Electrical Questions? Ask an Electrician Online.
hi this is John and will be glad to help.......is the sub panel weather proof and mounted to an exterior wall??? if you are running the wire inside of a building then entering the back of the sub panel using the proper size connector, there should be no problem as long as the romex is not exposed. I would also recommend some type of sealant around the hole to prevent any leakage into the building.
this is really no different than when they wire for an a/c disconnect, as long as the romex is not exposed to the elements......if it is going through a masonary wall then the wire should be shielded using pvc or a liquid tight application. if you were to bring the wire through a hole and mount the panel above the wire and then bend wire into panel that would be exposing the romex
also I am assuming that even though you are using a 125 sub panel with main lugs, you are fusing it at the main panel with a 2 pole 60 amp breaker
make sure in the sub panel that you separate the grounds and neutrals and on the ground side it is bonded to the panel....eliminate any jumper between the two neutral bars. it sounds like you are on the right track and good luck with your install!!! don't forget to take the time and accept my answers and rate your experience with the site......
checking back to see if you were able to complete your project andalso to remind you to accept my answer and to rate your experience with the website