1、UL 122ISBN 0-7629-0276-0Photographic EquipmentUnderwriters Laboratories Inc. (UL)333 Pfingsten RoadNorthbrook, IL 60062-2096UL Standard for Safety for Photographic Equipment, UL 122Fourth Edition, Dated April 9, 1999Revisions: This Standard contains revisions through and including July 11, 2001.UL S
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20、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that have been revised and that have a future effective dateare located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice.New product submittals made prior to a s
21、pecified future effective date will be judged under all of therequirements in this Standard including those requirements with a specified future effective date, unlessthe applicant specifically requests that the product be judged under the current requirements. However, ifthe applicant elects this o
22、ption, it should be noted that compliance with all the requirements in thisStandard will be required as a condition of continued Listing, Recognition, and Follow-Up Services afterthe effective date, and understanding of this should be signified in writing.Copyright 2001 Underwriters Laboratories Inc
23、.JULY 11, 2001 UL 122tr2This Standard consists of pages dated as shown in the following checklist:Page Date1-5.July 11, 20016 .April 9, 19997-8B.July 11, 20019-43.April 9, 199944-44B .July 11, 200145-49 .April 9, 199950-50B .July 11, 200151-52 .April 9, 199953.July 11, 200154 .April 9, 199955-56.Jul
24、y 11, 200157-60 .April 9, 199961-62.July 11, 200163-93 .April 9, 199994-94B .July 11, 200195-98 .April 9, 1999SA1-SA3.July 11, 2001SA4-SA6 .April 9, 1999SA7.July 11, 2001SA8.April 9, 1999A1-A2 .April 9, 1999CRG1 .April 9, 1999CRG2 .July 11, 2001CRG3-CRG10.April 9, 1999SR1-SR6 .April 9, 1999JULY 11,
25、2001 UL 122 tr3JULY 11, 2001 UL 122tr4No Text on This PageAPRIL 9, 1999(Title Page Reprinted: July 11, 2001)1UL 122Standard for Photographic EquipmentFirst Edition February, 1974Second Edition August, 1984Third Edition June, 1993Fourth EditionApril 9, 1999An effective date included as a note immedia
26、tely following certain requirementsis one established by Underwriters Laboratories Inc.Revisions of this Standard will be made by issuing revised or additional pagesbearing their date of issue. A UL Standard is current only if it incorporates themost recently adopted revisions, all of which are item
27、ized on the transmittal noticethat accompanies the latest set of revised requirements.ISBN 0-7629-0276-0COPYRIGHT 1974, 2001 UNDERWRITERS LABORATORIES INC.JULY 11, 2001PHOTOGRAPHIC EQUIPMENT - UL 1222No Text on This PageCONTENTSFOREWORD .6INTRODUCTION1 Scope .72 General .82.1 Components .82.2 Units
28、of measurement .82.3 Undated references .83 Terminology .8A4 Glossary .8ACONSTRUCTION5 Moisture Condensation .106 Frame and Enclosure .106.1 General .106.2 Remotely- and automatically-controlled appliances .116.3 Enclosure material .127 Accessibility of Live Parts .147.1 Openings .147.2 Pin terminal
29、s .198 Mechanical Assembly .199 Protection Against Corrosion .2010 Power Supply Connections .2010.1 Cord-connected appliances .2010.2 Permanently-connected appliances .2511 Current-Carrying Parts .2712 Internal Wiring .2712.1 Mechanical protection .2712.2 Types of wire .2812.3 Splices and connection
30、s .2813 Grounding and Bonding .2913.1 Grounding .2913.2 Bonding .3114 Interconnecting Cords and Cables .3215 Receptacles and Connectors .3316 Separation of Circuits .3417 Insulating Material .3417.1 Electrical insulation .3417.2 Thermal insulation .3518 Overcurrent Protection .3518.1 General .3518.2
31、 Motors .3618.3 Lampholders and receptacles .3718.4 Primary circuits .3718.5 Secondary circuits .3719 Short-Circuit and Ground-Fault Protection .3820 Motors .3921 Switching Devices .39JULY 11, 2001 PHOTOGRAPHIC EQUIPMENT - UL 122 321.1 General .3921.2 Rating .3922 Lampholders .4023 Medium- and High-Pressure Lamps .4124 Capacitors .4124.1 Motor and power-factor capacitors .4124.2 Isolating capacitors .4224.3 Interference elimination capacitors .4224.4 Capacitor discharge .4224.5 Capacitor rating .4325 Transformers .4326 Heating Elements .4327 Printed-Wiring Boards .
