I have one like the originally posted link, connected in the garage to the 240 volt circuit feeding my charging connection for our Nissan Leaf electric car, so that I know what the car is using. It works fine and does what I expected and the price was great. It is mounted on a 4x4 electrical box with extension so there is room for the #6 wire and the connections and the current transformer--the meter is mounted on a knock-out on top of the box. I'm thinking of getting a couple more to monitor energy usage of my mini-split heat pumps, if I can figure a good place to mount them.
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