A friend is adding a new bathroom in a new house annex. He converted a wood porch to a new bathroom. Does this new bathroom need it outlets to be on it's own circuit or can it be shared with the outlet circuit of the adjacent dining room? I already know about the need for gfci's. It's the sharing of his dining room circuit with the new bath that I am concerned about. As a lessor question, can he install the new bathroom ceiling exhaust fan on the bathroom lighting circuit?

I must admit that my questions arise from situations that I encounter. If an empty panel box without breakers was properly bonded via conduit to the main panel box; could a ground buss be inserted in the new empty one and used for the grounds and neutrals that seem to have run out of space. I understand some grounds can be doubled up if of the same AWG. This still leaves me with not enough space for some neutrals. I use all of my 24 breakers and my bar is used for both grounds & neutrals. It has only 24 screws. The diagram on this older General Switch panel shows room for another bar, but it must be for another model. This one is quite crowded for now. So does my idea of attaching another empty box with just a grounding buss in it fly or (no pun intended here) just stay grounded for now and forever. :confused: