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Standard 1449, Edition 4

Standard for Surge Protective Devices

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Standard 1449, Edition 4 Edition Date: February 20, 2015
Summary of Topics b1449_4_20150220_sum.html

Subject 1449

Bulletin Dated: February 20, 2015


The following topics for the Standard for Surge Protective Devices, UL 1449, are being recirculated:

1. Correction to Requirements in

5. Definition and Clarification of the Use of Cheesecloth and Tissue Paper

7. Clarifications to Sections 40 and 44

8. Clarification of Table 36.1 and Table 36.2

9. Clarification of Requirements for SPDs Intended for Rack Mounting

10. Addition of Requirements for Outdoor use Type 3 SPDs

11. Revision of 44.1.11(f) and 44.2.5(c)

12. Revision of 44.4.1 Regarding SPD Temperature Equilibrium

13. Addition of Exception to 44.1.7 to Address Cheesecloth Placement for Enclosures with Conduit Openings

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