Summary of Topics:

This revision of UL 746E includes the following changes in requirements:

Clarification of Definition of Metal Base Laminate

Clarification of Requirements for Measurement Accuracy and Testing Conditions

Addition of Reference to ASTM D 618 to Paragraph 6.2

Clarification of Requirements in Table 7.1

Delete References to 1-Point LTTA Evaluations

Addition of Requirements for Thickness and Directional Properties

Addition of Requirements for Polymer Variations

Addition of Requirements for Analytical Testing at Material Minimum Thickness

Addition of Sample Dimension Tolerances and Paragraph References to Tables 8.1, 9.1, 9.3, 10.3, 10.4, 11.1, 11.3, 20.1, and 22.1

Clarification of Notes in Table 9.1

Clarification of Requirements for Material Mechanical Property Determination at Thicker Thicknesses

Clarification of Requirements in Table 10.1

Clarification of Requirements for Sheet Thickness Testing in Paragraph 10.1.6

Correction of Thickness Conversions in Table 10.2

Clarification of Requirements in Paragraphs 10.2.2.1 and 10.2.2.4 and Tables 10.3 and 10.4

Clarification of Requirements in Paragraph 11.7.4

Clarification of Requirements for Vulcanized Fibre and Filament Wound Tubing IR

Clarification of Requirements for Metal Clad Test Program

Clarification of Requirements for Data Collection in Section 17.3A

Clarification of Requirements for Microsection Analysis in Section 17.3B

Clarification of Requirements for Conductive Paste Thermal Cycling Manual and Automated Processes

Update of Requirements for CTI Sample Thickness in Paragraph 17.9

Clarification of Requirements for Mass Laminate Materials

Clarification of Requirements for Metal Base Laminates