montey

Im trying to hook up an outdoor spa to my main service panel, separated by a poured concrete wall/foundation. The disconnect box will be mounted to the outside surface of this wall. I drilled a 1" hole in the back of this disconnect box to receive the wire from the main power supply. I have 2 questions. Any help would be greatly appreciated. Thank you, Montey 1) Im using 6/3 Romex running from the main panel to the concrete wall. Im using a 3/4" drill to drill through the 12in concrete wall. The 6/3 romex will exit the home and go directly into the box. What do I have to do to protect the 6/3 romex going into the back of the box? Just about 1/4 in will be exposed from the wall to the disconnect box. 2) When Im running 6/3 romex in the basement inside my home, I staple the cable to the middle of the running joists, but when I have to cross over a joist, must I drill a through hole in the joist to get to the next joist or can I simply staple the cable to the bottom of the joist?