Actually 220.14 (I) states 180 VA . This means 120V times 15A divided by 180 VA equals 10. That is 10 receptacles on a normal 15 A circuit. Where as 120V times 20A divided by 180VA equals 13. This is in 2011 NEC.
Mike, you did notice that this is the NON-US section right?
Also, you can't load the 15 and 20 amp circuits beyond 80% unless the OCP is fully rated so you are limited to 12 amps on the 15 amp circuit or 8 receptacles and 16 amps on the 20 amp circuit or 10 receptacles.
If the circuits are for residential general illumination then there is no limitation on the number of receptacles though common sense should come into the equation, but all of this only applies where the NEC is enforced though which is not within this section of the forum.
