The existing light is wired with power from the circuit panel, leg drop to switch and pig tailed to vanity light. There are three separate 12awg in this work box. The replacement fan i bought doesn't look like it will accommodate all of these conductors.
My question is this: can i run a length of 12awg from this work box substituting the light connections for the new wire and then connect this wire to the new fan box? The old box will get a cover and remain accessible. All new wire will get stapled.