Standard Test Method for Comparative Tracking Index of Electrical Insulating Materials1

This standard is issued under the ﬁxed designation D 3638; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.