410.18(B) Made of Insulating Material
Luminaires (fixtures) directly wired or attached to outlets supplied by a wiring method that does not provide a ready means for grounding shall be made out of insulating material and shall have no exposed conductive parts.
Exception 2: Where no equipment grounding conductor exists at the outlet, replacement luminaires (fixtures) that are GFCI protected shall not be required to be connected to an equipment grounding conductor.
[This message has been edited by iwire (edited 11-06-2004).]