1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1238 Control Equipment for Use with Flammable Liquid Dispensing Devices STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION
2、FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Control Equipment for Use with Flammable Liquid Dispensing Devices, UL 1238 Sixth Edition, Dated July 10, 2015 Summary of Topics This revision of ANSI/UL 1238
3、is being issued to add laminated glass and glass with protective coatings for panels. The new and revised requirements are substantially in accordance with Proposal(s) on this subject dated July 22, 2016. Text that has been changed in any manner or impacted by ULs electronic publishing system is mar
4、ked with a vertical line in the margin. 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
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8、d while purchaser is storing an electronic Standard on the purchasers computer system. SEPTEMBER 7, 2016 UL 1238 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 7, 2016 UL 1238 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT
9、 AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL July 10, 2015 (Title Page Reprinted: September 7, 2016) 1 UL 1238 Standard for Control Equipment for Use with Flammable Liquid Dispensing Devices First Edition August, 1975 Second Edition March, 1996 Third Edition Septem
10、ber, 2001 Fourth Edition March, 2006 Fifth Edition May, 2008 Sixth Edition July 10, 2015 This ANSI/UL Standard for Safety consists of the Sixth Edition including revisions through September 7, 2016. The most recent designation of ANSI/UL 1238 as an American National Standard (ANSI) occurred on Septe
11、mber 7, 2016. ANSI approval for a standard does not include the Cover Page, Transmittal Pages and Title Page. 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 Standard
12、s 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 shall remain the sole and exclusive prope
13、rty of UL. COPYRIGHT 2016 UNDERWRITERS LABORATORIES INC. ANSI/UL 1238-2016UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JULY 10, 2015 UL 1238 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBU
14、TION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .6 2 General 7 2.1 Components 7 2.2 Units of measurement .7 2.3 Undated references .7 3 Glossary .8 4 Instructions 9 CONSTRUCTION 5 Frame and Enclosure 10 5.1 General .10 5.2 Covers .10 5.3 Cast metal 11 5.4 Sheet metal 12 5.5 Nonmetallic
15、 .12 5.6 Glass panels 15 5.7 Openings .15 5.8 Ventilating openings .16 5.9 Other openings .16 5.10 Wiring openings 18 5.11 Speaker openings 19 6 Raintight and Rainproof Enclosures 20 7 Operating Mechanism 21 8 Corrosion Protection .21 9 Protection of User and Service Personnel 22 10 Field Wiring Con
16、nections 22 10.1 Permanently connected devices .22 10.2 Terminal compartments .23 10.3 Wiring terminals and leads 23 10.4 Cord- and plug-connected devices .24 11 Internal Wiring 26 11.1 General .26 11.2 Wires .26 11.3 Splices and connections 27 11.4 Interconnecting cords and cables 27 12 Grounding .
17、28 13 Bonding of Internal Parts .29 13.1 General .29 13.2 Construction and connections 29 ELECTRICAL COMPONENTS 14 Switching Devices 30 15 Capacitors 31 16 Transformers .31 17 Motors .31 18 Heaters 32 JULY 10, 2015 UL 1238 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUT
18、ION WITHOUT PERMISSION FROM UL 19 Insulating Material .33 20 Insulating Barriers .35 21 Secondary Circuits 36 22 Separation of Circuits 37 23 Low-Voltage Class-2 Circuits .38 24 Limited Current Circuits 39 25 Barriers 39 26 Printed-Wiring Boards 39 SPACINGS 27 General 40 PERFORMANCE 28 General 43 28
19、.1 Test voltage .43 28.2 Additional tests 44 29 Input Measurement Test .44 30 Output Measurement Test 44 31 Maximum Voltage Output Measurement Test .45 32 Normal Temperature Test 45 33 Operation .48 34 Overload and Endurance Test 48 34.1 General .48 34.2 Overload 49 34.3 Endurance 49 35 Dielectric V
20、oltage-Withstand Test .49 36 Aging Test 50 37 Low-Voltage Class-2 Transformer Test .50 37.1 General .50 37.2 Open-circuit secondary voltage 51 37.3 Current output .51 37.4 Volt-ampere capacity .51 37.5 Burnout .52 37.6 Dielectric withstand .52 38 Limited Current Test 52 39 Nonmetallic Enclosures 53
21、39.1 General .53 39.2 Thermal aging conditioning 54 39.3 Flammability test .54 39.4 Elevated temperature test .55 39.5 Impact test 55 40 Snap-On Covers 56 40.1 General .56 40.2 Squeezing force test 56 40.3 Pull force test 56 40.4 Impact test of snap-on covers 56 41 Rain Test 57 42 Water Penetration
22、Test .60 43 Component Faults .60 44 Heater Maximum Temperature Test .60 JULY 10, 2015 UL 1238 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MANUFACTURING AND PRODUCTION LINE TESTS 45 General 61 45.1 Details 61 45.2 Production line dielect
23、ric voltage-withstand test 61 RATING 46 General 62 MARKING 47 General 62 APPENDIX A Standards for ComponentsA1 JULY 10, 2015 UL 1238 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover electrica
24、l equipment used for the control and monitoring of ammable liquid and LP-Gas dispensing devices rated 600 volts or less. Such control equipment is intended to be installed in ordinary locations in accordance with the National Electrical Code, NFPA 70. 1.2 These requirements also cover electrical con
25、trol equipment that is capable of being installed in or over a hazardous area as dened by the Flammable and Combustible Liquids Code, NFPA 30. Electrical control equipment for installation in a Class I, Division 1 or Division 2 hazardous area shall comply with the applicable requirements for the Haz
26、ardous Location protection method employed. See Appendix A for a list of appropriate standards. 1.3 These requirements cover general-use eld-installed equipment. They also cover controls intended to be factory installed on or in certain devices as operating controls. Typical devices covered by these
27、 requirements include: a) Communication Units Visual, pulse, or audio devices which complies with the transmittal of data or information. Such devices include audio or visual systems between the service station attendant and the customer, and data processing systems between the service station and a
28、 remote data processing terminal. b) Control Consoles Prepay, post-pay, remote totalizing, or remote actuating and monitoring devices located indoors or within a structure some distance from the dispensing device. c) Credit Acceptance Units Dollar bill, coin, token, pulse, or credit card activated d
29、evices which are capable of being installed on, adjacent to, or away from the dispensing device. d) Electric Computer Resets Electrically authorized or electrically operated devices which reset a mechanical computer. 1.4 These requirements do not cover safety or emergency controls which automaticall
30、y or manually interrupt the operation of a dispensing device. 1.5 The term device refers to any equipment covered by this standard. 1.6 These requirements do not cover purely mechanical systems such as hose nozzle attachments and pneumatic or hydraulic actuators. JULY 10, 2015 UL 1238 6UL COPYRIGHTE
31、D MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 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. 2.1.2 A component is not required to com
32、ply 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 rating established for t
33、he 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 used only under those
34、specic conditions. 2.1.5 Except for portable equipment, provision shall be made for securely mounting control equipment in position. Bolts, screws, or other parts used for mounting equipment shall be independent of those used for securing components of the equipment to the frame, base, or panel. 2.2
35、 Units of measurement 2.2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 2.2.2 Unless otherwise indicated, all voltage and current values mentioned in this standard are root-mean-square (rms). 2.3 Undated references 2.3.1 An
36、y 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. JULY 10, 2015 UL 1238 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL
37、 3 Glossary 3.1 For the purpose of this standard, the following terms apply. 3.2 ABBREVIATIONS For the purpose of this standard, the following denitions apply: AC Alternating Current AWG American Wire Gage DC Direct Current GSG Galvanized Sheet Gage Hz hertz MSG Manufacturers Standard Gage NEC Natio
38、nal Electrical Code, NFPA 70 psig Pounds per square inch gauge rms Root-mean-square 3.3 BRANCH CIRCUIT That portion of the building wiring system beyond the nal overcurrent device on the power-distribution panel protecting the circuit to the eld-wiring terminals in a permanently connected device or
39、to the receptacle outlet for cord-connected devices. 3.4 CIRCUITS, ELECTRICAL a) Class 2 (Low-Voltage) A circuit involving a potential of not more than 42.4 volts peak supplied by: 1) An energy-limiting Class 2 transformer; 2) A nonenergy-limiting Class 2 transformer and an overcurrent protective de
40、vice that has been evaluated for limiting energy to Class 2 levels; 3) The combination of an isolated transformer secondary winding and a xed impedance or reliable regulating network which complies with the applicable performance requirements for an energy-limiting Class 2 transformer; 4) A dry cell
41、 battery having output characteristics no greater than those of an energy- limiting Class 2 transformer; or JULY 10, 2015 UL 1238 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 5) The combination of a rechargeable battery and a xed impedan
42、ce or reliable regulating network which complies with the applicable performance requirements for an energy-limiting Class 2 transformer. b) Line-Voltage Any eld connected source of supply other than battery power, nominally 50 60 Hz, 115, 208, or 230 volts, is classied as a line-voltage circuit. c)
43、 Secondary Those circuits supplied from transformer output windings which are electrically isolated, i.e., insulated from ground. 3.5 CORD- AND PLUG-CONNECTED DEVICE A device intended for connection to the branch- circuit power line by means of a supply cord. Such a device is intended to be moved fo
44、r reasons of interchange or servicing. 3.6 GENERAL PURPOSE ENCLOSURE A metallic or nonmetallic enclosure that is not required to be explosion proof. 3.7 LIMITED CURRENT CIRCUIT A circuit which is so designed and protected that, under both normal conditions and a likely fault condition, the current w
45、hich can be drawn is not at levels that are considered hazardous. See Limited Current Test, Section 38, for limits. 4 Instructions 4.1 A copy of the operating and installation instructions intended to accompany each device, or equivalent information, is to be used as a reference in the examination a
46、nd test of the device. For this purpose, a printed edition is not required. 4.2 The instructions shall include such directions and information as deemed by the manufacturer to be adequate for the proper installation, maintenance, and use of the device. 4.3 For products marked in accordance with 47.1
47、(f)(4), the following statements shall be included in the installation instructions. a) A statement to the effect that the equipment is to be installed and used in accordance with the National Electrical Code, NFPA 70, and the Flammable and Combustible Liquids Code, NFPA 30. b) Detailed information
48、showing hook-up and/or ratings associated with each terminal, lead, or connector in the interconnection box or other device to which eld connections are to be made. c) Information necessary to determine that the junction box in the dispenser has sufficient volume for the application. See 20.13 and 2
49、0.14 and Table 20.2 in the Standard for Power- Operated Dispensing Devices for Petroleum Products, UL 87. d) Wiring diagrams showing typical dispenser-control system connections. JULY 10, 2015 UL 1238 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONSTRUCTION 5 Frame and Enclosure 5.1 General 5.1.1 Control equipment shall be so fabricated and assembled that it has the strength and rigidity required to
