MikeD
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Re: Plug-in EVSE - safer to leave it plugged in all the time, or should I unplug/plug every day?

Sat Jul 21, 2018 11:27 am

Kieran973: I just looked at Clipper Creek's info on the LCS-20/LCS-20P that you referred to and noticed that their available plugin versions provide for only the following 4 plugs: NEMA 6-50, 14-50, L6-30, and 14-30

It does not provide a 6-20 version, which I find curious, which I would think is the appropriate plug for you (if you decide plugin). I did see a post from 2016 from someone who installed a NEMA 6-20P on their LCS-20P and stated they had no problem with it. I will try to ask Monday if there is a good reason for no 6-20 option.

BTW note that all lock plugs (like L6-30) are prohibited in the current NEC.

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Nubo
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Re: Plug-in EVSE - safer to leave it plugged in all the time, or should I unplug/plug every day?

Sat Jul 21, 2018 11:38 am

Kieran973 wrote:...I realize there are much faster L2 charging options, but the wiring on the dedicated circuit is only 20 amps and I'd rather not pay for a brand new circuit (especially since I don't own this place), hence the merely 16 amp EVSE. Do other people on MNL charge at 16 amps on a 20 amp circuit? This would be for a 2018 Leaf. I'd probably charge twice a week, between midnight and 8 am, for 6-7 hours at a time. Thanks.


I've been charging at 240V/16A since 2012. At the time that was the max rate for LEAF. More importantly it was as high as we could go without serious expense. In any case, 16A has been more than adequate. And I think larger pack sizes actually reduce the need for higher at-home charging rates. But of course it depends on your particular situation. For example, someone who drives a lot and has a time-of-use electric plan could use a faster charge rate to place more of their charging in the cheaper TOU window.

As far as unplugging an EVSE, ours has a plug and every few months I will unplug it and plug it back in. The idea being that this helps wipe oxidation off the contacts, while keeping the lifetime plug/unplug cycles low enough that wear is not a concern.
I noticed you're still working with polymers.

jjeff
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Re: Plug-in EVSE - safer to leave it plugged in all the time, or should I unplug/plug every day?

Sat Jul 21, 2018 2:23 pm

Here's one with a 6-20 plug good for 16a. Note these EVSEs are generally 120v/208/240v compatible so it would work on 120v and also 240v if you go that route by simply replacing the plug or making a plug adapter. It says UL "recognized" and has a nice long(23 or 29 1/2' cord).
https://www.amazon.com/OrionMotorTech-E ... ev+charger
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

Kieran973
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Re: Plug-in EVSE - safer to leave it plugged in all the time, or should I unplug/plug every day?

Sat Jul 21, 2018 9:27 pm

All great points, everyone. Thanks.

MikeD: why do you think that a NEMA 6-20 outlet is the best one?

I'm still not sure whether to go with hardwired or plug-in. Since it will be an outdoor EVSE, mounted on the exterior wall of the building, a hardwired EVSE seems safer. Clipper Creek recommends hardwired for outdoor EVSEs, but then, confusingly, their plug-in units are rated for outdoor use. Plus, I rent this place and it would be nice to be able to take the EVSE with me when I move, to not just abandon the whole EVSE when my lease is up. Is it really less safe to get a plug-in and just put the outlet inside a waterproof box?

Of course, I'll have to explore whether the 20 amp line is 120V or 240V (as others pointed out), and then see how this affects my options....

wwhitney
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Re: Plug-in EVSE - safer to leave it plugged in all the time, or should I unplug/plug every day?

Sat Jul 21, 2018 9:53 pm

If it is easier, there's no problem installing a 6-30 receptacle as the only load on a dedicated 20 amp circuit. For a single outlet circuit, the only requirement is that the receptacle rating should not be less than the circuit rating.

Cheers, Wayne

MikeD
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Re: Plug-in EVSE - safer to leave it plugged in all the time, or should I unplug/plug every day?

Sun Jul 22, 2018 5:23 pm

Kieran973: The NEC states MINIMUM requirements, many of which are quite complex -- and without explanation (although the NEC Handbook -- and other sources -- attempt with varying success towards its better understanding). And these requirements can change over time, especially in regards to evolving technology like EVSEs.

Although as best as I can tell, wwhitney's single receptacle reading of the current NEC is correct, to me it makes good sense to go BEYOND NEC, especially if I feel assured of better safety through increased simplicity and understanding.

I very much like the concept that if my device's plug fits into a receptacle (especially one that is on a dedicated circuit), then I can feel confident the circuit will have the capacity of safely supplying the required load to that device. So, for example, using a 50a rated receptacle/plug, say NEMA 14-50, for a 20a EVSE on a 20a circuit eliminates that confidence for that receptacle -- and confuses the load requirements of the device as well (although one can argue that it allows the EVSE to also be used at RV camps where 14-50R is commonly available).
Last edited by MikeD on Sun Jul 22, 2018 5:34 pm, edited 1 time in total.

wwhitney
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Re: Plug-in EVSE - safer to leave it plugged in all the time, or should I unplug/plug every day?

Sun Jul 22, 2018 5:28 pm

MikeD wrote:I very much like the concept that if my device's plug fits into a receptacle (especially one that is on a dedicated circuit), then I can feel confident the circuit will have the capacity of safely supplying the required load to that device.

Please note that for a typical receptacle circuit, this expectation is not met. It is easy to plug in two 1800W loads on the same 15A or 20A receptacle circuit, and the circuit will not have enough capacity. So whenever plugging in a high power load, it is important to know more about the circuit than just the receptacle configuration.

Cheers, Wayne

MikeD
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Re: Plug-in EVSE - safer to leave it plugged in all the time, or should I unplug/plug every day?

Sun Jul 22, 2018 5:45 pm

wwhitney: Aren't we talking about dedicated receptacle circuits? The NEC has different rules for non-dedicated receptacles, where I think you will agree the ratings of the circuit and the receptacles are required to coincide or nearly so, which makes a lot more sense? I basically agreed with you, I don't understand your nit-picking about a simple multi-receptacle overloading issue (not being addressed here) that everyone should already have a clear understanding of?

GlennD
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Re: Plug-in EVSE - safer to leave it plugged in all the time, or should I unplug/plug every day?

Sun Jul 22, 2018 7:11 pm

MikeD wrote:Kieran973: I just looked at Clipper Creek's info on the LCS-20/LCS-20P that you referred to and noticed that their available plugin versions provide for only the following 4 plugs: NEMA 6-50, 14-50, L6-30, and 14-30

It does not provide a 6-20 version, which I find curious, which I would think is the appropriate plug for you (if you decide plugin). I did see a post from 2016 from someone who installed a NEMA 6-20P on their LCS-20P and stated they had no problem with it. I will try to ask Monday if there is a good reason for no 6-20 option.

BTW note that all lock plugs (like L6-30) are prohibited in the current NEC.


It is the typical Chinese unit lacking GFCI. Using UL recognized components means nothing. The entire unit has to be recognized. As I understand it even making the unit plug in when it was tested for direct wire in means another test..
2012 Cayenne Red SL traded for:
2013 Pearl White SL Premium
Traded for a Cirrus White 2014 Mercedes B (totaled)
2016 Urano Gray eGolf SEL w/ drive assist
Loved the VW but it sat too low for my old body
Back to a Cirrus White 2017 B250e

GlennD
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Re: Plug-in EVSE - safer to leave it plugged in all the time, or should I unplug/plug every day?

Sun Jul 22, 2018 7:23 pm

I wonder. LA requires UL approved EVSE's. The Tesla is favored by many Hollywood High Rollers. How do they charge the cars when the supplied EVSE is not UL approved?
2012 Cayenne Red SL traded for:
2013 Pearl White SL Premium
Traded for a Cirrus White 2014 Mercedes B (totaled)
2016 Urano Gray eGolf SEL w/ drive assist
Loved the VW but it sat too low for my old body
Back to a Cirrus White 2017 B250e

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