BACKGROUND UL proposed the First Edition of the Standard for Photovoltaic (PV) DC Arc-Fault Circuit Protection@ UL 1699B@ in a CSDS Work Area opened October 31@ 2014. The proposed standard failed to achieve consensus and numerous comments were received. An STP meeting was held on May 19th and 20th@ 2015@ to review and resolve comments. As a result@ the following two Task Groups were formed and immediately began work on updating the Standard to address comments. A) ARC DETECTION/UNWANTED TRIPPING/MASKING TASK GROUP - formed to address the concerns raised regarding the Arc Detection Test@ Unwanted Tripping@ and the Masking Test and to develop improved test methods for the series arc tripping and unwanted tripping tests. B) SCOPE EXPANSION TASK GROUP - formed to develop revisions to expand the scope of UL 1699B to cover devices up to 1500 V. A) ARC DETECTION/UNWANTED TRIPPING/MASKING TASK GROUP