1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1773 Termination Boxes STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR
2、 FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Termination Boxes, UL 1773 Fifth Edition, Dated October 31, 2011 Summary of Topics This revision to ANSI/UL 1773 include the following changes in requirements: Revisions to introduce requirements for self-ill
3、uminated mounting posts and pedestals and to incorporate a reference to the Rain and Splash Test detailed in the Standard for Power Outlets, UL 231. 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 requi
4、rements are marked with a vertical line in the margin and are followed by an effective date note indicating the date of publication or the date on which the changed requirement becomes effective. The new and revised requirements are substantially in accordance with Proposal(s) on this subject dated
5、February 26, 2016. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides this Standard as is without warranty
6、of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or tness for any purpose. In no event will UL be liable for any special, incidental, consequential, indirect or similar damages, including loss of prots, lost savings, loss of data, or a
7、ny other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid for this Standard, regardless of the form of t
8、he claim. Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is
9、storing an electronic Standard on the purchasers computer system. APRIL 29, 2016 UL 1773 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APRIL 29, 2016 UL 1773 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REP
10、RODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 31, 2011 (Title Page Reprinted: April 29, 2016) 1 UL 1773 Standard for Termination Boxes Previous numbered and unnumbered editions of standards covering termination boxes have been published since 1988. First Edition April, 1988 Second Edi
11、tion May, 1993 Third Edition April, 1998 Fourth Edition August, 2007 Fifth Edition October 31, 2011 This ANSI/UL Standard for Safety consists of the Fifth Edition including revisions through April 29, 2016. The most recent designation of ANSI/UL 1773 as an American National Standard (ANSI) occurred
12、on April 29, 2016. The ANSI approval for this standard does not 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 Reque
13、st in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards s
14、hall remain the sole and exclusive property of UL. COPYRIGHT 2016 UNDERWRITERS LABORATORIES INC. ANSI/UL 1773-2016UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APRIL 29, 2016 TERMINATION BOXES - UL 1773 2 No Text on This PageUL COPYRIGHTED
15、 MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 Components 5 3 Units of Measurement .6 4 Undated References 6 5 Glossary .6 CONSTRUCTION 6 Enclosure 6 6.1 General .6 6.2 Conduit connections 7 6.3 Provision for support 8
16、6.4 Enclosures containing inlet assemblies 8 7 Mounting Post or Pedestal .9 7.1 General .9 7.2 Cover .9 7.3 Grade level .10 7.4 Wire opening .10 7.5 Instructions .10 7.6 Mounting provision 10 7.7 Luminaires (illuminated mounting posts and pedestals) 10 8 Ventilation Openings 10A 9 Wire Bending Space
17、 .12 10 Wiring Terminals 15 10.1 General .15 10.2 Tightening torque 18 10.3 Screw terminals 18 10.4 Multiple pole power inlets .19 10.5 Single pole power inlets .19 11 Current-Carrying Parts 20 12 Termination Bases 20 13 Bases Insulation Material 20 14 Provision for Bonding and Grounding .21 15 Spac
18、ings 22 15.1 General .22 15.2 Insulating barriers 25 PERFORMANCE 16 Short-Circuit Current Test 27 17 Strength Test of Insulating Base and Support 28 18 Dielectric Voltage-Withstand Test .28 18.1 General .28 18.2 Clamped insulating joint .29 18.3 Insulating barriers 29 19 Torque Deformation Test 29 2
19、0 Beam Loading Deection Test 32 21 Deection Test .32 APRIL 29, 2016 TERMINATION BOXES - UL 1773 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 22 Conduit Connection Tests .33 22A Rain and Splash Test .33 23 Inlet Assemblies 33 23.1 General
20、 .33 23.2 Temperature test inlet assemblies 33 23A Illuminated Mounting Posts and Pedestals 34A 23A.1 Temperature test 34A RATINGS 24 General 34A 25 Short-Circuit Current 35 MARKINGS 26 General 35 26.1 Location .35 26.2 External conditions .36 26.3 Terminals .36 26.4 Short circuit 37 26.5 Special op
21、enings .38 26.6 Use on line side of service equipment 39 26.7 Grade level 39 26.8 Conduit connections 39 26.9 Inlet assemblies 39 26.10 Illuminated mounting posts and pedestals .40 27 Permanence of Marking .41 APPENDIX A Standards for ComponentsA1 APRIL 29, 2016 TERMINATION BOXES - UL 1773 4UL COPYR
22、IGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover termination boxes rated 600 V or less that consist of lengths of bus bars, terminal strips, or terminal blocks with provision for wire connectors to ac
23、commodate incoming or outgoing conductors or both and are intended to be used in accordance with the National Electrical Code, NFPA 70. Termination boxes are investigated for use on the line or load side of service equipment. 1.2 The incoming and outgoing conductors may be routed through knockouts o
24、r openings in the box for cable, conduit, or electrical metallic tubing. The termination box may also have special openings to match with similar openings in other equipment such as meter sockets, panelboards, switch or circuit breaker enclosures, wireways, and the like. 1.3 These requirements also
25、cover termination bases to be eld installed in termination boxes and termination boxes in which termination bases are to be eld installed. 1.4 This category covers mounting posts and pedestals rated 600 V ac or less intended to serve as a raceway for underground wiring that is being brought above gr
26、ade to feed an outdoor electrical distribution device, such as a power outlet, panelboard, meter socket, circuit breaker enclosure or the like. They are intended to support the distribution device, which is installed either in the factory or in the eld. They may contain electrical termination points
27、 for underground wiring and for wiring to the distribution device. 1.5 These requirements do not cover equipment connected only by bus bars for both input and output circuits, nor equipment containing switching devices, relays, or overcurrent protective devices. These requirements also do not cover
28、busway ttings known as End Cable Tap Boxes which are covered by the Standard for Busways, UL 857. 2 Components 2.1 Except as indicated in 2.2, 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 comp
29、onents generally used in the products covered by this standard. 2.2 A component 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 require
30、ment in this standard. 2.3 A component shall be used in accordance with its rating established for the intended conditions of use. 2.4 Specic components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditio
31、ns, such as certain temperatures not exceeding specied limits, and shall be used only under those specic conditions. OCTOBER 31, 2011 TERMINATION BOXES - UL 1773 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3 Units of Measurement 3.1 Val
32、ues stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 4 Undated References 4.1 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 co
33、de or standard. 5 Glossary 5.1 For the purpose of this standard, the following denition applies. 5.2 TERMINATION BASE An assembly mounted as a common structure constituting all the elements of a termination box except for the enclosure and intended for use in one or more specic termination boxes. CO
34、NSTRUCTION 6 Enclosure 6.1 General 6.1.1 Unless specied otherwise in this standard, a termination box enclosure shall comply with the Standard for Enclosures for Electrical Equipment, Non-Environmental Considerations, UL 50. Exception No. 1: A termination box enclosure may be constructed with a spec
35、ial opening for connection to other equipment if the termination box is marked as specied in 26.5.1 and the construction complies with 6.1.2. Exception No. 2: A termination box intended for oor mounting or of a post or pedestal type may have an open bottom. 6.1.2 A termination box provided with spec
36、ial openings shall be provided with: a) Mating surfaces of at least 3/8 inch (9.5 mm) on each side of the opening as shown in Figure 6.1. b) Means to close the end of an enclosure with an available tting marked for use with the termination box. This is generated text for gtxt. OCTOBER 31, 2011 TERMI
37、NATION BOXES - UL 1773 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 6.2 Conduit connections 6.2.1 A nonmetallic enclosure shall have a bonding means provided to maintain continuity of grounding between all conduit openings. For a constru
38、ction having a threaded opening or nipple for metal conduit, the bonding means shall be assembled to the enclosure. For a construction having a non-threaded opening, the bonding means may be provided as separate parts for eld installation. An enclosure intended for eld assembly of the bonding means
39、shall be provided with instructions for installation. The instructions shall include the identication of the parts and their method of installation. Exception: The bonding means need not be provided in a nonmetallic enclosure not intended for use with a metallic conduit system if the enclosure is ma
40、rked as specied in 26.8.1. 6.2.2 A nonmetallic enclosure having provision for connection of rigid metallic conduit or rigid nonmetallic conduit shall be investigated for such use as specied in the Conduit Connection Tests, Section 22. Figure 6.1 Overlap at special opening OCTOBER 31, 2011 TERMINATIO
41、N BOXES - UL 1773 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 6.3 Provision for support 6.3.1 Provision for support or other mounting means for a nonmetallic termination box shall be outside the termination box, unless the termination b
42、ox is constructed such that the conductors within the box cannot contact the supporting screws. 6.3.2 So that contact between a supporting screw and conductors within a box will be prevented as required in 6.3.1, a hole in a box for a screw shall be located in a recess constructed such that there wi
43、ll be a spacing of not less than 1/32 inch (0.8 mm) between the plane of the top of the recess and the head of the largest screw that is provided with the box. If a screw is not provided with a box, this spacing shall be measured using the largest: a) Round-head screw, specied in Table 6.1, that can
44、 be inserted in a hole that is not chamfered; or b) Flat-head screw that can be inserted in a hole that is chamfered. Table 6.1 Supporting-screw hole dimensions Nominal screw size Diameter of hole, Minimum dimensions of recess Diameter, Depth, inch (mm) inch (mm) inch (mm) 6 0.138 3.51 1/4 6.4 4/32
45、3.2 8 0.164 4.17 19/64 7.5 9/64 3.6 10 0.190 4.83 11/32 8.7 5/32 4.0 12 0.216 5.49 25/64 9.9 11/64 4.4 1/4 0.250 6.35 29/64 11.5 13/64 5.2 5/16 0.313 7.95 9/16 14.3 15/64 6.0 6.4 Enclosures containing inlet assemblies 6.4.1 All inlet assemblies shall be installed within the termination box such that
46、 the enclosure completely encloses all uninsulated parts, both with and without the inlet cables connected to the assembly. 6.4.2 Where used to connect inlet conductors, enclosures shall separate inlet conductors from internal terminal box wiring. Access to the inlet conductors shall be possible wit
47、hout exposing the internal terminal box conductors or uninsulated live parts. 6.4.3 The enclosure shall be such that when the covers and doors are properly secured, accidental contact with the body of all separable connectors is prevented. 6.4.4 Access panels and doors provided for the attachment an
48、d removal of inlet conductors shall be secured by means of a latching mechanism incorporating a lock and key, a fastener requiring the use of a tool, or shall have provision for locking. OCTOBER 31, 2011 TERMINATION BOXES - UL 1773 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR
49、DISTRIBUTION WITHOUT PERMISSION FROM UL 6.4.5 Where intended for outdoor use, the enclosure shall comply with the requirements of the Standard for Enclosures for Electrical Equipment, Non-Environmental Considerations, UL 50 and the Standard for Electrical Equipment, Environmental Considerations, UL 50E for the intended use, with and without the inlet conductors connected. 6.4.6 Marking and instructions on the exterior of an enclosure shall be permanent and suitable for the intended use. See Marking
