This is the harmonized ANCE, CSA Group, and UL standard for Low-Voltage Fuses - Part 12: Class R Fuses. It is the third edition of NMX-J-009/248/12-ANCE, the third edition of CSA C22.2 No. 248.12-11, and the third edition of UL 248-11. This edition of NMX-J-009-248/12-ANCE supersedes the previous edition published in 2006. This edition of CSA C22.2 No. 248.12-11 supersedes the previous edition published in 2000.
This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.
This standard has been approved by the American National Standards Institute (ANSI) as an American National Standard.
This Part applies to Class R fuses rated 600 A or less and either 250 or 600 V ac. DC ratings are optional.