voltiar
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Help with wiring a NEMA 10-30P outlet!

Sun Dec 04, 2016 2:20 pm

Hi all, I replacing my dead Voltec charger with a portable charger (sorry, EVSE, I got chided last post for calling it a charger :roll: ) with a NEMA 10-30P plug at the end. I took off the Voltec and saw I had a red, black and green wire. I was expecting a red, black and white (hot, hot, neutral). Don't know if that's correct or if my licenced electrician just used the wrong color wire, but I checked the voltage with a multimeter and it comes up 120/120 out of each prong with the black probe on the green wire. Is this safe or do I need to have an electrician rewire with a hot. If that's the case I may opt for replacing the Voltec with another similar "hard wired" unit rather than hire a pro to install a neutral. Thanks!

LeftieBiker
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Re: Help with wiring a NEMA 10-30P outlet!

Sun Dec 04, 2016 2:28 pm

EVSEs don't use a Neutral wire, just two Hots and a Ground. If you are wiring a new outlet it's a good idea to include a Neutral wire in the outlet for use with dryers, but if the EVSE is the only thing that will be using the outlet then Neutral is optional. If omitting the Neutral the outlet should be labelled to indicate that. If you are just attaching a new plug, then you are good to go. Just make sure all connections are perfect.
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voltiar
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Re: Help with wiring a NEMA 10-30P outlet!

Sun Dec 04, 2016 2:37 pm

Thanks. It sounds like I am good then. This is an outside outlet that's to be used JUST for the car charger. What would happen in someone plugged a dryer in there (a three wire plug, not the newer 4 wire ones)? Would it be unsafe? Not that that's likely to happen, just curious.

smkettner
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Re: Help with wiring a NEMA 10-30P outlet!

Sun Dec 04, 2016 6:20 pm

voltiar wrote:Thanks. It sounds like I am good then. This is an outside outlet that's to be used JUST for the car charger. What would happen in someone plugged a dryer in there (a three wire plug, not the newer 4 wire ones)? Would it be unsafe? Not that that's likely to happen, just curious.
The outlet is wired to code and will operate fine for any device that has a 10-30 plug.

BTW I see nothing wrong with calling your Electric Vehicle Supply Equipment (EVSE) a charger. Everyone knows what you are talking about even if it in not technically correct. I mean what do you call the cord to charge your phone? Probably not technically correct either.
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cwerdna
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Re: Help with wiring a NEMA 10-30P outlet!

Sun Dec 04, 2016 6:22 pm

smkettner wrote: BTW I see nothing wrong with calling your Electric Vehicle Supply Equipment (EVSE) a charger.
It can create confusion and result in money wasting mistakes. See http://www.mynissanleaf.com/viewtopic.p ... 68#p332668.

There have been cases here and other boards where people with 3.x or 6.x kW OBC have wanted to buy 40 amp L2 EVSEs thinking it would speed up their charging above their 30 or 32 amp EVSEs. And, people could buy the wrong vehicle (e.g. one w/3.x kW OBC only) or equipment level because a salesman misled them into thinking it won't make a difference and that buying a higher wattage "charger" (ahem... EVSE) would speed things up. There are a plethora of other examples.

My house apparently doesn't have the electrical capacity for a 30 amp EVSE (40 amp circuit). Electrician wanted $5K to trench and run another cable. Imagine someone doing this for a 3.x kW OBC equipped car and when a 15 or 16 amp L2 EVSE would've been enough.

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smkettner
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Re: Help with wiring a NEMA 10-30P outlet!

Sun Dec 04, 2016 6:31 pm

cwerdna wrote:
smkettner wrote: BTW I see nothing wrong with calling your Electric Vehicle Supply Equipment (EVSE) a charger.
It can create confusion and result in money wasting mistakes. See http://www.mynissanleaf.com/viewtopic.p ... 68#p332668.
No I don't buy it. I think everyone does know what the person is talking about when they say "charger" in the context of the main subject that can vary between L1, L2, L3 and DC charging or even the on-board charger and probably other stuff. If you did not know how is everyone so quick to correct them?

I use the word "charger" a lot in general conversation. But not really on this board for obvious reasons.
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LeftieBiker
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Re: Help with wiring a NEMA 10-30P outlet!

Sun Dec 04, 2016 9:05 pm

"My charger died today. Can someone help me find another one?"
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cwerdna
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Re: Help with wiring a NEMA 10-30P outlet!

Sun Dec 04, 2016 9:27 pm

smkettner wrote:
cwerdna wrote:
smkettner wrote: BTW I see nothing wrong with calling your Electric Vehicle Supply Equipment (EVSE) a charger.
It can create confusion and result in money wasting mistakes. See http://www.mynissanleaf.com/viewtopic.p ... 68#p332668.
No I don't buy it. I think everyone does know what the person is talking about when they say "charger" in the context of the main subject that can vary between L1, L2, L3 and DC charging or even the on-board charger and probably other stuff. If you did not know how is everyone so quick to correct them?
You don't buy it?

How about these? If people keeping being sloppy with their terminology, they and others get confused. And, if the person doesn't actually ask around or understand, they will waste money. I quickly found a few of these via Google searches.

http://www.mychevysparkev.com/forum/vie ... f=7&t=3792 - Spark EV only has 3.3 kW OBC and he wants to speed up charging by buying a 30 amp "charger" instead of a 15 amp.

http://www.mynissanleaf.com/viewtopic.p ... 36#p434670 - he wants to buy a 48 amp "charger" (UGH!) to speed up charging
http://www.mynissanleaf.com/viewtopic.p ... 27#p417421 - at least he got the answer quickly
http://www.mynissanleaf.com/viewtopic.p ... 82#p322585 followed up by http://www.mynissanleaf.com/viewtopic.p ... 96#p322596

I'm sure I can find more, if I spend more time digging.

It is important to understand what each of the separate pieces are and there can be bottlenecks. To overload the name "charger" to represent both the on-board charger and the EVSE really adds to the confusion. The person may not get that they're separate distinct components.
Last edited by cwerdna on Sun Dec 04, 2016 9:29 pm, edited 2 times in total.

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wwhitney
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Re: Help with wiring a NEMA 10-30P outlet!

Sun Dec 04, 2016 9:28 pm

For a grounded, 240V connection, NEMA 6 is the correct series. The NEMA 10 series is for 240/120V ungrounded connections. So if this is a new installation of EVSE and receptacle, get an EVSE with a 6-30 plug and install a 6-30 receptacle

EVSEs may be sold with a 10-30 plug on them for use with old ungrounded dryer circuits. So if you have one of those already, it would be more proper to install a 6-30 receptacle and use a 6-30P to 10-30R pigtail. Note the P means plug and the R mean receptacle.

Cheers, Wayne

smkettner
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Re: Help with wiring a NEMA 10-30P outlet!

Sun Dec 04, 2016 11:04 pm

LeftieBiker wrote:"My charger died today. Can someone help me find another one?"
Sure, what model do you have now?
1 bar lost at 21,451 miles, 16 months.
2 bar lost at 35,339 miles, 25 months.
LEAF traded at 45,400 miles for a RAV4-EV
RAV4 traded in for I-Pace Dec 2018

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