1 Scope

This part of IEC 60950 applies to information technology equipment intended to supply and receive operating power via a TELECOMMUNICATION NETWORK, where the voltage exceeds the limits for TNV CIRCUITS.

Summary of Topics

This revision of ANSI/UL 60950-21 is being issued to reaffirm approval as an American National Standard. No changes in requirements are involved

As noted in the Commitment for Amendments statement located on the back side of the title page, UL and CSA are committed to updating this harmonized standard jointly. However, the revision pages dated July 8, 2016 will not be jointly issued by UL and CSA as these revision pages only address UL ANSI approval dates.

UL 60950-21 is an adoption of IEC 60950-21, Information Technology Equipment - Safety - Part 21: Remote Power Feeding (First Edition, issued December 2002).