I called an electrician today to help me install smart dimmers in my home. For one of the dimmers, he tied up the neutral and ground wires from the dimmer to the copper ground wire in the wall. Is this ok (see picture)? When he first opened the box, he noticed that there was no neutral wire and then used a voltmeter to see if he can use the copper wire to connect to the neutral. After he concluded it was fine, he connected it and then just capped the green wire off (not connected to anything)...
