Art. 314

[Hendrix]

Is there anything that specificly states that, if there is a three wire in a lighting outlet in the ceiling, the box must be fan rated ?

 

[jumper]

Sorta. For resi apps there is this, bolded is new to the 2011:

314.27
(C) Boxes at Ceiling-Suspended (Paddle) Fan Outlets.
Outlet boxes or outlet box systems used as the sole support
of a ceiling-suspended (paddle) fan shall be listed, shall be
marked by their manufacturer as suitable for this purpose,
and shall not support ceiling-suspended (paddle) fans that
weigh more than 32 kg (70 lb). For outlet boxes or outlet box
systems designed to support ceiling-suspended (paddle) fans
that weigh more than 16 kg (35 lb), the required marking shall
include the maximum weight to be supported.
Where spare, separately switched, ungrounded conductors
are provided to a ceiling mounted outlet box, in a
location acceptable for a ceiling-suspended (paddle) fan in
single or multi-family dwellings, the outlet box or outlet
box system shall be listed for sole support of a ceilingsuspended
(paddle) fan.

 

[Hendrix]

Thanks, that's what I found too.