1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 5B Strut-Type Channel Raceways and FittingsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FO
2、R FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Strut-Type Channel Raceways and Fittings, UL 5B Second Edition, Dated April 14, 2004 Summary of Topics This revision of ANSI/UL 5B is being issued to include the Addition of Xenon-arc Conditioning as an Opti
3、on to Carbon-arc. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. Changes in requirements are marked with a vertical line in the margin and are followed by an effective date note indicating the date of publication
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10、UPERSEDED REQUIREMENTS notice. AUGUST 1, 2014 UL 5B tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL AUGUST 1, 2014 UL 5B tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMI
11、SSION FROM UL APRIL 14, 2004 (Title Page Reprinted: August 1, 2014) 1 UL 5B Standard for Strut-Type Channel Raceways and Fittings Prior to the rst edition, the requirements for the products covered by this standard were included in the Standard for Surface Metal Raceways and Fittings, UL 5. First Ed
12、ition March, 1997 Second Edition April 14, 2004 This ANSI/UL Standard for Safety consists of the Second Edition including revisions through August 1, 2014. The most recent designation of ANSI/UL 5B as an American National Standard (ANSI) occurred on July 30, 2014. ANSI approval for a standard does n
13、ot include the Cover Page, Transmittal Pages, Title Page, or effective date information. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System
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15、2014 UNDERWRITERS LABORATORIES INC. ANSI/UL 5B-2014UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APRIL 14, 2004 STRUT-TYPE CHANNEL RACEWAYS AND FITTINGS - UL 5B 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRO
16、DUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .4 2 General 4 2.1 Components .4 2.2 Units of measurement .5 2.3 Undated references .5 2.4 Installation .5 2.5 Nonmetallic parts .5 2.6 Boxes .5 3 Glossary .5 CONSTRUCTION 4 General 6 5 Fittings 7 6 Wiring Devices .7 7
17、Grounding and Bonding 7 8 Specic Materials and Dimensional Limits 9 9 Corrosion Protection .9 9.1 General .9 9.2 Zinc coating 10 9.3 Nonmetallic coating 11 PERFORMANCE 10 Fixture Support Test 11 11 Receptacle Secureness Test .12 12 Security of Knockout Test 12 13 Thickness of Zinc Coating Test .12 1
18、4 Electrical Resistance Test .15 14.1 Measured on individual pieces .15 14.2 Measured across joints .15 15 Fault Current Test 15 16 Short Circuit Test .17 INSTALLATION INSTRUCTIONS 17 Details .17 MARKINGS 18 Details .18 APPENDIX A Standards for ComponentsA1 APRIL 14, 2004 STRUT-TYPE CHANNEL RACEWAYS
19、 AND FITTINGS - UL 5B 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover strut-type channel raceways and ttings for use only in dry locations and in accordance with the National Electrical Code
20、, NFPA 70. 1.2 Strut-type channel raceways of the following thicknesses are intended to enclose circuits operating at potentials not exceeding 600 volts between conductors: a) Strut-type channel raceways that are entirely of metal having a channel (base) at least 0.071 inch (1.81 mm) thick and a met
21、al closure strip (cover) at least 0.040 inch (1.02 mm) thick. b) Strut-type channel raceways consisting of a nonmetallic closure strip (cover) on a metal channel (base) of the thickness indicated in 1.2(a). 1.3 These requirements do not apply to cable trays, wireways, or surface metal or nonmetallic
22、 raceways. 2 General 2.1 Components 2.1.1 Except as indicated in 2.1.2, a component of a product covered by this standard shall comply with the requirements for that component. See Appendix A for a list of standards covering components used in the products covered by this standard. 2.1.2 A component
23、 is not required to comply with a specic requirement that: a) Involves a feature or characteristic not required in the application of the component in the product covered by this standard, or b) Is superseded by a requirement in this standard. 2.1.3 A component shall be used in accordance with its r
24、ating established for the intended conditions of use. 2.1.4 Specic components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specied limits, and shall be
25、 used only under those specic conditions. APRIL 14, 2004 STRUT-TYPE CHANNEL RACEWAYS AND FITTINGS - UL 5B 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2.2 Units of measurement 2.2.1 Values stated without parentheses are the requirement.
26、Values in parentheses are explanatory or approximate information. 2.3 Undated references 2.3.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. 2.4 Installation 2.4.1 The insta
27、llation of a strut-type channel raceway or tting, shall be practical and feasible under the conditions likely to be met in practice. The strut-type channel raceway, ttings and any wiring devices or accessories are to be installed as intended and examined with regard to the feasibility of installatio
28、n, as well as for compliance with the construction, performance, and marking requirements in this standard. Attention is to be given to items that require particular care on the part of the installer. 2.5 Nonmetallic parts 2.5.1 A nonmetallic closure strip (cover) or other non-metallic part shall co
29、mply with the applicable requirements in the Standard for Nonmetallic Surface Raceways and Fittings, UL 5A. 2.6 Boxes 2.6.1 Boxes shall comply with the Standard for Metallic Outlet Boxes, UL 514A. 3 Glossary 3.1 For the purposes of this standard, the following denitions apply: 3.2 ACCESSORY A part t
30、hat may be added to a strut-type channel raceway system for a special purpose (for example, guards, hangers, retainers). 3.3 BOX, FIXTURE A box that has been evaluated and determined to be capable of being used as the support of a lighting xture, lampholder, or other equipment intended for similar i
31、nstallation. 3.4 FITTING A part used to connect, change direction, or terminate a strut-type channel raceway (for example, a transition adapter, an end cap, a corner, a tee, a joiner, or a box). 3.5 NONMETALLIC A polymeric part. 3.6 RACEWAY, STRUT-TYPE CHANNEL A continuous metallic channel for surfa
32、ce or suspension mounting having inturned lips and a metal or nonmetallic closure strip. 3.7 RACEWAY SYSTEM A system consisting of a strut-type channel raceway, associated ttings and in some instances includes wiring devices and accessories. 3.8 WIRING DEVICE A part of an electrical system that is i
33、ntended to carry, provide a means of connection to or control of electrical energy within a raceway system (for example, switches or receptacles). APRIL 14, 2004 STRUT-TYPE CHANNEL RACEWAYS AND FITTINGS - UL 5B 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT
34、PERMISSION FROM UL CONSTRUCTION 4 General 4.1 A strut-type channel raceway system shall be constructed to facilitate compliance with the requirements for the installation of insulated wires and cables as given in the National Electrical Code, ANSI/NFPA 70. 4.2 A component of a strut-type channel rac
35、eway system shall comply with the requirements for the construction, performance, and use of that component. 4.3 A strut-type channel raceway shall consist of one or more pieces formed and constructed to make the raceway readily distinguishable from electrical conduit, tubing, and other raceway syst
36、ems. 4.4 A strut-type channel raceway system shall provide a complete enclosure that protects the wires installed therein against damage. The complete system, when installed as intended, shall comply with the following: a) There shall not be any openings that exceed 1/16 inch (1.59 mm) in width foll
37、owing installation of the system. b) A knockout shall completely cover the opening in which it is located, and the clearance between the knockout and the opening shall not be more than 0.030 inch (0.76 mm). 4.5 The interior surface of the strut-type channel raceway system shall have a smooth nish th
38、at is free from projections, sharp edges, burrs, ns, and other faults likely to damage wires when installed as intended. 4.6 The strut-type channel raceway shall have provisions for mounting as follows: a) Surface mounted Securement to the mounting surface by means of external retention straps at in
39、tervals not exceeding 10 feet (3.05 m) and within 3 feet (0.9 m) of a tting. b) Suspension mounted Suspension from the mounting surface by means of external hangers, threaded rods, or chains, or by means determined to be the equivalent, at intervals not exceeding 10 feet (3.05 m). 4.7 For strut-type
40、 channel raceways using conductors larger than No. 6 AWG (13.30 mm 2 ), the Short Circuit Test, Section 16, shall be performed on conductors in the raceway to determine whether the cover is secure. 4.8 Provision shall be made for securing the closure strip (cover) to the channel (base) of a two-piec
41、e strut-type channel raceway at intervals of not more than 4 feet (1.2 m). A closure strip (cover) that is held in place by continuous grooves, anges, or similar construction, shall securely x the closure strip in place. (See 4.9.) APRIL 14, 2004 STRUT-TYPE CHANNEL RACEWAYS AND FITTINGS - UL 5B 6UL
42、COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4.9 The closure strip (cover) of a strut-type channel raceway or tting shall be constructed so that the use of a tool (such as the prying action of a screwdriver) or two simultaneous deliberate ac
43、tions are necessary for their removal for gaining access to internal areas of the raceway after installation. 5 Fittings 5.1 A tting provided with means for the support of a xture shall have strength and rigidity for the purpose as evaluated by means of the tests described in the Fixture Support Tes
44、t, Section 10. A nipple intended only for the connection of a lampholder or the like is not to be considered means for the support of a xture. 5.2 A tting shall be secured to the raceway channel (base) by a positive securement means such as screws, rivets, or clamps. Exception: A tting may be secure
45、d by other than a positive securement means if it complies with the Fault Current Test, Section 15. 6 Wiring Devices 6.1 A receptacle shall be mounted by a positive means such as at least two screws or rivets. Exception: When a snap-t or other non-positive securement means is used it shall comply wi
46、th the Receptacle Secureness Test, Section 11. 6.2 A receptacle shall comply with all of the applicable requirements in the Standard for Attachment Plugs and Receptacles, UL 498. A ush switch shall comply with all of the applicable requirements in the Standard for General-Use Snap Switches, UL 20. 7
47、 Grounding and Bonding 7.1 Electrical continuity shall be provided between all metal parts of the strut-type channel raceway system when the parts are installed in the intended manner. See the Electrical Resistance Test, Section 14. 7.2 Each connection between adjacent raceway sections and between r
48、aceway sections and ttings of a strut-type channel raceway system shall not rely upon snap or friction t alone for electrical continuity. A means of positive securement shall be provided. Exception: It is not prohibited that a metal closure strip (cover) of a strut-type channel raceway or tting rely
49、 upon a snap t to achieve electrical continuity to the metal base. A receptacle mounted on a metal cover shall not rely upon the covers snap t for grounding continuity. 7.3 A strut-type channel raceway system shall be provided with means for grounding. This shall be provided at all points or with ttings intended for connection to a metallic wiring system. 7.4 A strut-type channel raceway system intended for connection to a nonmetallic wiring system shall have a tapped hole adjacent to e
