Preface This is the harmonized ANCE, CSA Group, and UL Standard for Safety for Personnel Protection Systems for Electric Vehicle (EV) Supply Circuits: Particular Requirements for Protection Devices for Use in Charging Systems. It is the Second edition of NMX-J-668-2-ANCE, the First edition of CAN/CSA-C22.2 No. 281.2, and the Second edition of UL 2231-2. This harmonized standard has been jointly revised on December 15, 2020. For this purpose, CSA Group and UL are issuing revision pages dated December 15, 2020, and ANCE is issuing a new edition dated December 15, 2020. 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. Scope 1.1 This Standard is intended to be read together with Annex A, Ref. No. 1. The requirements of Annex A, Ref. No. 1 apply unless modified by this Standard.