[Oeva-list] Question about planning for charging station

[Dan Bortel]

Hi Gene,

Dick has the right idea. Putting a 60A double breaker in your existing panel
and running 3-#6AWG (2 line and 1 neutral), and 1-#8AWG ground, in at least
a 3/4" conduit with no more than 360 degrees of total bends will meet the
requirements of the code. In the garage you can install a small sub panel
with 2 20A single breakers (1 for up to 10 outlets, and 1 for lighting), and
1 50A double breaker for a welder and/or car charging. If you need to have
more than 360 degrees of total bends in your conduit you will need to put a
'pull box' in the conduit so that no segment of the conduit has more than
360 degrees of total bends. Although the code only requires a 3/4" conduit
for this run, I would put in at least a 1" and probably a 1 1/2" to make
life a whole lot easier.

Dan


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Message: 1
Date: Sat, 30 Jan 2010 13:40:43 -0800
From: Dick Burnham <Dick-Burnham at hoffmancorp.com>
Subject: Re: [Oeva-list] Question about planning for charging station.
To: "'gfifield at onlinenw.com'" <gfifield at onlinenw.com>,
	"oeva-list at oeva.org"	<oeva-list at oeva.org>
Message-ID:
	
<170F1529B91249449A690E7E1DAA5CD9062A006725 at HCC-TOWER.Hoffmancorp.com>
Content-Type: text/plain; charset="us-ascii"

I am not an electrician and suggest you hire one.  At the very least run
this by the permit desk at the jurisdiction you live in and get a permit.
With that disclaimer - you will probably be better off running a single pipe
with 220 power to the garage and land it in a new sub panel.  Inside the sub
panel you can pull a 110 circuit with it's own breaker and land that on how
ever many outlets you want or can run on that circuit.  In the future if you
want to add a 220 outlet for your spanking new EV then it is easy to add
breakers and pull a 220 circuit out of your panel without running any new
pipe or a bunch of wire to the garage.  The other benefit is that if you in
your garage and pop the breaker it is right there to reset and you don't
have to run into the house.

Good luck!

Dick

-----Original Message-----
From: oeva-list-bounces at oeva.org [mailto:oeva-list-bounces at oeva.org] On
Behalf Of gfifield at onlinenw.com
Sent: Saturday, January 30, 2010 11:53 AM
To: oeva-list at oeva.org
Subject: [Oeva-list] Question about planning for charging station.

Hi,

I'm digging a ditch to replace a faulty underground power connection to my
detached garage. I was just going to lay in one PVC pipe for the 120V 15A
3 wires, but somebody suggested that I plan for an EV charging station.
I'm thinking of laying in two pipes, a 3/4" with the 120V 3 wire 12GA THHN
and another 3/4 inch that would be able to carry up to 3 THHN wires @ 6 GA
in the future, (I'd just put in a pull cord). I presume that I will not be
getting 3 Phase 480 to my house in the country. So right now I have 240
200Amp service to the house.

I looked up some of the codes for EV charging stations at the Beaverton
Library a few weeks ago but I didn't study enough.

I'm thinking that there is probably more to this planning, so before I bury
the pipes I'd like to know that I've got my bases covered.

Thanks,
Gene Fifield