I have a standard (RV/boat style) male NEMA 5-15 plug mounted in the air
dam on the truck, so a standard extension cable plugs into it.
The 5-15 male plug is isolated from the J1772 plug by a relay. When 120
volts is seen by the 5-15 plug, the relay switches the chargers over
from the J1772 plug to the 5-15 plug (and limits the amp draw to 12).
So 240 volts from the J1772 can never reach the 5-15, and 120 volts from
the 5-15 can never reach the J1772 plug. It also means that if somebody
plugs in both J1772 AND an extension cord the 5-15 has priority, but
that hasn't been an issue.
Jay
On 01/09/2018 10:29 PM, Lawrence Harris via EV wrote:
Hi Jay, nice work. I have a couple of times been saved by the drive-a-way
interlock so yet I too would recommend it for anyone.
Question though, what’s on the other end of your 110v opportunity charge cable?
It looks like a male, male cable and that is pretty dangerous. I would have
put a 110v male socket on the car and made sure it was never energized by the
J1772 socket or otherwise.
Regards,
Lawrence Harris
[email protected]
On Jan 9, 2018, at 19:11, Jay Summet via EV <[email protected]> wrote:
If you have a conversion EV, please make sure that when your charger is plugged
in something disables your motor/controller so that the EV can't drive away.
This is especially important if you are using a twistlock, or J1772 connector,
but even pulling out a NEMA 5-15 by the cable isn't optimal....
There is a reason all commercial EV's have this interlock, and it's the top
photo of my blog post:
https://www.summet.com/blog/2018/01/07/new-charging-inlet-drive-away-protection/
(a hole left by pulling a J1772 inlet out of my truck....)
On the plus side, I took this "opportunity" to upgrade my charging inlet cover
so now it slides to the side instead of lifting to the top (a video of the new cover in
action is at the end of my blog post.
Jay
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