UL 2097-2006《电子设备用双绝缘系统的参考标准》

These requirements cover double insulation systems intended for use in ungrounded electronic equipment marked "Double Insulation," "Double Insulated," or with the double-insulation symbol intended to be employed in accordance with the National Electrical Code, ANSI/NFPA 70. Equipment marked "Double Insulation," "Double Insulated," or with the double-insulation symbol shall comply with the applicable requirements in this standard and in the standard covering the particular type of equipment - the end-product standard. In cases where the end-product standard contains requirements for double insulation, the end-product standard takes precedence. It is intended that the requirements in this standard be applied to end products marked as described unless the end-product standard specifies different requirements. These requirements were developed for categories that do not have double insulation requirements, to provide guidance about double insulation systems, and to promote consistent appro