1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 231 Power OutletsUL 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 Power Outlets, UL 231 Ninth Edition, Dated August 6, 2008 SUMMARY OF TOPICS This revision of ANSI/UL 231 is being issued to reect the reaffirmation of the ANSI approval of the standard. No technical changes have been made to the docu
3、ment. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. The revisions are substantially in accordance with Proposal(s) on this subject dated July 11, 2014. All rights reserved. No part of this publication may be rep
4、roduced, 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 of any kind, either expressed or implied, including but not limited to, the im
5、plied 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 any other damages arising out of the use of or the inability to use this Standa
6、rd, 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 the claim. Users of the electronic versions of ULs Standards for Safety agree t
7、o 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 storing an electronic Standard on the purchasers computer system. The requirem
8、ents in this Standard are now in effect, except for those paragraphs, sections, tables, gures, and/or other elements of the Standard having future effective dates as indicated in the note following the affected item. The prior text for requirements that have been revised and that have a future effec
9、tive date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. SEPTEMBER 11, 2014 UL 231 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 11, 2014 UL 231 tr2 No Text on This PageUL COPYRIGHTED MAT
10、ERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL AUGUST 6, 2008 (Title Page Reprinted: September 11, 2014) 1 UL 231 Standard for Power Outlets First Edition February, 1967 Second Edition June, 1970 Third Edition November, 1972 Fourth Edition May, 1977 Fifth Ed
11、ition September, 1982 Sixth Edition September, 1988 Seventh Edition May, 1994 Eighth Edition June, 1998 Ninth Edition August 6, 2008 This ANSI/UL Standard for Safety consists of the Ninth Edition including revisions through September 11, 2014. The most recent designation of ANSI/UL 231 as a Reaffirm
12、ed American National Standard (ANS) occurred on September 11, 2014. ANSI approval for a 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. Proposal
13、s 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. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownershi
14、ps, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2014 UNDERWRITERS LABORATORIES INC. ANSI/UL 231-2010 (R2014)UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL AUGUST 6, 2008 POWER OUTLETS -
15、 UL 231 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .6 2 General 7 2.1 Components .7 2.2 Units of measurement .8 2.3 Undated references .9 3 Glossary .9 CONSTRUCTION 4 General 9 5 Enclo
16、sure .11 5.1 General 11 5.2 Enclosure of switches and circuit breakers .15 5.3 Enclosure of fuses .16 5.4 Opening for cord 17 5.5 Nonmetallic enclosures .17 5.6 Dead front 18 5.7 Doors and covers .19 5.8 Meter socket base .20 5.9 Ventilation openings .21 6 Connections for Wiring Systems .23 7 Mounti
17、ng Posts and Pedestals 24 7.1 General 24 7.2 Cover 25 7.3 Electrical connections 25 7.4 Wire opening .25 7.5 Bonding 25 7.6 Overlap 25 7.7 Instructions .26 7.8 Pedestal .26 8 Wiring Devices 26 8.1 General 26 8.2 Receptacles 26 8.3 Operating mechanism 28 8.4 Switches .31 8.5 Ground-fault circuit prot
18、ection for personnel 31 9 Insulating Material .32 10 Current-Carrying Parts 33 10.1 General .33 10.2 Terminals .38 10.3 Spring washers 40 11 Service Equipment Use 41 11.1 General .41 11.2 Mobile home service equipment 41 12 Disconnecting Means .42 13 Alternate Source Switching Means 43 14 Overcurren
19、t Protection 43 15 Spacings 44 AUGUST 6, 2008 POWER OUTLETS - UL 231 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 15.1 General .44 15.2 Insulating barriers 47 16 Wiring Space .50 16.1 General .50 16.2 Wire-bending space 51 16.3 Barriers
20、.54 16.4 Bushings 55 17 Grounding and Bonding .55 17.1 Ground bus 55 17.2 Terminal for neutral service conductor 56 17.3 Grounding electrode conductor terminal .57 17.4 Main bonding jumper .57 17.5 Grounding electrode conductor and main bonding jumper when sub-feed terminals are provided 57 17.6 Equ
21、ipment grounding terminal for 100-ampere rated mobile home .58 17.7 Receptacle grounding .59 17.8 Bonding .59 17.9 Bonding means for metallic conduit .60 17.10 Grounding and bonding connections .61 18 Luminaires .61 PERFORMANCE 19 Bonding Resistance and Conductor Tests .62 19.1 Plug-in grounding mea
22、ns 62 19.2 Reduced size bonding conductor .63 19.3 Bonding connection 64 20 Strength Test of Insulating Base and Support 64 21 External Operating Mechanism Test 64 22 Rain and Splash Test .65 22.1 General .65 22.2 Test description 65 23 Spray Test .66 24 Dielectric Test of Clamped Joint 66 25 Dielec
23、tric Voltage-Withstand Test .69 26 Short-Circuit Current Test 69 26.1 General .69 26.2 Testing of receptacles 69 26.3 Short circuit procedure 69 26.4 Evaluation of test results 70 27 Conduit Connection Tests .71 27.1 General .71 27.2 Pullout 71 27.3 Torque 71 27.4 Bending .71 27.5 Knockouts .72 28 S
24、hort Time Fault Current Test 72 29 Torque Deformation Test 73 30 Beam Loading Deection Test .75 AUGUST 6, 2008 POWER OUTLETS - UL 231 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL RATINGS 31 General 75 32 Current 76 33 Short Circuit Curre
25、nt 76 34 Voltage 77 MARKINGS 35 Details .78 36 Permanence of Marking .90 INSTALLATION INSTRUCTIONS 37 Mounting in Concrete .90 38 Mounting of Marina Type Equipment 90 APPENDIX A Standards for ComponentsA1 AUGUST 6, 2008 POWER OUTLETS - UL 231 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRO
26、DUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover power outlets, with or without integral mounting posts or pedestals, and power outlet ttings for use in accordance with the National Electrical Code, NFPA 70. 1.2 A power outlet covered by these requ
27、irements, although not restricted to such use, is intended for use: a) At outdoor locations such as on farms, at building sites, and the like, where power is required to operate portable, mobile, or temporarily installed equipment, b) To supply power to a mobile home or a recreational vehicle, and c
28、) To supply shore power to boats. 1.3 A power outlet may contain: a) Attachment plug receptacles, b) Circuit breakers, c) Fuseholders, d) Fused switches and facilities for watt-hour meters, and e) Provisions for eld installed circuit breakers or switches and fuses. 1.4 Power outlet ttings covered by
29、 these requirements are intended for factory or eld assembly into or in conjunction with power outlets designed for such assembly. Fittings may be panels or combination units incorporating receptacles, disconnecting means, overcurrent protection or other devices that have been determined to be equiv
30、alent. A separable mounting post or pedestal to which power outlets are to be mounted is also a tting. 1.5 In addition to or instead of mounting to a post or pedestal tting as mentioned in 1.4, a power outlet may be constructed for mounting on and connection to a mounting post or pedestal also desig
31、ned to be used with other types of distribution equipment. 1.6 Some power outlets may have special features and markings to indicate their acceptability for use as service equipment. 1.7 A power outlet with a mounting post is intended for mounting in concrete. A power outlet with a mounting pedestal
32、 is intended for mounting on a concrete slab. Unless marked otherwise, a mounting post or pedestal tting is not intended to serve as the sole support of a mast for overhead wiring. AUGUST 6, 2008 POWER OUTLETS - UL 231 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION
33、WITHOUT PERMISSION FROM UL 1.8 A product that contains features, characteristics, components, materials, or systems new or different from those covered by the requirements in this Standard, and that involves a risk of re, electric shock, or injury to persons shall be evaluated using the appropriate
34、additional component and end-product requirements to determine that the level of safety as originally anticipated by the intent of this Standard is maintained. A product whose features, characteristics, components, materials, or systems conict with specic requirements or provisions of this Standard
35、shall not be judged to comply with this Standard. Where appropriate, revision of requirements shall be proposed and adopted in conformance with the methods employed for development, revision, and implementation of this Standard. 2 General 2.1 Components 2.1.1 Except as indicated in 2.1.2, a componen
36、t 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 that: a) Involves a
37、 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. 2.1.4 Specic compo
38、nents 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. 2.1.5 A component not marked w
39、ith a short-circuit current rating is considered rated for use in a circuit having a maximum available fault current as shown in Table 2.1. 2.1.6 The short-circuit current available in the secondary circuit of a transformer rated 10 kVA or less is considered to be 5000 amperes or less. 2.1.7 The sho
40、rt-circuit current available on the load side of a 15 ampere current-limiting circuit breaker or Class CC, G, J, RK1, RK5, or T fuse is considered to be 5000 amperes. In a single phase 120-volt circuit, the short-circuit current available on the load side of a 20 ampere circuit breaker or Class CC,
41、G, J, RK1, RK5, or T fuse is considered to be 10,000 amperes or less. 2.1.8 For a power outlet having a short circuit rating exceeding 5000 amperes rms symmetrical, a luminaire as covered in item 4 of Table 2.1 shall be located in the secondary circuit of a maximum 10 kVA transformer as specied in 2
42、.1.6 or on the load side of a 15 ampere current-limiting circuit breaker or fuse as specied in 2.1.7 that is provided in the power outlet or power outlet tting. Exception: The transformer, circuit breaker, or fuse may be remotely located if the power outlet or power outlet tting is marked as specied
43、 in 35.73. AUGUST 6, 2008 POWER OUTLETS - UL 231 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2.2 Units of measurement 2.2.1 If a value for measurement is followed by a value in other units in parentheses, the second value may be only ap
44、proximate. The rst stated value is the requirement. Table 2.1 Assumed maximum short-circuit current rating for unmarked components Component Short-circuit current rating, kA 1. Circuit breaker (including GFCI type) 5 2. Clock-operated switch 5 3. Fuseholder 10 4. Lighting xture (circuit) internal 5
45、5. Miniature fuse 10 a 6. Plug fuse 10 7. Industrial control equipment: a. Auxiliary device 5 b. Motor controllers or switches (other than mercury tube type) 5 c. Mercury tube switches: Rated over 60 amperes or over 250 volts 5 Rated 250 volts or less, 60 amperes or less, and over 2 kVA 3.5 b Rated
46、250 volts or less and 2 kVA or less 1 b 8. Meter socket base 10 9. Photoelectric switches 5 10. Receptacle (GFCI type) 2 c 11. Receptacle (other than GFCI type) 10 12. Snap switch 5 13. Terminal block 10 14. Thermostat 5 a The use of these fuses is limited to 125-volt circuits as specied in the Exce
47、ption to 14.5. b This rating is below the minimum specied in Table 33.1 and the component shall either: 1) Be investigated for the minimum short-circuit current rating specied in Table 33.1 or 2) Be located on the load-side of a suitable current-limiting overcurrent protective device. c A GFCI type
48、receptacle is restricted for use in power outlets rated no more than 20 amperes (See 32.1(d) unless: 1) The power outlet and GFCI type receptacle comply with the short-circuit current test specied in the Short-Circuit Current Test, Section 26 or 2) The receptacle is located in the 120-volt secondary
49、 circuit of a transformer rated 5 kVA or less (a circuit considered to have a short-circuit current available of 2 kA or less) and is provided with suitable overcurrent protection. 2.2.2 Unless otherwise indicated, all voltage and current values mentioned in this standard are root-mean-square (rms). AUGUST 6, 2008 POWER OUTLETS - UL 231 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2.3 Undated references 2.3.1 Any undated referen
