Subject 1660

Bulletin Dated: June 30, 2017

SUMMARY OF TOPICS

The following changes in requirements to the Standard for Liquid-Tight Flexible Nonmetallic Conduit, UL 1660, are being proposed for preliminary review and comment only:

1. For Preliminary Review Only: Include the Reference to the Mexican Electrical Installation Code, Reference Publications and ANCE References

2. For Preliminary Review Only: Aligning the Definitions of Liquid-Tight in Accordance to NEC 356.10(2)

3. For Preliminary Review Only: Deletion of the Component Section

4. For Preliminary Review Only: Deletion of the Publication Year

5. For Preliminary Review Only: Specify the Impact Height.

6. For Preliminary Review Only: Restructure Moisture Penetration for Ease of Readability

7. For Preliminary Review Only: Addition of Inside and Outside Dimensions, Wall Thickness of Flexible Lining or Jacket, Development of Minimum Deflection Load and Mandrel Diameters for 2-1/2, 3, 3-1/2 and 4 Trade Size Mandrels for Liquid-Tight Flexible Nonmetallic Conduit

8. For Preliminary Review Only: Adding the Figure 1 Key