NEMA RV 4-2016 Application and Installation Guidelines for Service-Entrance Cable.pdf

1、NEMA Standards PublicationNational Electrical Manufacturers AssociationNEMA RV 4-2016Application and Installation Guidelines for Service-Entrance CableNEMA Standards Publication RV 4-2016 Application and Installation Guidelines for Service-Entrance Cable Published by: National Electrical Manufacture

2、rs Association 1300 North 17th Street, Suite 900 Rosslyn, Virginia 22209 www.nema.org 2016 National Electrical Manufacturers Association. All rights, including translation into other languages, reserved under the Universal Copyright Convention, the Berne Convention for the Protection of Literary and

3、 Artistic Works, and the International and Pan American copyright conventions. The NEC excerpts shown herein are reprinted with permission from NFPA 70-2017, National Electrical Code, 2016, National Fire Protection Association, Quincy, MA. This reprinted material is not the complete and official pos

4、ition of the NFPA on the referenced subject, which is represented only by the standard in its entirety. 2016 National Electrical Manufacturers Association NOTICE AND DISCLAIMER The information in this publication was considered technically sound by the consensus of persons engaged in the development

5、 and approval of the document at the time it was developed. Consensus does not necessarily mean that there is unanimous agreement among every person participating in the development of this document. The National Electrical Manufacturers Association (NEMA) standards and guideline publications, of wh

6、ich the document contained herein is one, are developed through a voluntary consensus standards development process. This process brings together volunteers and/or seeks out the views of persons who have an interest in the topic covered by this publication. While NEMA administers the process and est

7、ablishes rules to promote fairness in the development of consensus, it does not write the document and it does not independently test, evaluate, or verify the accuracy or completeness of any information or the soundness of any judgments contained in its standards and guideline publications. NEMA dis

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9、warranty, express or implied, as to the accuracy or completeness of any information published herein, and disclaims and makes no warranty that the information in this document will fulfill any of your particular purposes or needs. NEMA does not undertake to guarantee the performance of any individua

10、l manufacturer or sellers products or services by virtue of this standard or guide. In publishing and making this document available, NEMA is not undertaking to render professional or other services for or on behalf of any person or entity, nor is NEMA undertaking to perform any duty owed by any per

11、son or entity to someone else. Anyone using this document should rely on his or her own independent judgment or, as appropriate, seek the advice of a competent professional in determining the exercise of reasonable care in any given circumstances. Information and other standards on the topic covered

12、 by this publication may be available from other sources, which the user may wish to consult for additional views or information not covered by this publication. NEMA has no power, nor does it undertake to police or enforce compliance with the contents of this document. NEMA does not certify, test,

13、or inspect products, designs, or installations for safety or health purposes. Any certification or other statement of compliance with any health or safety-related information in this document shall not be attributable to NEMA and is solely the responsibility of the certifier or maker of the statemen

14、t. NEMA RV 4-2016 Page i 2016 National Electrical Manufacturers Association CONTENTS Foreword . ii Section 1 Application Guidelines for Service-Entrance Cable 1 1.1 Construction 1 1.1.1 General . 1 1.1.2 Insulated Conductors 1 1.1.3 Grounding Conductors 1 1.1.4 Separators . 1 1.1.5 Fillers . 1 1.1.6

15、 Coverings 1 1.2 Grounding . 2 1.2.1 Grounding Conductor 2 1.2.2 Polarity 2 1.3 Marking . 2 1.3.1 General . 2 1.3.2 Cable, Tag, or Package 2 1.3.3 Circuit Conductors. 2 1.3.4 Grounding Conductors 2 1.4 Codes and Standards . 2 1.4.1 NEC . 2 1.4.2 UL Standards and Directory 4 Section 2 Installation Gu

16、idelines for Type SE Cable 8 2.1 NEC Requirements for Installation of Service-Entrance Conductors . 8 2.2 NEC Requirements for Installation as Branch Circuits or Feeders 11 2.2.1 Securing and Supporting 11 2.2.2 Special Installation ConsiderationsExposed Work 11 2.2.3 Unfinished Basements and Crawl

17、Spaces 12 2.2.4 Accessible Attics . 12 2.2.5 Unsupported Cable . 12 2.2.6 Ampacity . 12 Section 3 Installation Techniques . 13 3.1 Cable Preparation and Fitting Assembly Technique 13 3.1.1 Inserting Type SE Cable . 13 3.1.2 Cable Jacket Removal 13 3.1.3 Seating a Securement Clamp . 13 3.1.4 Screw Ti

18、ghtening Torque 14 3.2 Attachment to Boxes and Support 14 3.2.1 Attachment to Unthreaded Entries 14 3.2.2 Attachment to Threaded Entries . 14 3.2.3 Supports 14 3.3 Verification of Installation 15 3.4 Maintenance . 16 3.5 Damage 16 3.5.1 Physical Damage 16 3.5.2 Flood Damage . 16 NEMA RV 4-2016 Page

19、ii 2016 National Electrical Manufacturers Association Foreword These application and installation guidelines offer practical information on correct application and industry-recommended practices for service-entrance cable installation in accordance with the National Electrical Code(NEC). They addres

20、s service masts, sunlight resistance, submerged cable, conduit markings, aerial installation, suitability for branch and feeder circuits, termination requirements in wet locations, and important changes for the 2017 NEC. These guidelines have been developed by the NEMA Building Wire and Cable Sectio

21、n, which has committed to periodically reviewing them for any revisions necessary to address changing conditions, product listing and installation requirements, and technical progress. Comments for proposed revisions are welcomed and should be submitted to: Senior Technical Director, Operations Nati

22、onal Electrical Manufacturers Association 1300 North 17th Street, Suite 900 Rosslyn, VA 22209 At the time of approval, the Building Wire and Cable Section of the National Electrical Manufacturers Association had the following members: AFC Cable Systems, Inc., a part of Atkore InternationalNew Bedfor

23、d, MA Anamet Electrical, Inc.Mattoon, IL Cerro Wire LLCHartselle, AL Colonial Wire they also provide information on special or optional ratings as well as terminations. Website resources: a. Underwriters Laboratories operates a website at . This website contains online versions of their directories

24、as well as other general information relating to ULs products and services. See below for more information on UL websites. b. CSA maintains a website at www.csagroup.org. Click on “Certified Product Listing” to search product listings and learn about the CSA mark. c. Intertek also operates a website

25、 at Click on “Product Directories” to search the ETL directories. 1.4.2.3 UL Certification Category Guide Information and Certifications on Website UL publishes Guide Information for each certification product category that contains useful information on the products that it lists, classifies, cert

26、ifies, and recognizes. The certification category Guide Information is frequently used by installers and inspection authorities to gain a better understanding of how to specify and install products in accordance with their certifications. All of this information is readily available on ULs Online Ce

27、rtifications Directory ( and UL Product Spec ( The category should be chosen based on the information available to you. The keyword or product type search is the easiest way to start if limited information is available. These websites are helpful tools for locating the certification category Guide I

28、nformation for products; understanding the details of how products, in this case service-entrance cable, are constructed and marked; and obtaining information on special or optional ratings as well as terminations. The certification category Guide Information for Service-entrance Cable (TYLZ) is rep

29、rinted below. The UL Fire Resistance Directory covers the UL-certified methods for maintaining the fire-resistive rating on walls, floors, and ceilings for fire-resistive-rated construction, when cable must penetrate them and be fire-stopped. The following information on service-entrance cable is re

30、printed from the Online Certifications Directory with permission from UL 2017 UL LLC: Service-entrance Cable (TYLZ) General This category covers service-entrance cable designated Type SE and Type USE for use in accordance with Article 338 of ANSI/NFPA 70, “National Electrical Code“ (NEC). Service-en

31、trance cable, rated 600 V, is certified in sizes 14 AWG and larger for copper, and 12 AWG and larger for aluminum or copper-clad aluminum. The cable is designated as follows: Type SE Indicates cable for aboveground installation. Both the individual insulated conductors and the outer jacket or finish

32、 of Type SE are suitable for use where exposed to sun. Type SE cable contains Type RHW, RHW-2, XHHW, XHHW-2, THWN or THWN-2 conductors. Maximum size is 4/0 AWG copper or 300 kcmil aluminum or copper-clad aluminum. Types USE and USE-2 Indicates cable for underground installation including direct buri

33、al in the earth. Maximum size is 2000 kcmil. Cable in sizes 4/0 AWG copper, aluminum or copper-clad aluminum and smaller and having all conductors insulated is suitable for all of the underground uses for which Type UF NEMA RV 4-2016 Page 6 2016 National Electrical Manufacturers Association cable is

34、 permitted by the NEC. Multiconductor Type USE cable contains conductors with insulation equivalent to RHW or XHHW. Multiconductor Type USE-2 contains insulation equivalent to RHW-2 or XHHW-2 and is rated 90C wet or dry. Single- and multiconductor Types USE and USE-2 are not suitable for use in prem

35、ises. Single- and multiconductor Types USE and USE-2 are not suitable aboveground except to terminate at the service equipment or metering equipment. Both the insulation and the outer covering, when used, on single- and multiconductor Types USE and USE-2, are suitable for use where exposed to sun. S

36、ubmersible Water Pump Cable Indicates a multiconductor cable in which 2, 3 or 4 single-conductor Type USE or USE-2 cables are provided in a flat or twisted assembly. The cable is certified in sizes 14 AWG to 4/0 AWG inclusive, copper, and 12 AWG to 4/0 AWG inclusive, aluminum or copper-clad aluminum

37、 The cable is tag marked “For use within the well casing for wiring deep-well water pumps where the cable is not subject to repetitive handling caused by frequent servicing of the pump units.“ The insulation may also be surface marked “Pump Cable.“ The cable may be directly buried in the earth in c

38、onjunction with this use. For termination information, see Electrical Equipment for Use in Ordinary Locations (AALZ). Based upon tests which have been made involving the maximum heating that can be produced, an uninsulated conductor employed in a service cable assembly is considered to have the same

39、 current-carrying capacity as the insulated conductors even though it may be smaller in size. Product Markings The Type designation of the conductors may be marked on the surface of the cable. When used, this marking indicates that the temperature rating for the cable corresponds to the temperature

40、rating of the conductors. When this marking does not appear, the temperature rating of the cable is 75C. Cable acceptable for installation in cable trays is so marked. Wire and cable may be surface marked with the suffix “HF“ when it has been determined that all of the combustible materials used in

41、the construction (e.g., insulation, fillers, jackets) are halogen free in accordance with UL 2885, “Outline of Investigation for Acid Gas, Acidity and Conductivity of Combusted Materials.“ Wire and cable that meets the requirements for “HF“ indicated above and that also complies with the requirement

42、s for low smoke when tested in accordance with IEC 61034-2, “Measurement of Smoke Density of Cables Burning Under Defined Conditions - Part 2: Test Procedure and Requirements,“ may be surface marked with the suffix “LSHF.“ Cable may employ copper, aluminum, or copper-clad aluminum conductors. Cable

43、with copper-clad aluminum conductors is surface printed “AL (CU-CLAD)“ or “Cu-Clad Al.“ Cable with aluminum conductors is surface printed “AL.“ Cable employing compact-stranded copper conductors is so identified directly following the conductor size, wherever it appears (surface, tag, carton or reel

44、) by “compact copper.“ The abbreviations “CMPCT“ and “CU“ may be used for compact and copper, respectively. Tags, reels and cartons for products employing compact-stranded copper conductors have the marking: “Terminate with connectors identified for use with compact-stranded copper conductors.“ NEMA

45、 RV 4-2016 Page 7 2016 National Electrical Manufacturers Association Product Identity One of the following product identities appears on the product: a. Aluminum Service-entrance Cable (for service-entrance cable that contains aluminum conductors) b. Service-entrance Cable (for service-entrance cabl

46、e that contains copper or copper-clad aluminum conductors) Additional Information For additional information, see Electrical Equipment for Use in Ordinary Locations (AALZ). Requirements The basic standard used to investigate products in this category is ANSI/UL 854, “Service-Entrance Cables.“ UL Mar

47、k The UL symbol on the product and the Certification Mark of UL on the attached tag, coil, reel, or on the smallest unit container in which the product is packaged is the only method provided by UL to identify products manufactured under its Certification and Follow-Up Service. The Certification Mar

48、k for these products includes the UL symbol, the words “CERTIFIED“ and “SAFETY,“ the geographic identifier(s), and a file number. Alternate UL Mark The UL symbol on the product and the Listing Mark of UL on the attached tag, coil, reel or smallest unit container in which the product is packaged is t

49、he only method provided by UL to identify products manufactured under its Listing and Follow-Up Service. The Listing Mark for these products includes the UL symbol (as illustrated in the Introduction of this Directory) together with the word “LISTED,“ a control number, and the product name as appropriate: Service-entrance cable that contains copper or copper-clad aluminum conductor(s) has the product name “Service-Entrance Cable“; service-entrance cable that contains aluminum condu