I had asked about a ceiling fan installation in my house, and I have a
follow-up question. I have to run wiring across the ceiling beam from
an existing fan. That will put them on the same switch. The easiest
way seems to be running some thing wire from the existing fan
connection, up through it's hole in the beam, across the beam, and down
the fresh hole.
I can't use too thick of a wire for that connection, and I think very
thin wires as run into the fan itself would work. However, I don't know
if there's a major safety issue there. While it's just a fan, it will
still run often.
I recall there's an issue of codes when extending connections. The
alternative would be a heavy gauge wire up where the wire first comes
out of the ceiling drywall. There isn't any slack there, and I see it
being a real PITA to extend in that space. Furthermore, I believe codes
state I'd have to make an easy access to that connection if I make it.
This wouldn't be a big deal if I ran from the existing fan connection.