To expand the electrical box in the wall, cut out a hole and make the opening bigger. Add more electrical boxes (ganged) and you'll end up with 4 sockets, enough to handle all eight plugs. I suggest you buy four Hospital grade plugs and four electrical boxes. A tip for you: gang the plugs in the box, then install it, leaving the only connection to be done while the box is in the wall to the live electrical wire. Obviously, do this with the power off. This is something you can do inexpensively and easily but the best option remains dedicated lines. Jeff
