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Standard 1449, Edition 4

Standard for Surge Protective Devices

UL CSDS Proposal
Standard 1449, Edition 4 Edition Date: November 03, 2017
Summary of Topics b1449_4_20171103_sum.html

Subject 1449

Bulletin Dated: November 3, 2017


The following changes in requirements to the Standard for Surge Protective Devices, UL 1449, are being proposed:

1. Spacings on Multi-layer PWBs

2. Clarification of N-G Testing and High Voltage Probes

3. Revision of 40.7.1 Pertaining to In Measurement

4. Addition of New Paragraph 1.19 to Include Ambient Temperature Range for SPDs

5. Clarification of Requirements in Paragraph 41.2

6. Addition to Require Testing when a Thermal Responsive Device Opens During the Short Circuit or Intermediate Current Tests

7. UL 1449 Clarifications and Corrections

8. Clarifying Power Factor for Interrupting Tests in Table 47.1

9. Clarifying Table 68.1 Headings

10. Expand the Values of In, Nominal Discharge Currents, in 40.7.1

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