All our latest products (including the Serial NB Card) are designed to meet
and comply with IEC 950. Furthermore, compliance of CPUs will be verified via
third-party, safety-agency approvals. IEC 950 is a hybrid of the
electrical-shock, test side of IEC 380 and the flammability requirements of UL
478. Incidentally, it is also Apple's Safety Specification. Older products were
designed to meet IEC 380, but they also met the requirements of UL 478 and,
therefore, meet the latest specification (IEC 950).
NuBus cards are in the Safety Extra Low Voltage (SELV) category and, as such,
do not contribute to any electrical shock hazard. The PC board is approved to
UL 94-V-0. In addition, it does not contain any other hazardous component, like
a lithium cell. Therefore, a Macintosh system configured with a Serial NB Card
does not pose any safety hazard, and the system meets all the requirements of
IEC 950.