UL 555C:4ED 2014-12-16
Current
The latest, up-to-date edition.
Ceiling Dampers
Hardcopy
12-16-2014
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Foreword
Introduction
1 Scope
2 General
Construction
3 Components
4 Corrosion protection
Performance
5 General
6 Fire-endurance test
7 Closing reliability test
8 Dust loading test
9 Salt-spray exposure test
10 Spring closing force test
11 Metallic coating thickness test
Manufacturer's instructions
12 Installation instructions
Marking
13 General
This revision of ANSI/UL 555C dated January 21, 2021 is being issued to include an additional option for Protection Against Corrosion and changes to dynamic single or bidirectional airflow; 4.1, 10.1.3 and 13.1.
| DevelopmentNote |
NEW CHILD REV 2 2021 IS NOW ADDED.
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| DocumentType |
Standard
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| Pages |
0
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| PublisherName |
Underwriters Laboratories
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| Status |
Current
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These requirements and methods of tests apply to ceiling dampers and ceiling air diffusers intended for installation in hourly rated fire resistive floor-ceiling and roof-ceiling assemblies.
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