tomw via EV wrote:
I did something similar to this, only using 240VAC rather than 120VAC. I have both NEMA 14-50 and J1772 power inputs to the charger. I used this DPST relay with 240VAC coil to switch between them: http://www.onlinecomponents.com/magnecraft-schneider-electric-w199apx15.html?p=29816731
This relay is a good choice for this application. One important feature is that its normally-closed contacts have the same voltage-current rating as the normally-open contacts. This is not true for many relays (read the fine print!)
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