I'm planing out this project, but I can't seem to find anywhere that sells these inlets. I found ones for generators but they are very expensive, mostly probably because they are made for outside and come with a cover etc. Need something plain that can be installed in a standard receptacle box. Basically I want receptacles, but male versions. One to feed each circuit that will be going in.
OR can I use heavy duty extension cord cable and just a plug end? So I'd have something like:
Male end -> heavy duty extension wire (14 or 12awg) -> receptacle box -> romex -> next receptacle box etc