1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1203 Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classied) LocationsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WIT
2、HOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classied) Locations, UL 1203 Fifth Edition, Dated November 2
3、2, 2013 Summary of Topics This revision to ANSI/UL 1203 is being issued to include the following changes in requirements: Revisions to 10.2.1 and Section 34 Revisions to 15.1 and Section 24 to align UL 1203 with the current ferrous metal electrical enclosure corrosion protection requirements in UL 5
4、0E 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 requirements 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
5、 which the changed requirement becomes effective. The new and revised requirements are substantially in accordance with Proposal(s) on this subject dated June 26, 2015 and September 4, 2015. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmit
6、ted 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 implied warranties of merchantability or tness for a
7、ny 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 Standard, even if UL or an authorized UL representative
8、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 to defend, indemnify, and hold UL harmless from and
9、 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. OCTOBER 16, 2015 UL 1203 tr1UL COPYRIGHTED MATERIAL NOT AUTHOR
10、IZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 16, 2015 UL 1203 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL NOVEMBER 22, 2013 (Title Page Reprinted: October 16, 2015) 1 UL 1203 St
11、andard for Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classied) Locations First Edition January, 1987 Second Edition July, 1994 Third Edition September, 2000 Fourth Edition September, 2006 Fifth Edition November 22, 2013 This ANSI/UL Standard for Safety consis
12、ts of the Fifth edition including revisions through October 16, 2015. The most recent designation of ANSI/UL 1203 as an American National Standard (ANSI) occurred on October 16, 2015. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, or effective date infor
13、mation. 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. Neither a print
14、ed 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 2015 UNDERWRITERS LABORATORIES INC. ANSI/UL 1203-2015UL COPYRIGHTED MATERIAL NOT
15、AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL NOVEMBER 22, 2013 UL 1203 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .10 2 Components 10 3 Units of Measu
16、rement 11 4 Undated References .11 5 Enclosure Types 11 6 Class I, Zone and Group Equivalency .11 6.1 Class I, Zone 1, Group IIA 11 6.2 Class I, Zone 1, Group IIB 11 6.3 Class I, Zone 1, Group IIC 12 6.4 Zone 20 and Zone 21 12 7 Glossary 12 PART I EXPLOSION-PROOF EQUIPMENT CONSTRUCTION 8 Enclosure M
17、aterial 13 9 Enclosure Thickness .13 10 Joints in Enclosures 14A 10.1 General .14A 10.2 Cemented joints 14A 10.3 Joints with amepaths Class I, Groups A, B, C, and D 16 10.4 Class I, Groups C and D locations .17 10.5 Class I, Group B locations 23 10.6 Threaded Joints 24 11 Shaft Openings 26 11.1 Gene
18、ral .26 11.2 Non-rotating shafts and shafts rotating at a speed of less than 100 rpm 27 11.3 Shafts rotating at a speed of 100 rpm or more .27 12 Holes in Enclosures .30 13 Drain and Breather Fittings in Enclosures 31 14 Supply Connections .31 14.1 Fixed equipment conduit and cable entries 31 14.2 C
19、ord-connected portable equipment 38 15 Protection Against Corrosion .41 16 Materials Applied to Joint Surfaces .42 17 Devices Having Coated Threaded Joint Surfaces .43 18 Porosity in Enclosure Materials .43 19 Polymeric Enclosures .43 PERFORMANCE 20 Temperature Test .44 21 Explosion Tests 45 22 Hydr
20、ostatic Pressure Test .50 23 Leakage Test on Factory-Installed Conduit Seals 51 24 Rust-Resistance Test .51 NOVEMBER 22, 2013 UL 1203 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 25 Tests for Glass Parts .52 25.1 Thermal-shock test .52 2
21、5.2 Impact test 52 26 Secureness Test on Supply Connection Hubs .52 27 Tests on Joint Gaskets .53 28 Electrical-Resistance Test .53 28.1 Grounding-continuity of cord-connected equipment .53 28.2 Equipment having coated threaded joint surfaces or conduit openings 53 29 Accelerated Aging Test on Bushi
22、ngs .54 30 Strain-Relief Test 54 31 Rough-Usage Test .55 32 Drop Test 55 33 Non-Metallic Enclosure Materials Tests .55 33.1 General .55 33.2 Chemical compatibility by material samples 56 33.3 Chemical compatibility by complete end product tests 57 33.4 Test for accumulation of static electricity 59
23、34 Chemical Resistance Tests on Sealing and Cementing Compounds 60 PART II DUST-IGNITION-PROOF EQUIPMENT CONSTRUCTION 35 Enclosure 61 35.1 General .61 35.2 Material .61 35.3 Thickness .62 36 Joints in Enclosures .62 37 Shaft Openings .63 38 Holes in Enclosures .65 39 Drain and Breather Fittings in E
24、nclosures 65 40 Supply Connections .66 40.1 Fixed equipment .66 40.2 Cord-connected portable equipment 68 41 Protection Against Corrosion .68 41.1 General .68 41.2 Physical properties .69 41.3 Accelerated air-oven aging test 69 41.4 Compression set .70 41.5 Identication .72 42 Materials Applied to J
25、oint Surfaces .73 PERFORMANCE 43 Dust-Penetration Test .73 44 Temperature Test with Dust Blanket 75 45 Polymeric Enclosure Tests .76 46 Leakage Test on Factory-Installed Conduit Seals .76 47 Rust-Resistance Test .76 48 Tests for Glass Parts 76 49 Secureness Test on Conduit Hubs 76 OCTOBER 16, 2015 U
26、L 1203 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 50 Tests on Joint Gaskets 77 OCTOBER 16, 2015 UL 1203 4AUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 16, 2015 UL 12
27、03 4B No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 51 Electrical-Resistance Test 77 52 Accelerated-Aging Test on Bushings .77 53 Strain-Relief Test 77 54 Rough-Usage Test 77 55 Drop Test 77 56 Diaphragm Endurance Test
28、.77 57 Test for Secureness of Conduit Hubs 78 57.1 General .78 57.2 Pullout 78 57.3 Bending .78 PART III MANUFACTURING AND PRODUCTION TESTS 58 Bonding Test on Cord-Connected Equipment 80 59 Hydrostatic Pressure Test 80 PART IV MARKINGS 60 Details .80 PART V INDUSTRIAL CONTROL EQUIPMENT 61 General 84
29、 CONSTRUCTION 62 Holes in Enclosures .85 PERFORMANCE 63 No-Load Endurance Test 85 MARKINGS 64 Details .86 PART VI SWITCHES 65 General 86 CONSTRUCTION 66 Enclosure Thickness 87 67 Mounting of Switch Mechanism .87 68 Spacings .87 69 Insulating Barrier or Liner .88 NOVEMBER 22, 2013 UL 1203 5UL COPYRIG
30、HTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL RATINGS 70 General 88 MARKING 71 Details .89 PART VII CIRCUIT BREAKERS 72 General 90 CONSTRUCTION 73 General .91 74 Wiring Space .91 MARKINGS 75 Details .96 PART VIII OUTLET BOXES AND FITTINGS 76 General
31、 98 77 Material Thickness .99 78 Supply Connections for Class I Locations 99 79 Supply Connections for Class II Locations .100 80 Fitting for Mineral Insulated Cable 100 81 Conduit Fittings for Sealing 100 82 Flexible Fittings 101 83 Mineral Insulated Cable Fittings 101 84 Cord Connectors for Mobile
32、 or Portable Equipment 101 84.1 General .101 84.2 Terminal enclosure 101 84.3 Insulating bases 102 84.4 Live parts 103 84.5 Grounding 103 84.6 Terminals 104 84.7 Leads 105 84.8 Spacings .106 84.9 Insulating barrier or liner .106 84.10 Seal 107 84.11 Packing gland .107 84.12 Cord clamp 108 84.13 Secu
33、rement of threaded engagements .108 84.14 External metal parts 108 NOVEMBER 22, 2013 UL 1203 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL PERFORMANCE 85 Explosion Test 109 86 Hydrostatic Pressure Test .111 87 Dust Penetration Test .112 8
34、8 Leakage of Sealing Fittings Test .112 89 High Humidity Tests 113 90 Leakage of Mineral Insulated Cable Fittings Test .113 91 Electrical Resistance Test .114 91.1 Flexible ttings .114 91.2 Boxes or ttings having coated threaded joint surfaces 114 92 Arcing Test .114 93 Bending Test 115 94 Vibration
35、 Test 116 95 Endurance Load at Elevated Temperature Test 116 96 Tension Test .117 97 Moist Ammonia-Air Stress Cracking Test 117 98 Accelerated Aging of Bushing Test .118 99 Cord Pull Test .118 100 Solvent and Water Condensate Exposure Test .119 101 Secureness of Conduit Hubs Test 119 102 Markings 12
36、0 PART IX RECEPTACLE-PLUG COMBINATIONS INTRODUCTION 103 General .123 CONSTRUCTION 104 General .124 105 Material .124 106 Live Parts .124 107 Grounding .124 108 Supply Connection .125 108.1 Receptacle 125 108.2 Plug 125 108.3 Plug and receptacle 125 109 Receptacle Employing Interlocking Switch or Cir
37、cuit Breaker .128 110 Contact and Blade Exposure 128 111 Spacings 131 112 Assembly .132 PLUG 113 General .133 114 Enclosure .133 115 Strain Relief .134 116 Bushings 134 117 Enclosure Material 134 118 Seal Between Electrical Enclosure and Receptacle Contacts 134 NOVEMBER 22, 2013 UL 1203 7UL COPYRIGH
38、TED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 119 Bonding .135 PLUG AND RECEPTACLE FOR FLAMMABLE ANESTHETIZING LOCATIONS 120 General .135 PERFORMANCE 121 General .138 122 Overload Test .138 123 Normal Temperature Test .140 124 Strain-Relief Test 142
39、125 No-Load Endurance Test .142 126 Full-Load Endurance Test .143 127 Test for Arc-Sustaining in the Presence of Explosive Atmospheres .143 128 Overload Test in the Presence of Explosive Atmospheres .144 129 Test for Arcing in the Presence of Grain Dust-Air Atmospheres 145 130 Watertightness Test 14
40、5 MARKINGS 131 Details 145 PART X ELECTRICALLY OPERATED VALVES 132 General .146 CONSTRUCTION 133 Enclosure Thickness 147 PERFORMANCE 134 General .147 135 Temperature Test 149 136 Burnout Test 150 MARKINGS 137 General .151 138 Installation Instructions 152 PART XI TESTS ON POLYMERIC VALVE ENCLOSURES
41、139 General .152 140 Explosion Tests 152 141 Hydrostatic Pressure Test .152 142 Conduit Connection Tests .153 143 Impact Tests 154 144 Thermal Cycling Test .154 145 Thermal Shock Test 154 NOVEMBER 22, 2013 UL 1203 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHO
42、UT PERMISSION FROM UL TESTS ON ENCLOSURES FOR CLASS II VALVES 146 General .155 147 Test for Accumulation of Static Electricity 155 148 Dust-Penetration Test .155 149 Connection Tests .156 150 Impact Tests .156 151 Thermal Cycling Test .157 152 Thermal Shock Test 157 SUPPLEMENT SA - ALTERNATE JOINTS
43、IN ENCLOSURES SA1 General SA1 SA2 Cemented Joints SA1 SA3 Joints with Flamepaths Class I, Groups A, B, C, and D SA2 SA4 Labyrinth Joints Groups A, B, C, and D SA3 SA5 Threaded Joints SA3 SA5.1 General Class I, Groups A, B, C, and D SA3 SA5.2 Class I, Groups A and B SA3 SA5.3 Class I, Groups C, and D
44、 .SA4 SA6 Joints with Flamepaths: Class I, Groups A, B, C, and D .SA5 SUPPLEMENT SB - ALTERNATIVE EXPLOSION TESTS SB1 Explosion Tests .SB1 APRIL 24, 2015 UL 1203 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These
45、 requirements cover explosion-proof and dust-ignition-proof electrical equipment for installation and use in hazardous (classied) locations, Class I, Division 1, Groups A, B, C, and D, and Class II, Division 1, Groups E, F, and G, in accordance with the National Electrical Code, NFPA 70. 1.2 These r
46、equirements also cover explosion-proof electrical equipment for installation and use in Class I, Zone 1, Groups IIA, IIB, and IIC hazardous (classied) locations and dust-ignition-proof equipment for use in Zone 20, 21, and 22 locations. 1.3 These requirements also cover explosion-proof electrical eq
47、uipment that has been investigated for use in one or more specic gas or vapor atmospheres with or without additional Class I Groups. See 60.6. 1.4 These requirements do not cover equipment for use in hazardous (classied) locations specically covered in a separate standard. 1.5 These requirements do
48、not cover electrostatic devices, circuits or systems; refrigeration system controllers or the internal construction of electrical instruments such as meters. 1.6 These requirements cover equipment for use under the following atmospheric conditions: a) A minimum ambient temperature of minus 50C (minu
49、s 58F); b) An oxygen concentration not greater than 21 percent by volume; and c) A nominal barometric pressure of one atmosphere. 1.7 Equipment covered by this standard shall also comply with the applicable requirements for similar equipment for use in ordinary unclassied locations. 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. 2.2 A component is not required to comply with a speci
