1、NEMA Standards PublicationNational Electrical Manufacturers AssociationANSI C137.3-2017Lighting Systems Minimum Requirements for Installation of Energy Efficient Power over Ethernet (PoE) Lighting SystemsANSI C137.3-2017 Page i 2017 National Electrical Manufacturers Association ANSI C137.3-2017 Amer
2、ican National Standard for Lighting Systems Minimum Requirements for Installation of Energy Efficient Power over Ethernet (PoE) Lighting Systems Secretariat: National Electrical Manufacturers Association Approved: May 25, 2017 American National Standards Institute, Inc. ANSI C137.3-2017 Page ii 2017
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21、ut the prior written permission of the publisher. Printed in the United States of America ANSI C137.3-2017 Page ii 2017 National Electrical Manufacturers Association ANSI C137.3-2017 Page iii 2017 National Electrical Manufacturers Association CONTENTS 1 Scope . 1 2 References . 2 2.1 Normative Refer
22、ences 2 2.2 Informative References 2 3 Definitions . 3 4 Installation Requirements . 3 Annex A . 5 ANSI C137.3-2017 Page iv 2017 National Electrical Manufacturers Association Foreword Utilizing Power over Ethernet (PoE) technology to provide power and communication to a lighting system can provide b
23、enefits including high energy efficiency, simplified installation, and high bandwidth data transmission. However, resistive line losses within PoE lighting distribution systems utilizing CAT5/6 cabling can exceed 15% depending on the gauge of PoE cable selected, resulting in an overall system effica
24、cy that can be significantly lower than traditional AC-powered 120480 V lighting systems. Utilizing a cable with an appropriate wire gauge can limit these losses and help ensure a PoE lighting system that can match or exceed the efficacy of a traditional 120480 V AC lighting system. This standard es
25、tablishes the minimum gauge of wire to limit resistive line losses and support an energy efficient PoE lighting system. This standard was developed by a committee including lighting manufacturers, PoE equipment manufacturers, electric utilities, and energy efficiency performance rating organizations
26、. The commercially available gauge sizes specified by the standard have been chosen to result in average resistive line losses of less than 5% of total power delivered across typical installations assuming an average cable length of 50 m. At the time this standard was approved the ANSI C137 committe
27、e was composed of the following members: Acuity Brands ALA Atlas Cree CSA Digital Lumens DimOnOff Inc. Duke Energy Duke Energy Progress Eaton Lighting Solutions Energy Focus EYE Lighting Florida Power & Light GE Lighting Georgia Power Gulf Power Hubbell Lighting IALD IES Intertek Lambda 530 Consulti
28、ng LED Roadway Lighting Legrand Leidos Leviton Lighting Science Group Lumispec Consulting Lutron MAXLITE NEEP/DLC OSRAM SYLVANIA Philips Lighting PNNL ANSI C137.3-2017 Page v 2017 National Electrical Manufacturers Association RAB Lighting Schneider Electric Silver Spring Networks SMUD Sunrise Techno
29、logies TE Connectivity Telematics Wireless Telensa UL Universal Lighting TechnologiesANSI C137.3-2017 Page vi 2017 National Electrical Manufacturers Association ANSI C137.3-2017 Page 1 2017 National Electrical Manufacturers Association 1 Scope 1.1 This standard specifies the minimum requirements for
30、 installation of Power over Ethernet (PoE) lighting systems to ensure minimal energy losses. A typical PoE lighting system uses standardized Ethernet twisted pair cable (e.g. category 5e cable) to connect powered devices (PDs), such as luminaires, to DC power source equipment (PSE) (e.g., network sw
31、itch) without the need for AC line voltage power to the luminaires. The Ethernet cable also carries data for control and monitoring of the luminaire. 1.2 The energy efficiency of a PoE lighting system depends on three elements: PSE efficiency, PD efficiency, and cable energy losses. This standard sp
32、ecifies cable and installation practices to limit the electrical energy losses of the cable between the PSE and the PD. 1.3 Applications include, but are not limited to, commercial, residential, and industrial lighting applications. ANSI C137.3-2017 Page 2 2017 National Electrical Manufacturers Asso
33、ciation 2 References 2.1 Normative References The following normative documents are adopted, in whole or in part as indicated, in this standards publication. IEEE 802.3-2015, Clause 33. Data Terminal Equipment (DTE) Power via Media Dependent Interface (MDI) ANSI/TIA/EIA 568-C.2 Commercial Building T
34、elecommunications Cabling Standard ASTM B258-14 Standard Specification for Standard Nominal Diameters and Cross-Sectional Areas of AWG Sizes of Solid Round Wires Used as Electrical Conductors NFPA 70-2017 National Electrical Code 2.2 Informative References This standard is intended to be used in con
35、junction with the following publications. The latest edition of the publication applies (including amendments). ANSI/NEMA WC 66/ICEA S-116-732-2013 Standard for Category 6 and 6A, 100 Ohm, Individually Unshielded Twisted Pairs, Indoor Cables (With or Without an Overall Shield) for Use in LAN Communi
36、cation Wiring Systems ASTM B263/B263M-14 Standard Test Method for Determination of Cross-Sectional Area of Stranded Conductors ICEA S-90-661 2012 Category 3, 5, & 5e Individually Unshielded Twisted Pairs, Indoor Cables (With or without an Overall Shield) for Use in General Purpose and LAN Communicat
37、ions Wiring Systems Technical Requirements IES LM-79-08 Electrical and Photometric Measurements of Solid-State Lighting Products ISO/TR29125-2010 Information TechnologyTelecommunications Cabling Requirements for Remote Powering of Terminal Equipment TIA TSB-184-A Guidelines for Supporting Power Deli
38、very over Balanced Twisted-Pair Cabling ANSI C137.3-2017 Page 3 2017 National Electrical Manufacturers Association 3 Definitions 3.1 Category cable Unshielded twisted pair (UTP) telecommunications cable defined in ANSI/TIA/EIA 568-C.2. Note: Example is category 5e or 6A cable. 3.2 Power over Etherne
39、t (PoE) Use of category cable to carry both Ethernet communications data and DC power to the powered device. 3.3 Power Sourcing Equipment (PSE) The end station (Ethernet switch) or mid-span equipment (a power injector installed between the Ethernet switch and the powered device (PD) that provides th
40、e power to a single PD. (IEEE 802.3-2015) 3.4 Powered Device (PD) Device receiving both DC power and Ethernet data over a category cable. Note 1: Examples are PoE LED drivers. Note 2: A PD may also provide power to external devices. 4 Installation Requirements 4.1 Cable Requirements 4.1.1 Prescripti
41、ve Wire Selection Method Each conductor of the category cable, including any patch cables, installed between any PSE and any PD shall be copper and shall be of the same or greater cross-sectional area as the wire gauge listed in Table 1. The total length of category cable shall not exceed 100 meters
42、 from connection at the PSE to the connection at the PD. Table 1 Minimum Wire Gauge Maximum Total Rated DC Power of PD Minimum Wire Gauge of Cable 25.5W and 55W and = 71W 23 AWG * *Exception: Patch cables with copper conductors of 26 AWG or equivalent cross sectional area shall be allowed when the t
43、otal aggregate length of such patch cables is no more than 5 meters. Notes: 1. The maximum total rated power of the PD includes the total power of the PD and all devices receiving power from the PD. 2. PDs rated above 25.5W require 4 pairs of conductors be used to supply power. ANSI C137.3-2017 Page
44、 4 2017 National Electrical Manufacturers Association 4.1.2 System Calculation Method As an alternative to the requirements in clause 4.1.1, a calculation of the total DC electrical power loss of the cables performed by qualified individuals using the actual cable lengths and electrical characterist
45、ics in the system to be installed, shall result in an estimate of less than 5% cable power loss relative to the total power delivered by the PSEs across the system. 4.2 Cable Connectors The connectors and connection points shall be rated for the type and gauge of cable and the DC voltage and current
46、 required by the PD. 4.3 Cable Installation The category cable between the PSE and PD shall be installed per NFPA 70 or other regional electrical safety code accepted by the Authority Having Jurisdiction. ANSI C137.3-2017 Page 5 2017 National Electrical Manufacturers Association Annex A (Informative
47、) DC Resistance of Common Communication Gauges A.1 DC Resistance of Common Communication Gauges Table A1 DC Resistance (DCR) for Solid Copper Wire Gauges Per ASTM B2581AWG Area mm2Ohms/m Ohms/ft. 28 0.0804 0.2129 0.0649 27 0.102 0.1689 0.05147 26 0.128 0.1339 0.04081 25 0.162 0.1062 0.03237 24 0.205
48、 0.0842 0.02567 23 0.259 0.0668 0.02036 22 0.324 0.0530 0.01614 21 0.412 0.0420 0.0128 20 0.519 0.0333 0.01015 19 0.653 0.0264 0.00805 18 0.823 0.0210 0.00639 Note: Resistance at 20C temperature. 1Table data extracted from ASTM B258-14, Standard Specification for Standard Nominal Diameters and Cross-Sectional Areas of AWG Sizes of Solid Round Wires Used as Electrical Conductors. NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION 1300 NORTH 17TH STREET, SUITE 900 ROSSLYN. VA 22209www.NEMA.orgTO ORDER ADDITIONAL NEMA STANDARDS VISITWWW.GLOBAL.IHS.COM OR CALL 1-800-854-7179/1-303-397-79565612_0514TB
