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UL 555C:4ED 2014-12

Current
Current

The latest, up-to-date edition.

Ceiling Dampers
Available format(s)

Hardcopy

Published date

16-12-2014

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.

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.

DevelopmentNote
NEW CHILD REV 2 2021 IS NOW ADDED.
DocumentType
Standard
Pages
0
PublisherName
Underwriters Laboratories
Status
Current

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