UL 414-2016 UL Standard for Safety Meter Sockets (Ninth Edition Reprint with revisions through and including July 24 2018).pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 414 Meter SocketsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR

2、DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Meter Sockets, UL 414 Eighth Edition, Dated January 5, 2016 SUMMARY OF TOPICS This new edition of UL 414 was issued to incorporate the following changes: 1. Addition of Requirements for Clamping Jaw Designs for Meter Sockets to Parag

3、raph 4.15 The new and revised requirements are substantially in accordance with Proposal(s) on this subject dated October 30, 2015. 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 photoc

4、opying, recording, or otherwise without prior permission of UL. UL provides this Standard as is without warranty 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,

5、incidental, consequential, indirect or similar damages, including loss of prots, lost savings, loss of data, or any 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 e

6、vent shall ULs liability for any damage ever exceed the price paid for this Standard, regardless of the form of the 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 ju

7、dgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. JANUARY 5, 2016 UL 414 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISS

8、ION FROM UL JANUARY 5, 2016 UL 414 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JANUARY 5, 2016 1 UL 414 Standard for Meter Sockets First Edition October, 1957 Second Edition May, 1973 Third Edition August, 1974 Fo

9、urth Edition January, 1979 Fifth Edition December, 1986 Sixth Edition May, 1994 Seventh Edition March, 1999 Eighth Edition December, 2009 Ninth Edition January 5, 2016 This ANSI/UL Standard for Safety consists of the Ninth Edition. The most recent designation of ANSI/UL 414 as an American National S

10、tandard (ANSI) occurred on January 5, 2016. ANSI approval for a standard does not include the Cover Page, Transmittal Pages and Title Page. The Department of Defense (DoD) has adopted UL 414 on November 20, 1987. The publication of revised pages or a new edition of this Standard will not invalidate

11、the DoD adoption. 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 (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neith

12、er 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 shall remain the sole and exclusive property of UL. COPYRIGHT 2016 UNDERWRITERS LABORATORIES INC. ANSI/UL 414-2016UL COPYRIGHTED MATE

13、RIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JANUARY 5, 2016 METER SOCKETS - UL 414 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .7 2 General 8

14、 2.1 Components .8 2.2 Units of measurement .8 2.3 Undated references .9 ALL METER SOCKETS AND METERING TRANSFORMER CABINETS CONSTRUCTION 3 General 9 4 Enclosure 9 5 Bases Insulating Material .13 6 Current-Carrying Parts 15 6.1 General 15 6.2 Washers .17 6.3 Test blocks .18 7 Wiring Terminals .20 8

15、Spacings 24 9 Barriers .27 9.1 Insulating barriers .27 9.2 Restricting barriers 29 9.3 Isolating barriers 30 10 Wire-Bending Distance 30 11 Wiring Space .36 12 Provisions for Bonding and Grounding 37 PERFORMANCE 13 General 39 14 Heating Test .39 15 Short-Circuit Current Test 50 16 Short-Circuit Curr

16、ent Test with Specic Circuit Breaker 52 16.1 General .52 16.2 Test circuit calibration .53 16.3 Sample preparation .53 16.4 Closing .55 16.5 Peak let-through current .55 17 Rain Test 55 18 Concentric Knockout Rain Test .55 19 Insertion and Withdrawal Force Test for Meter Jaws 56 20 Dielectric Voltag

17、e-Withstand Test .56 20.1 General .56 20.2 Insulating barriers 57 21 Clamped Insulating Joint Test 57 22 Bonding Continuity Test .57 23 Test of Insertion and Withdrawal Force on Meter Base 58 24 Strength Test of Insulating Base and Support 58 JANUARY 5, 2016 METER SOCKETS - UL 414 3UL COPYRIGHTED MA

18、TERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 25 Test of Torque and Force on Test Block .59 RATINGS 26 Voltage and Current Ratings .59 MARKINGS 27 General 60 27.1 Location .60 27.2 Identication .60 27.3 Ratings .61 27.4 Enclosure .62 27.5 Top (overhead) or

19、 bottom (underground) feed .62 27.6 Accessories .63 27.7 Circuit closers and disconnects 63 27.8 Neutral 64 27.9 Field installation 64 27.10 Terminals 64 27.11 Test blocks .66 27.12 Short circuit ratings 66 27.13 Low voltage rating .67 28 Permanence of Marking .67 POST AND PEDESTAL TYPE METER SOCKET

20、S CONSTRUCTION 29 General 67 30 Enclosure 69 31 Ventilation Openings 70 32 Mounting 72 33 Grounding .72 34 Grade Level 72 PERFORMANCE 35 Sprinkler Test 73 36 Crushing Deformation Test .73 37 Torque Deformation Test 74 38 Beam Loading Deection Test 76 MARKINGS 39 Post Type Enclosures .78 40 Pedestal

21、Type Enclosures .78 METERING TRANSFORMER CABINETS AND METERING TRANSFORMER CABINET INTERIORS GENERAL 41 Details .78 JANUARY 5, 2016 METER SOCKETS - UL 414 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONSTRUCTION 42 General 79 42.1 Cabin

22、ets and interiors .79 42.2 Bus-to-bus and bus-to-wire connections .79 42.3 Sizing of bus bars 79 42.4 Spacings 79 PERFORMANCE 43 Short-Circuit Test Performed .80 43.1 General .80 43.2 Tensile force .81 43.3 Cantilever force 81 44 Short-Circuit Test Not Performed .82 44.1 General .82 44.2 Constructio

23、n .82 44.3 Supports 88 44.4 Bus bar rotation 91 RATINGS 45 Details .91 MARKINGS 46 Details .91 TEST SWITCHES GENERAL 47 Details .92 CONSTRUCTION 48 General 93 PERFORMANCE 49 Temperature Test .93 SUPPLEMENT SA - METER SOCKET ADAPTERS SA1 Scope SA1 SA2 General SA1 SA3 General SA1 SA4 Heating Test SA2

24、SA5 Short-Circuit Current Test .SA2 SA6 General SA2 SA7 Instructions .SA4 JANUARY 5, 2016 METER SOCKETS - UL 414 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APPENDIX A Standards for ComponentsA1 APPENDIX B (Informative) Explanatory Info

25、rmation Regarding Wire-Bending Distance B1 General .B1 JANUARY 5, 2016 METER SOCKETS - UL 414 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover meter sockets for use with: a) Watthour and simi

26、lar meters; b) Test switches; c) Metering transformer cabinets; and d) Metering transformer cabinet interiors for installation in accordance with the National Electrical Code, NFPA 70. 1.2 Meter sockets are marked with a continuous duty ampere rating and may in addition have a maximum use (intermitt

27、ent) ampere rating of 125 percent or less of the continuous duty ampere rating. 1.3 A meter socket, as covered by these requirements, is an assembly of wiring terminals and jaw type contacts for one or more plug-in watthour meters in an enclosure having provisions for securing the meter to the socke

28、t. 1.4 Some meter sockets may be housed in a metal pedestal enclosure intended for mounting on a concrete slab or in a metal post enclosure intended to be sunk in the ground with or without concrete poured around the post at ground level and either self-supported or intended for separate support. Su

29、ch posts or pedestals are not intended to serve as the sole support of masts for overhead wiring. 1.5 Some meter sockets may be intended for mounting on a mounting post or pedestal for distribution equipment. 1.6 As covered by these requirements, a meter socket does not include: a) A meter, b) An ov

30、ercurrent device, c) An instrument transformer, d) An arcing or switching part, or e) A similar component. A meter socket does not have provision for installation of instrument transformers within the meter socket enclosure. JANUARY 5, 2016 METER SOCKETS - UL 414 7UL COPYRIGHTED MATERIAL NOT AUTHORI

31、ZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 1.7 These requirements cover meter sockets rated: a) 300 volts alternating current or less, or 600 volts alternating current and b) 400 amperes maximum per meter position. 1.8 These requirements cover metering transformer cabine

32、ts and metering transformer cabinet interiors rated maximum 6000 amperes at maximum 600 volts. 1.9 As covered by these requirements, a metering transformer cabinet or metering transformer cabinet interior does not include the current transformers. 2 General 2.1 Components 2.1.1 Except as indicated i

33、n 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 generally used in the products covered by this standard. 2.1.2 A component is not required to comply with a specic requirement

34、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 rating established for the intended conditions of use.

35、 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 used only under those specic conditions. 2.2 Units o

36、f measurement 2.2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 2.2.2 Unless indicated otherwise, voltages and current values mentioned in this standard are root-mean-square (rms). JANUARY 5, 2016 METER SOCKETS - UL 414 8UL

37、 COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 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 sta

38、ndard. ALL METER SOCKETS AND METERING TRANSFORMER CABINETS CONSTRUCTION 3 General 3.1 Unless otherwise noted specically in this standard, all parts shall be assembled in place when the equipment is shipped from the factory. Internal connections between factory installed components shall be completed

39、. 3.2 If a meter socket, metering transformer cabinet, or metering transformer is intended for use with or without an accessory assembly, the accessory assembly need not be shipped from the factory with the product if: a) The accessory assembly is shipped from the factory assembled as far as practic

40、able, together with mounting screws, barriers, or the like, and installation instructions; b) The assembly itself is complete and needs no parts to make it ready for installation; and c) The accessory assembly is identied in accordance with 27.6.1 27.6.3. 3.3 For posts and pedestal type meter socket

41、s, the requirements of Sections 29 40 apply in addition to the requirements for all meter sockets. 3.4 A meter socket provided with a circuit closer or disconnect shall be marked, as applicable, in accordance with 27.7.1 27.7.3. 4 Enclosure 4.1 An enclosure shall comply with the requirements of the

42、Standard for Enclosures for Electrical Equipment, UL 50, unless modied by additional requirements as specically described in this standard and shall be marked in accordance with 27.4.1. 4.2 In a cast metal enclosure intended for one meter, there may be an indication of location in the rear wall for

43、an additional conduit connection. This indication may be in the form of a breakout with a reduced thickness to not less than 0.020 inch (0.51 mm), but shall not be a knockout nor shall it be for more than one size of conduit. Exception: A concentric type breakout for a 1-1/4 inch trade size conduit

44、and for one smaller trade size conduit may be provided in a cast metal enclosure. JANUARY 5, 2016 METER SOCKETS - UL 414 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4.3 Breakouts and knockouts shall be located so as not to result in int

45、erference with terminals or mounting screw holes or to cause reduction in minimum spacings when conduit ttings are in place. 4.4 In a single-meter sheet metal enclosure, a single non-concentric knockout may be located above the line of the lowest live part, provided the knockout, after formation is

46、pushed back essentially ush with the wall. 4.5 In a single-meter enclosure a single concentric knockout may be located above the line of the lowest live part provided that such a knockout after formation is pushed back essentially ush with the wall. The concentric knockout shall also be subjected to

47、 the Concentric Knockout Rain Test, Section 18. 4.6 An external operating mechanism, such as for a disconnect, mounted on or through the enclosure shall withstand the environmental tests specied in the Standard for Enclosures for Electrical Equipment, UL 50, for the enclosure type marked in accordan

48、ce with 27.4.1. 4.7 An enclosure not exceeding 185 square inches (1194 cm 2 ) frontal area may be formed of 0.060 inch (1.52 mm) thick aluminum, if the aluminum hardness is grade H14, and if a meter socket is provided, the distance from the edge of the meter opening does not exceed 5 inches (127 mm)

49、 to an unanged edge nor 10 inches (254 mm) to a anged edge. 4.8 The cover over a socket for an individual meter shall be secured to the assembly by at least two fastenings. A latch or overlapping ange shall be considered as a fastening. 4.9 If required for a specic need, such as to provide for latching, the overlap between the cover and box may be less than 1/2 inch (12.7 mm) but not less than 1/4 inch (6.4 mm). The length of the reduced overlap shall not exceed 1-1/2 inches (38.1 mm). 4.10 The