I do not believe there is a need for a specific exception for ranges.
A 50 amp single receptacle can be supplied with a 30 amp branch circuit.
A 100 amp single receptacle can be supplied with a 30 amp branch circuit.
This is the rule for single receptacles.
220.21(B)(10 Receptacles.
(1) Single Receptacle on an Individual Branch Circuit. A single receptacle installed on an individual branch circuit shall have an ampere rating not less than that of the branch circuit.
Bob
[This message has been edited by iwire (edited 11-15-2005).]
