splitting circuits and sharing neutral

[fuente]

As long as you're running circuits maybe you should consider running a sub panel up to the attic. That way the home runs won't be so long from the new circuits. If you're restricted to the amount of wires in a wall space then it just makes sense to run a sub-panel, that way you'll only have one cable in the wall space down to your main panel.

That makes sense as far as wiring, but doesn't that mean that every time a breaker trips or I need to de-energize a circuit, I need to go into the attic? The only attic access is thru a closet, which is full of stuff, in the baby's room. Seems like it would be a lot easier to access the panel in the garage...