1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL 1773Termination BoxesUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR
2、DISTRIBUTION WITHOUT PERMISSION FROM ULUL Standard for Safety for Termination Boxes, UL 1773Fifth Edition, Dated October 31, 2011Summary of TopicsThis new edition of ANSI/UL 1773 include the following changes in requirements:The Title Page now indicates that this standard is an American National Sta
3、ndard. Notechnical changes have been made to this standard.The new equirements are substantially in accordance with Proposal(s) on this subject dated August 19,2011.All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, ortransmitted in any form by any mean
4、s, electronic, mechanical photocopying, recording, or otherwisewithout prior permission of UL.UL provides this Standard as is without warranty of any kind, either expressed or implied, including butnot limited to, the implied warranties of merchantability or fitness for any purpose.In no event will
5、UL be liable for any special, incidental, consequential, indirect or similar damages,including loss of profits, lost savings, loss of data, or any other damages arising out of the use of or theinability to use this Standard, even if UL or an authorized UL representative has been advised of thepossib
6、ility of such damage. In no event shall ULs liability for any damage ever exceed the price paid forthis Standard, regardless of the form of the claim.Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold ULharmless from and against any loss, expense, liabi
7、lity, damage, claim, or judgment (including reasonableattorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronicStandard on the purchasers computer system.The requirements in this Standard are now in effect, except for those paragraphs, sections, tables
8、, figures,and/or other elements of the Standard having future effective dates as indicated in the note following theaffected item. The prior text for requirements that have been revised and that have a future effective dateare located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS
9、 notice.OCTOBER 31, 2011 UL 1773 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULOCTOBER 31, 2011 UL 1773tr2No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULOctober
10、 31, 20111UL 1773Standard for Termination BoxesPrevious numbered and unnumbered editions of standards covering terminationboxes have been published since 1988.First Edition April, 1988Second Edition May, 1993Third Edition April, 1998Fourth Edition August, 2007Fifth EditionOctober 31, 2011This ANSI/U
11、L Standard for Safety consists of the Fifth Edition.The most recent designation of ANSI/UL 1773 as an American National Standard(ANSI) occurred on October 31, 2011. ANSI approval for a standard does notinclude the Cover Page, Transmittal Pages, Title Page, or effective dateinformation.Comments or pr
12、oposals for revisions on any part of the Standard may besubmitted to UL at any time. Proposals should be submitted via a ProposalRequest in ULs On-Line Collaborative Standards Development System (CSDS)at http:/.ULs Standards for Safety are copyrighted by UL. Neither a printed nor electroniccopy of a
13、 Standard should be altered in any way. All of ULs Standards and allcopyrights, ownerships, and rights regarding those Standards shall remain thesole and exclusive property of UL.COPYRIGHT 2011 UNDERWRITERS LABORATORIES INC.ANSI/UL 1773-2011UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUC
14、TION ORDISTRIBUTION WITHOUT PERMISSION FROM ULOCTOBER 31, 2011TERMINATION BOXES - UL 17732No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .52 Components 53 Units of Measurement .64 Undated Refere
15、nces 65 Glossary .6CONSTRUCTION6 Enclosure 66.1 General .66.2 Conduit connections 76.3 Provision for support 86.4 Enclosures containing inlet assemblies 87 Mounting Post or Pedestal .97.1 General .97.2 Cover .97.3 Grade level .107.4 Wire opening .107.5 Instructions .107.6 Mounting provision 108 Vent
16、ilation Openings .109 Wire Bending Space .1210 Wiring Terminals 1510.1 General .1510.2 Tightening torque 1810.3 Screw terminals 1810.4 Multiple pole power inlets .1910.5 Single pole power inlets .1911 Current-Carrying Parts 2012 Termination Bases 2013 Bases Insulation Material 2014 Provision for Bon
17、ding and Grounding .2115 Spacings 2215.1 General .2215.2 Insulating barriers 25PERFORMANCE16 Short-Circuit Current Test 2717 Strength Test of Insulating Base and Support 2818 Dielectric Voltage-Withstand Test .2818.1 General .2818.2 Clamped insulating joint .2918.3 Insulating barriers 2919 Torque De
18、formation Test 2920 Beam Loading Deflection Test 3221 Deflection Test .3222 Conduit Connection Tests .33OCTOBER 31, 2011 TERMINATION BOXES - UL 1773 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL23 Inlet Assemblies 3323.1 General .3323.2 Te
19、mperature test inlet assemblies 33RATINGS24 General 3425 Short-Circuit Current 35MARKINGS26 General 3526.1 Location .3526.2 External conditions .3626.3 Terminals .3626.4 Short circuit 3726.5 Special openings .3826.6 Use on line side of service equipment 3926.7 Grade level 3926.8 Conduit connections
20、3926.9 Inlet assemblies 3927 Permanence of Marking .40APPENDIX AStandards for ComponentsA1OCTOBER 31, 2011TERMINATION BOXES - UL 17734UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements cover termination b
21、oxes rated 600 V or less that consist of lengths of bus bars,terminal strips, or terminal blocks with provision for wire connectors to accommodate incoming or outgoingconductors or both and are intended to be used in accordance with the National Electrical Code, NFPA70. Termination boxes are investi
22、gated for use on the line or load side of service equipment.1.2 The incoming and outgoing conductors may be routed through knockouts or openings in the box forcable, conduit, or electrical metallic tubing. The termination box may also have special openings to matchwith similar openings in other equi
23、pment such as meter sockets, panelboards, switch or circuit breakerenclosures, wireways, and the like.1.3 These requirements also cover termination bases to be field installed in termination boxes andtermination boxes in which termination bases are to be field installed.1.4 This category covers moun
24、ting posts and pedestals rated 600 V ac or less intended to serve as araceway for underground wiring that is being brought above grade to feed an outdoor electrical distributiondevice, such as a power outlet, panelboard, meter socket, circuit breaker enclosure or the like. They areintended to suppor
25、t the distribution device, which is installed either in the factory or in the field. They maycontain electrical termination points 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 outputcircui
26、ts, nor equipment containing switching devices, relays, or overcurrent protective devices. Theserequirements also do not cover busway fittings known as End Cable Tap Boxes which are covered bythe Standard for Busways, UL 857.2 Components2.1 Except as indicated in 2.2, a component of a product covere
27、d by this standard shall comply with therequirements for that component. See Appendix A for a list of standards covering components generallyused in the products covered by this standard.2.2 A component is not required to comply with a specific requirement that:a) Involves a feature or characteristi
28、c not required in the application of the component in theproduct covered by this standard, orb) Is superseded by a requirement in this standard.2.3 A component shall be used in accordance with its rating established for the intended conditions ofuse.2.4 Specific components are incomplete in construc
29、tion features or restricted in performance capabilities.Such components are intended for use only under limited conditions, such as certain temperatures notexceeding specified limits, and shall be used only under those specific conditions.OCTOBER 31, 2011 TERMINATION BOXES - UL 1773 5UL COPYRIGHTED
30、MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL3 Units of Measurement3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory orapproximate information.4 Undated References4.1 Any undated reference to a code or standa
31、rd appearing in the requirements of this standard shall beinterpreted as referring to the latest edition of that code or standard.5 Glossary5.1 For the purpose of this standard, the following definition applies.5.2 TERMINATION BASE An assembly mounted as a common structure constituting all theelemen
32、ts of a termination box except for the enclosure and intended for use in one or more specifictermination boxes.CONSTRUCTION6 Enclosure6.1 General6.1.1 Unless specified otherwise in this standard, a termination box enclosure shall comply with theStandard for Enclosures for Electrical Equipment, Non-E
33、nvironmental Considerations, UL 50.Exception No. 1: A termination box enclosure may be constructed with a special opening for connectionto other equipment if the termination box is marked as specified in 26.5.1 and the construction complieswith 6.1.2.Exception No. 2: A termination box intended for f
34、loor mounting or of a post or pedestal type may have anopen bottom.6.1.2 A termination box provided with special 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 inFigure 6.1.b) Means to close the end of an enclosure with an availa
35、ble fitting marked for use with thetermination box.This is generated text for figtxt.OCTOBER 31, 2011TERMINATION BOXES - UL 17736UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL6.2 Conduit connections6.2.1 A nonmetallic enclosure shall have a
36、bonding means provided to maintain continuity of groundingbetween all conduit openings. For a construction having a threaded opening or nipple for metal conduit,the bonding means shall be assembled to the enclosure. For a construction having a non-threadedopening, the bonding means may be provided a
37、s separate parts for field installation. An enclosureintended for field assembly of the bonding means shall be provided with instructions for installation. Theinstructions shall include the identification of the parts and their method of installation.Exception: The bonding means need not be provided
38、 in a nonmetallic enclosure not intended for use witha metallic conduit system if the enclosure is marked as specified in 26.8.1.6.2.2 A nonmetallic enclosure having provision for connection of rigid metallic conduit or rigid nonmetallicconduit shall be investigated for such use as specified in the
39、Conduit Connection Tests, Section 22.Figure 6.1Overlap at special openingOCTOBER 31, 2011 TERMINATION BOXES - UL 1773 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL6.3 Provision for support6.3.1 Provision for support or other mounting means
40、 for a nonmetallic termination box shall be outsidethe termination box, unless the termination box is constructed such that the conductors within the boxcannot contact the supporting screws.6.3.2 So that contact between a supporting screw and conductors within a box will be prevented asrequired in 6
41、.3.1, a hole in a box for a screw shall be located in a recess constructed such that there willbe a spacing of not less than 1/32 inch (0.8 mm) between the plane of the top of the recess and the headof the largest screw that is provided with the box. If a screw is not provided with a box, this spaci
42、ng shallbe measured using the largest:a) Round-head screw, specified in Table 6.1, that can be inserted in a hole that is notchamfered; orb) Flat-head screw that can be inserted in a hole that is chamfered.Table 6.1Supporting-screw hole dimensionsNominal screwsizeDiameter of hole, Minimum dimensions
43、 of recessDiameter, Depth,inch (mm) inch (mm) inch (mm)6 0.138 3.51 1/4 6.4 4/32 3.28 0.164 4.17 19/64 7.5 9/64 3.610 0.190 4.83 11/32 8.7 5/32 4.012 0.216 5.49 25/64 9.9 11/64 4.41/4 0.250 6.35 29/64 11.5 13/64 5.25/16 0.313 7.95 9/16 14.3 15/64 6.06.4 Enclosures containing inlet assemblies6.4.1 Al
44、l inlet assemblies shall be installed within the termination box such that the enclosure completelyencloses 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 internalte
45、rminal box wiring. Access to the inlet conductors shall be possible without exposing the internal terminalbox conductors or uninsulated live parts.6.4.3 The enclosure shall be such that when the covers and doors are properly secured, accidentalcontact with the body of all separable connectors is pre
46、vented.6.4.4 Access panels and doors provided for the attachment and removal of inlet conductors shall besecured by means of a latching mechanism incorporating a lock and key, a fastener requiring the use ofa tool, or shall have provision for locking.OCTOBER 31, 2011TERMINATION BOXES - UL 17738UL CO
47、PYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL6.4.5 Where intended for outdoor use, the enclosure shall comply with the requirements of the Standardfor Enclosures for Electrical Equipment, Non-Environmental Considerations, UL 50 and the Standard
48、forElectrical Equipment, Environmental Considerations, UL 50E for the intended use, with and without theinlet conductors connected.6.4.6 Marking and instructions on the exterior of an enclosure shall be permanent and suitable for theintended use. See Markings, Section 26.7 Mounting Post or Pedestal7
49、.1 General7.1.1 A mounting post or pedestal shall not be less than 12 square inches (77 cm2) in cross-sectionalarea and 2-1/2 inches (63.5 mm) deep, and at least three sides shall be fabricated of galvanized steel notless than 0.070 inch (1.8 mm) thick.Exception: A mounting post or pedestal that complies with the Torque Deformation Test, Section 19, andthe Beam Loading Deflection Test, Section 20, need not be 12 square inches in cross-sectional area orless than 2-1/2 inches deep, and may be fabricated of galvanized steel not less than 0
