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Standard 1449, Edition 4

Standard for Surge Protective Devices

UL Red Line
Standard 1449, Edition 4 Edition Date: August 01, 2018
Summary of Topics s1449_4_sum.html

Summary of Topics

This revision for ANSI/UL 1449 includes the following revised requirements:

Clarification of N-G Testing and High Voltage Probes

Clarification of Requirements in Paragraph 41.2

Clarifying Power Factor for Interrupting Tests in Table 47.1

Clarifying Table 68.1 Headings

Allowance for Lower Power Factors During Intermediate Current Testing

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