Nix01
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Re: 2018 Nissan portable EVSE manual/wiring instructions

Sat Mar 10, 2018 3:59 pm

Installing @ my work
We have 3 phase, does that change anything?

alozzy
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Re: 2018 Nissan portable EVSE manual/wiring instructions

Sat Mar 10, 2018 10:31 pm

Hopefully an electrician will weigh in, but I'm pretty sure you would use only 2 of the 3 hot phases and a ground. You can't use a 3-phase EVSE with a Leaf. Ideal output would be 208V @ 32A, to supply the maximum charging rate that the LEAF OBC can handle.
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Re: 2018 Nissan portable EVSE manual/wiring instructions

Sun Mar 11, 2018 4:32 am

Nix01 wrote:Installing @ my work
We have 3 phase, does that change anything?


Not for wiring the plug/EVSE. The two pole breaker in the panel only connects to two of the three phases. The voltage may be lower, 208 instead of 240, which means it may charge just a little bit slower.
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Re: 2018 Nissan portable EVSE manual/wiring instructions

Sun Mar 11, 2018 8:19 am

Nix01 wrote:Installing @ my work
We have 3 phase, does that change anything?

Just make sure the 3 phase is 120v/208v and not 277v/480v :shock: Basically no N. American EVSEs operate off 277v, max voltage is something like 260v.
Like at home to use the maximum charging rate(with a 6.6kwh Leaf charger) you'll need a minimum 40a breaker with minimum 8 gauge wire, 50a breaker and 6 gauge being best.
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goldbrick
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Re: 2018 Nissan portable EVSE manual/wiring instructions

Mon Mar 12, 2018 4:34 pm

I'm not an electrician either but I would guess 3-phase has the phases 120 degrees apart instead of 180 degrees like a typical house 240 circuit.

I would contact the EVSE vendor and ask them before trying to hook up the unit to 2 legs of a 3-phase circuit. It doesn't seem like a good idea to me :shock: Better yet, get an electrician to weigh in on the subject.

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Re: 2018 Nissan portable EVSE manual/wiring instructions

Sun Mar 18, 2018 4:25 pm

goldbrick wrote:I'm not an electrician either but I would guess 3-phase has the phases 120 degrees apart instead of 180 degrees like a typical house 240 circuit.

I would contact the EVSE vendor and ask them before trying to hook up the unit to 2 legs of a 3-phase circuit. It doesn't seem like a good idea to me :shock: Better yet, get an electrician to weigh in on the subject.


Check the manual for the EVSE--most will work fine on 208 volts using 2 phases of a 120/208 3-phase wye system. The LEAF onboard charger will draw more current at 208 volts (if allowed by EVSE) so the charging power is almost the same as at 240 volts. Use 2 phases, neutral, and ground to wire the NEMA 14-50 receptacle.
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goldbrick
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Re: 2018 Nissan portable EVSE manual/wiring instructions

Wed Mar 21, 2018 8:21 am

Personally, I would have 2 concerns. One is whether the 3 phase wiring is actually a wye connection or some other 3 phase system. The other is whether the loads would become unbalanced to the point where this would cause issues for any 3 phase equipment in use (eg a precision or high power motor). It's possible none of this is an issue for this installation but I would contact an electrician unless I was certain.
Last edited by goldbrick on Wed Mar 21, 2018 8:31 am, edited 1 time in total.

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EVDRIVER
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Re: 2018 Nissan portable EVSE manual/wiring instructions

Wed Mar 21, 2018 8:27 am

jjeff wrote:
Nix01 wrote:Installing @ my work
We have 3 phase, does that change anything?

Just make sure the 3 phase is 120v/208v and not 277v/480v :shock: Basically no N. American EVSEs operate off 277v, max voltage is something like 260v.
Like at home to use the maximum charging rate(with a 6.6kwh Leaf charger) you'll need a minimum 40a breaker with minimum 8 gauge wire, 50a breaker and 6 gauge being best.


Some Tesla Destination chargers are 277V.
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Re: 2018 Nissan portable EVSE manual/wiring instructions

Wed Mar 21, 2018 8:34 am

The wiring instructions are easy.

1) I hire a licensed and qualified electrician
2) Have them properly install a 14-50 oultet
3) Plug the car in

It's crazy how much banter and poor information is being discussed on something so basic. Anyone that does not know these answers off the top of their head including, wire sizes, phases, etc has no business doing anything but hiring a qualified professional This goes for any EVSE. It could not be more straight forward and it's no different than any other EVSE with a plug today.
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lorenfb
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Re: 2018 Nissan portable EVSE manual/wiring instructions

Wed Mar 21, 2018 8:47 am

goldbrick wrote:Personally, I would have 2 concerns. One is whether the 3 phase wiring is actually a wye connection or some other 3 phase system. The other is whether the loads would become unbalanced to the point where this would cause issues for any 3 phase equipment in use (eg a precision or high power motor). It's possible none of this is an issue for this installation but I would contact an electrician unless I was certain.


That's a good point. Consider using an AC voltmeter before connecting or better yet an o-scope, i.e. the peak voltage (not RMS) could
be a problem requiring use of an o-scope.
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