I have an elderly but working Wilcox Crittenden toilet with its own power supply from 2 emergency light battery packs. I'd like to hook it up to the power on bd via the electical panal to the house batteries. Anyone had a wiring diagram or suggestions? Thanks very much.
That should be very easy. Route the power line into the navsta hanging closet via hole the toilet waste tube runs through. Then up the hull and back behind the power panel. Easy to hook up the ground to the buss and tee into an existing circuit or add a new one. I would suggest running the wire from the electrical panel back to the toilet, easier to feed the wire down than up unless you have a midget that can fit into the closet. :?
What you have is a W-C Newport, discontinued more than 10 years ago. However, the manual and specs for it are still shown on the Thetford website (Thetford bought W-C about 10 years ago):
http://www.thetford.com/HOME/PARTS/PermanentToilets/Newport/tabid/577/Default.aspx
Wiring instructions are included...I suggest you follow those instead of Ken's.
ALWAYS install a new dedicated circuit, on its own breaker, for an electric toilet or treatment device. Putting it on an existing circuit means that whatever else is on that circuit is likely to be on when the toilet is flushed, pulling power away from the toilet...and low voltage damages electric motors.