UL 2577
Suspended Ceiling Power Grid Systems and Equipment

DETAILS
Edition Number:1SCC Approved:2018-08-03
Edition Date:2013-02-07DOD Approved: --
Price Code:AANSI Approved: 2018-08-03
Type:ululc

  • SCOPE

    1 Scope

    1.1 These requirements cover suspended ceiling grid low voltage/extra-low voltage systems and equipment intended for installation and use in accordance with the:

    In Canada:

    Canadian Electrical Code, Part I, Safety Standard for Electrical Installations, CSA C22.1,

    In the United States:

    National Electrical Code (NEC), ANSI/NFPA 70.

    1.2 The suspended ceiling grid low voltage/extra-low voltage systems covered by this standard are intended to be installed as a suspended ceiling grid that provides mechanical support for the ceiling tiles and provides electrical connections between the low voltage/extra-low voltage power supply and the low voltage/extra-low voltage equipment. The low voltage/extra-low voltage system consists of the following components:

    a)    An isolating type low voltage/extra-low voltage power supply with output(s) operating at 30 V (42.4 V peak) or less and not exceeding Class 2 power limits,

    b)    A grid rail power distribution system to provide power from the Class 2 power supply to one or more pieces of Class 2 powered equipment, and

    c)    Class 2 powered equipment that is electrically connected to the suspended ceiling grid low voltage/extra-low voltage system.

    1.3 The suspended ceiling grid low voltage/extra-low voltage system is intended to be permanently connected, for indoor dry locations, and installed in accordance with the following requirements:

    In Canada:

    Canadian Electrical Code, Part I, Safety Standard for Electrical Installations, CSA C22.1, and the National Building Code of Canada.

    In the United States:

    National Electrical Code (NEC), ANSI/NFPA 70, the International Building Code (IBC), and the International Mechanical Code (IMC).

    This standard also covers suspended ceiling grid low voltage/extra-low voltage systems intended for use in air-handling spaces.

    1.4 This standard does not address any supplemental or alternative requirements for suspended ceiling grid low voltage/extra-low voltage systems intended for use in:

    In Canada:

    a)    Hazardous locations as specified in the Canadian Electrical Code, Part I, Safety Standard for Electrical Installations, CSA C22.1;

    b)    General patient care areas or critical patient care areas as defined by Section 24 of the Canadian Electrical Code, Part I, Safety Standard for Electrical Installations, CSA C22.1; or

    c)    Emergency systems as defined by Section 46 of the Canadian Electrical Code, Part I, Safety Standard for Electrical Installations, CSA C22.1.

    In the United States:

    a)    Hazardous locations as specified in the National Electrical Code (NEC), ANSI/NFPA 70;

    b)    General patient care areas or critical patient care areas as defined by Article 517 of the National Electrical Code (NEC), ANSI/NFPA 70; or

    c)    Emergency systems as defined by Article 700 of the National Electrical Code (NEC), ANSI/NFPA 70.

    1.5 This standard does not evaluate the suspended ceiling grid low voltage/extra-low voltage system for seismic requirements in accordance with the:

    In Canada:

    National Building Code of Canada.

    In the United States:

    International Building Code (IBC).

    1.6 This standard does not evaluate the suspended ceiling grid low voltage/extra-low voltage systems for fire resistance.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • UL Harmonized Standard Title Page
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Components
          • 3 Units of Measurement
          • 4 Undated References
          • 5 Glossary
        • MECHANICAL CONSTRUCTION
          • 6 General
          • 7 Assembly and Mounting
          • 8 Metal Components
          • 9 Polymeric Enclosure and Insulation Materials
            • 9.1 General
            • 9.2 Flammability
            • 9.3 Relative Thermal Index (RTI)
            • 9.4 Electrical properties
          • 10 System Flammability
          • 11 Adhesives
          • 12 Strain Relief
        • ELECTRICAL CONSTRUCTION
          • 13 General
          • 14 Current-Carrying Parts
          • 15 Securement of Components
          • 16 Splices and Connections
          • 17 Electrical Spacings
          • 18 Class 2 Power Supplies and Transformers
          • 19 Luminaires
          • 20 Switches and Controls
          • 21 Control Circuits
          • 22 Class 2 Supply and Load Connectors
            • 22.1 General
            • 22.2 Power feed connector
            • 22.3 Load connectors
          • 23 Field Wiring
            • 23.1 Field wiring terminals
            • 23.2 Separation for CEC/NEC Class 2 circuits
        • PERFORMANCE
          • 24 Connector Tests
            • 24.1 General
            • 24.2 Movable connector cycle conditioning and temperature test
            • 24.3 Field-installed conductors conditioning and temperature test
            • 24.4 Fixed connector cycling test
          • 25 System Temperature Test
            • 25.1 General
            • 25.2 Test setup – grid rail system
            • 25.3 Test setup – power supplies and low voltage/extra-low voltage equipment
          • 26 Mechanical Assembly Load Test
          • 27 Moment Test
          • 28 System Flammability Test – Grid Rails
          • 29 System Flammability Test – Discrete Components Located In Air-Handling Spaces
          • 30 Mold Stress-Relief Distortion Test
          • 31 Connector Drop Test
          • 32 Field Cutting Test
          • 33 Conductor Secureness Test
          • 34 Strain Relief Test
          • 35 Push-Back Relief Test for Conductors or Cable
          • 36 Dielectric Voltage Withstand Test
        • MARKINGS
          • 37 Details
            • 37.1 General
            • 37.2 Connectors
            • 37.3 Air-handling use
            • 37.4 Correlation markings
          • 38 Installation and Operating Instructions
            • 38.1 General
            • 38.2 Operating instructions
            • 38.3 Connectors
        • TABLES
        • FIGURES
    • ANNEX A (NORMATIVE) – Reference Standards
    • ANNEX B (NORMATIVE) – Reference Publications