Red
Can't sit in a Bolt seat, hoping for better soon.
Or perhaps a Buick version? Buick Electra 225???

SparkE
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Location: SF Bay Area

Re: Level 2 charger

Fri Sep 14, 2018 5:27 am

http://www.myrv.us/electric/Pg/30amp_Service.htm


30 Amp, 240V "Old Style" electric dryer plug, circa 1960s-1970s (NEMA 10-30) - 3 holes, one is an 'L' shape :

Image


30 Amp, 120V RV socket, (TT-30) - 3 holes, NO 'L' :
Note that you should never exceed 80% of 'rated' amps, so a max of 24 amp constant load on this one.

Image


50 Amp, 240V electric oven (and RV) socket, (NEMA 14-50) - 4 holes :

Image


And for the hell of it, 30A/240V "New Style" electric dryer socket, (NEMA 14-30) - 4 holes, one is an 'L' shape :
These are found in some garages. Note that you should never exceed 80% of 'rated' amps, so a max of 24 amp EVSE on this one.

Image

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Image

tomofNV
Posts: 7
Joined: Thu Sep 13, 2018 5:31 pm

Re: Level 2 charger

Fri Sep 14, 2018 4:21 pm

I usually used a 50A site, NEMA 14-50, but a few times those were all taken so I used a 30A site, and it was 240 VAC. Maybe not common, dunno. Only used one at one RV park.

broosth
Posts: 16
Joined: Sun Aug 19, 2018 4:32 am

Re: Level 2 charger

Thu Oct 25, 2018 12:30 am

Slightly off topic question: I read on another website that the US stock EVSE can be operate safely on 240 v, with a proper plug adapter, delivering 12 amp at 240 v for double the charge rate (not Level 2, but faster than 120 v). That makes sense to me, BUT the nameplate only says 120 v. That is, of course, true with the stock plug.

Does anyone have an official Chevy reference that says 240 v is OK?

SparkE
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Re: Level 2 charger

Thu Oct 25, 2018 2:48 am

There is no "official GM reference" for it, but it does work. Several people here have used it so (with a "converter pigtail"). If you look through the site, you should quickly find a description of how it works (and maybe why). Search for 'pigtail'.


broosth
Posts: 16
Joined: Sun Aug 19, 2018 4:32 am

Re: Level 2 charger

Thu Oct 25, 2018 4:10 am

Thank you for those links. They did not show up in the search I did. My caution relates to the warning here:

http://evseupgrade.com/?main_page=faq_i ... faqs_id=24

I do understand that they are not specifically referring to the EVSE Chevrolet ships.

winterescape
Posts: 151
Joined: Sun Jun 25, 2017 1:35 pm
Location: Upstate, NY

Re: Level 2 charger

Sat Oct 27, 2018 4:51 pm

broosth wrote:Thank you for those links. They did not show up in the search I did. My caution relates to the warning here:

http://evseupgrade.com/?main_page=faq_i ... faqs_id=24

I do understand that they are not specifically referring to the EVSE Chevrolet ships.


Correct. They are in the business of removing and replacing the input cord, and would like to protect that business. In addition, as you point out, they are discussing a circa 2011 Nissan EVSE, which I have not seen the internals of.

We do know what the internals are for the 2017 and 2018 GM Volt / Bolt included EVSE. Pictures shown here. (Potentially 2019 too, but I have not yet seen verification of the same GM part number EVSE )

http://imgur.com/a/vFkP5

From the pictures, and the great work done by this individual, we can conclude:
1) GM sourced the PCB from Clippercreek
2) GM desired a single part number PCB that could be sold worldwide and used from 90-265VAC.
3) The input components are rated for "high line" AC (Up to 265VAC)
4) Many folks have made or purchased "pigtail" adapters and are currently using them.

Although removing the cord and replacing it is an option, I am not crazy about that as there is no indication they use a thermal sensor in the new cord to detect overheating, caused by a bad connection. The best solution would have been for GM to have put a 220V plug on the included EVSE and also included a 120V plug adapter, IMHO.

https://gm-volt.com/forum/showthread.ph ... on-Capable

broosth
Posts: 16
Joined: Sun Aug 19, 2018 4:32 am

Re: Level 2 charger

Sat Oct 27, 2018 10:27 pm

It would have been great if they had equipped it with replaceable plugs as Tesla does, or at least a 240 v plug and provide a pigtail for 120.

One thing I have not found is the actual wiring for the four contacts of, say, a Nema 14-50 to the three pins of the 120 v plug. I should be able to guess, but guessing is a good way to ruin it.

BoltDriver29
Posts: 9
Joined: Sun Oct 28, 2018 2:07 am

Re: Level 2 charger

Sun Oct 28, 2018 2:27 am

One thing I have not found is the actual wiring for the four contacts of, say, a Nema 14-50 to the three pins of the 120 v plug. I should be able to guess, but guessing is a good way to ruin it.


I just completed the task of making a pigtail for 14-50 to 3 pin 120v. I thought I'd do it the 'easy way' and buy a pre-made oven plug. That was a mistake. The oven plug uses #8 wire and I failed to realize that I don't need #8 wire on the pigtail. At least not on a pigtail that is for 220v in my house that is going to connect to the portable charger that came with the Bolt. Since the portable charger maxes out at 12a then you should be able to use #10 wire and that would have fit very well into the 3 pin socket I used.

So the #8 wire did not connect very easily to the 120v 3 pin 20a socket I attached.

For the price of that pre-made oven wire and a 20a socket I would have been better off buying "Adapter A - NEMA 14-XX plug to NEMA L6-20 receptacle" from quickchargepower.com

You don't need the neutral for the connection. Connect the ground and 2 hots. And if you look at the product I referenced above you will see the neutral prong missing in the photo.

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