Okay, here's the background to the problem. In ground swimming pool with automatic cover. Due to water problems, last spring repairman suggested removing electric motor (has forward and reverse) when I closed the pool this winter. The breaker has a GFCI. When I removed the three wires (black, green and white) I can't get the GFCI to reset. I've tried resetting the breaker at the circuit box several times. I used wire nuts to "close" the cover motor wires. Is the fact the ground on the wires coming into the motor not being "grounded" causing me to not be able to reset the GFCI? Or has my GFCI just coincidentally gone bad? As you can tell my electrical knowledge is just slightly above beginner stage. Suggestions (I know call an electrician is an option). Thanks.

The person im working with would like to drill out a hole for the entry of bx cable in a plastic box. There is a pre made punchout we could use already there in the back of the box but they would perfer to come in from the side of the box to take up less room in the closet... {were running this in the back of a closet} according to code can you drill holes in a plastic box on the sides or must you use premade cuttouts? any help apprecciated ty