Hi, this is a great site for DIYers. We are buying a new clothes dryer, and while I am installing it, I want to upgrade the existing 220/240 volt 30 amp 3 plug wall receptacle to the newer 4 plug. I have a six foot piece of Romex 10/3 w/g that i will pull through a finished wall using the old 10/2 as a fish wire. The existing standard size rectangular receptacle box is metal and is flush mounted in the wall. Would it be appropriate to use the same box or should I add an extension on the front of the box because of the extra wire? It looks like space inside the box would be tight but doable without the extension but I want to do it the right way. I know how to safely do the connections, been replacing other wires for years but this box issue is new to me. Or would a wall mounted double box be better? Thanks in advance for your help.
Hey Farmer, you are NOT required to disclose this to youtr wife! Just togh it out and claim you always knew a 2-gang was best because of the added wire and the better heat dissipation. She will think you are a genius and we will never rat you out.