1 Scope

1.1 This standard establishes program requirements for the evaluation of sustainable polymeric materials for use in electrical equipment. The test program is intended to ensure acceptable material performance with respect to flammability, electrical, mechanical, and other related safety properties.

1.2 This Standard will cover the requirements for using Mechanically Recycled Plastic in various proportions with the virgin material.

Summary of Topics

This revision of ANSI/UL 746S dated September 19, 2025, includes the following changes in requirements:

– Addition of Glossary Terms to Section 4 (4.1B – 4.1E and 4.3A); Addition of New Section 6B titled “Biobased and Chemically Recycled Materials” and Table 6B.1

– Clarification of Requirements for the Evaluation of Mechanically Recycled Plastics with Consistent Identification and Without Consistent Identification Provided in Sub-section 6.2 and Sub-section 6.3 Respectively

– Addition of Requirements for Polymer Variation Consideration in Recycle Materials in a new Section 6A (titled “Polymer Variations”) and a new Table 6A.1