Extension for 3x2 device box + outlet question
My son replaced the outlet in garage ceiling for GDO.
The wires were short and he had to pigtail the outlet. That didnt leave much room for both the outlet and meeting boxfill in general.
He went to the hardware store looking for a 3x2 device box extension. Couldnt find one, so instead used a Handybox extension and it fit perfectly to the screws on the device box.
Is that the proper extension to use for this situation?
Also the OLD outlet was had 3 wires going to it.... hot/neutral on one set of screws and a lone neutral on another screw. There were some wirenuts in the box left undistrubed. We figure the extra neutral was passing thru the outlet so instead he pigtailed the two neutrals and connected it to the outlet. Is that OK?