Rewiring an old house to put more plug ins etc. Fishing wire down the walls
to the basement. Now I have a bunch of wires I want to put on a few
circuits. I want to run wires from breakers to a large junction box, then
tie the wires together in there that will go to each circuit. As long as I
don't go over the boxes rating for wires, can more than one circuit be
served by one box? Or should I have a separate box for each circuit?

I did a net search for this and only found one post where a fellow said it
was ok if you put a warning on the box cover that it is served by more than
one breaker.

I want this to be to code.

TIA
Gary