Standard 1581, Edition 4
UL 1581

Reference Standard for Electrical Wires, Cables, and Flexible Cords

UL CSDS Proposal Edition 4 Published Date: September 24, 2010 Last Revision: November 29, 2023

Summary of Topics b1581_4_20100924_sum.html

Subject 1581

Bulletin Dated: September 24, 2010


The following changes in requirements to the Reference Standard for Electrical Wires, Cables, and Flexible Cords, UL 1581, are being proposed:

1. Reinstatement of the 3-Sided Enclosure for the Cable Flame Test

2. Reinstatement of Several Physical Properties Tables

3. Deletion of Construction Requirements for CPE Insulation for Type RHW from Table 50.34

4. Addition of Test Speeds and Deletion of Density Requirements for PE Materials in Tables 50.134 and 50.136

5. Revision of Description of Cotton Used in Flame Tests

6. Addition of Physical Properties Requirements for PVC/Polyurethane Blend

7. Revised Tensile Strength of XL Materials

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