mikelb
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Safe to charge via dryer outlet?

Sat Aug 30, 2014 9:40 pm

I have a dryer outlet that is 30A, 250V. Is it safe to charge by unplugging the dryer and plugging in the EV when I need to charge, and plugging in the dryer when it's needed? Are there any safety concerns?

Thanks!
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smkettner
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Re: Safe to charge via dryer outlet?

Sat Aug 30, 2014 9:45 pm

Good to go up to 24 amp EVSE.
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LeftieBiker
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Re: Safe to charge via dryer outlet?

Sat Aug 30, 2014 10:16 pm

A lot of plug/unplug cycles are bad for both the outlet and the plugs. This isn't a great solution long-term so you need to either run a new circuit, or come up with an either/or switch that can toggle two dryer outlets so that only one can be on at a time. For now it's ok as long as the plugs fit tightly.
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Graffi
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Re: Safe to charge via dryer outlet?

Tue Sep 02, 2014 9:43 am

mikelb wrote:I have a dryer outlet that is 30A, 250V. Is it safe to charge by unplugging the dryer and plugging in the EV when I need to charge, and plugging in the dryer when it's needed? Are there any safety concerns?

Thanks!
DO NOT, UNDER ANY CIRCUMSTANCES, plug an unmodified 120v evse, such as the one that came with your Leaf, into a 240v outlet.

As was already stated, you can get an EVSE rated 24 amps or less, or update the circuit to 40 amps and use a 30 amp EVSE. This would be my choice, as long as the wires will handle 40 amps. Just replace the circuit breaker, then install an additional outlet next to the current one, using the type of outlet that the EVSE uses. Leave both the dryer and the EVSE plugged in all the time, but NEVER use the dryer when the EV is charging.
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Nubo
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Re: Safe to charge via dryer outlet?

Tue Sep 02, 2014 1:55 pm

Graffi wrote:As was already stated, you can get an EVSE rated 24 amps or less, or update the circuit to 40 amps and use a 30 amp EVSE. This would be my choice, as long as the wires will handle 40 amps. Just replace the circuit breaker, then install an additional outlet next to the current one, using the type of outlet that the EVSE uses. Leave both the dryer and the EVSE plugged in all the time, but NEVER use the dryer when the EV is charging.
That's absolutely against code. Only one 240V device allowed per circuit. "Remembering" to never run them together is subject to error either by forgetfulness or perhaps visitors "helping out". And "the circuit breaker will save me" is not the right way to look at it.

As far as plugging into the dryer socket; it will work but the average dryer socket is not designed for a high number of plug/unplug cycles. A worn or loose plug-socket connection is bad news when you're pulling a constant 20 amps. This is a high-power, long-duration application. Everything about the circuit and connections should be top-notch.
I noticed you're still working with polymers.

Phatcat73
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Re: Safe to charge via dryer outlet?

Tue Sep 02, 2014 2:54 pm

Similar question. I have a Bosch 240V 16 amp EVSE and an unused 3 prong 240V 30 amp dryer outlet (considered the old style outlet). The EVSE requires a hard wired connection. I purchased a dryer cord, installed it to the EVSE and found that it works!

However, the Bosch requires 2 hot leads and a ground, whereas the 3 prong outlet has 2 hot leads and a neutral.

Is this safe? If not, how is evseupgrade getting around this with their adapter?

Thx.
Mark
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smkettner
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Re: Safe to charge via dryer outlet?

Tue Sep 02, 2014 3:17 pm

Yes, the old plug used a shared Neutral/Ground.
The only difference is the color of the insulation. Connects same electrically in the main panel.
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2 bar lost at 35,339 miles, 25 months.
LEAF traded at 45,400 miles for a RAV4-EV
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billg
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Re: Safe to charge via dryer outlet?

Tue Sep 02, 2014 3:34 pm

Phatcat73 wrote:Similar question. I have a Bosch 240V 16 amp EVSE and an unused 3 prong 240V 30 amp dryer outlet (considered the old style outlet). The EVSE requires a hard wired connection. I purchased a dryer cord, installed it to the EVSE and found that it works!

However, the Bosch requires 2 hot leads and a ground, whereas the 3 prong outlet has 2 hot leads and a neutral.

Is this safe? If not, how is evseupgrade getting around this with their adapter?

Thx.
Mark
Read through the information provided re: neutral vs. ground is this previous thread:
http://www.mynissanleaf.com/viewtopic.p ... 80#p383180

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TonyWilliams
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Re: Safe to charge via dryer outlet?

Tue Sep 02, 2014 4:48 pm

Graffi wrote:Leave both the dryer and the EVSE plugged in all the time, but NEVER use the dryer when the EV is charging.
That is neither code, nor safe.

You are literally betting a possible fire that the circuit breaker will save the day.

LeftieBiker
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Re: Safe to charge via dryer outlet?

Tue Sep 02, 2014 5:21 pm

Yes, that's why I suggested an either/or switch. Too risky to count on the breaker.
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