Recently got a new video doorbell and noticed that it was flaky, especially at night when the IR was active. Tech support suggested my 16v 10va transformer could be the reason and suggested a 24v/40va model, which I got.
When I opened the panel, I noticed my old transformer has a 3rd green ground wire, but the new one does not have one (see photos). I don't know what to do with that ground wire, so I'm thinking to send this transformer back and get one with a ground wire - I'm obviously not an electrician but I can connect 3 primary wires - but thought I'd check with those more qualified on here first.