411.2 Definition.
Lighting Systems Operating at 30 Volts or Less. A lighting system consisting of an isolating power supply operating at 30 volts (42.4 volts peak) or less, under any load condition, with one or more secondary circuits, each limited to 25 amperes maximum, supplying luminaires (lighting fixtures) and associated equipment identified for the use.
411.3 Listing Required.
Lighting systems operating at 30 volts or less shall be listed for the purpose.
IMO you must use transformers listed for the purpose of suppling LV lighting.
[This message has been edited by iwire (edited 09-14-2006).]
