If you bundle 10 to 20 current carrying conductors, the derating factor is 50%. If you have no more than 6 outlets at 180 VA each on the circuit, you would still be OK for derating with out increasing the size of the conductors (assuming #12 wire and 20A circuit).

Reference:

310.15(B)(2)(a)

Note: EGC's and Multiwire "true" neutrals are exempt from the conductor count.

<disclaimer>
This is how I interpret it.
</disclaimer>

[This message has been edited by sparky66wv (edited 09-16-2002).]

-Virgil
Residential/Commercial Inspector
5 Star Inspections
Member IAEI