1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 875 Electric Dry-Bath HeatersUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPR
2、ODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Electric Dry-Bath Heaters, UL 875 Ninth Edition, Dated May 21, 2009 Summary of Topics This revision to ANSI/UL 875 is being issued to remove the reference to the withdrawal date of UL 873 and to address universal upkeep o
3、f UL Standards for Safety. These revisions are considered to be non-substantive and not subject to ULs STP process. 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 vertica
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10、UIREMENTS notice. DECEMBER 17, 2013 UL 875 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 17, 2013 UL 875 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION
11、 FROM UL MAY 21, 2009 (Title Page Reprinted: December 17, 2013) 1 UL 875 Standard for Electric Dry-Bath Heaters Prior to the rst edition, the requirements for the products covered by this standard were included in the Standard for Electric Heating Appliances, UL 499. The First through Third editions
12、 were titled Electric Dry Bath Heaters. The Fourth Edition was titled Electric Sauna Heating Equipment. First Edition August, 1970 Second Edition February, 1972 Third Edition June, 1976 Fourth Edition February, 1983 Fifth Edition August, 1989 Sixth Edition August, 1994 Seventh Edition September, 200
13、0 Eighth Edition March, 2004 Ninth Edition May 21, 2009 This ANSI/UL Standard for Safety consists of the Ninth Edition including revisions through December 17, 2013. The most recent designation of ANSI/UL 875 as an American National Standard (ANSI) occurred on November 16, 2011. ANSI approval for a
14、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. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Deve
15、lopment 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 property of
16、 UL. COPYRIGHT 2013 UNDERWRITERS LABORATORIES INC. ANSI/UL 875-2011UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL NOVEMBER 16, 2011 ELECTRIC DRY-BATH HEATERS - UL 875 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER
17、REPRODUCTION OR DISTRIBUTION 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 CONSTRUCTION 3A Component Specications .8A 4 Frame and Enclosure 8B 5 Risk of Injury to Persons 16A 6 Assembly 16
18、B 7 Corrosion Resistance .17 8 Supply Connections 17 8.1 General 17 8.2 Field-wiring compartment .18 8.3 Wire-bending space .20 8.4 Field-wiring terminals and leads .21 9 Current-Carrying Parts 23 10 Internal Wiring 23 10.1 General .23 10.2 Sleeving and tubing 24 10.3 Protection of wiring .24 10.4 S
19、plices and connections .24A 10.5 Separation of circuits .25 10.6 Barrier material and thickness .27 10.7 Low-voltage circuits .27 10.8 Line-voltage circuits 28 11 Heating Elements .28 11.1 General .28 11.2 Sheathed heating element .28 11.3 Guarding of heating elements 28 12 Electrical Insulation .29
20、 13 Thermal Insulation .30A 14 Motors .30A 15 Overcurrent Protection .30B 16 Motor-Running Overcurrent Protection .30B 16A Ground-Fault, Arc-Fault, and Leakage Current Detectors / Interrupters .30C 16B Fuses and Circuit Breakers .30C 17 Short-Circuit Protection 30D 17A Light Sources and Associated C
21、omponents .31 18 Lampholders .32 19 Switches .32 20 Receptacles 34 20A Printed Wiring Boards 34 20B Semiconductors and Small Electronic Components 34 21 Automatic Temperature Controls 34A NOVEMBER 16, 2011 ELECTRIC DRY-BATH HEATERS - UL 875 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODU
22、CTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 21.1 General 34A 21.2 Terminals and actuating members of temperature controls 36 21A Liquid Level Controls 36 21B Pressure Controls .36 22 Spacings 36 22.1 General .36 22.2 Barriers .38 23 Grounding and Bonding .39 PERFORMANCE 24 Power Input Test .40
23、25 Temperature Test .40 26 Minimum Room Air Temperature Test .48 27 Insulation Resistance Test .48 28 Dielectric Voltage-Withstand Test .48 29 Water Spray Test .49 30 Abnormal Operation Test 52 30.1 Temperature .52 30.2 Mechanical abuse 52 30.3 Cheesecloth and towel drape 54 30.4 Thermal cutoff 54A
24、30.5 Stalled fan .54A 30.6 Component breakdown 54A 31 Motor Switch Overload Test 54B 32 Stability Test 54B 33 Static Loading Test 54B 34 Strength of Legs Test .57 MANUFACTURING AND PRODUCTION-LINE TESTS 35 Dielectric Voltage-Withstand Test .57 36 Grounding-Continuity Test .58 RATINGS 37 Details .59
25、MARKINGS 38 Details .59 39 Permanence of Markings 65 INSTALLATION INSTRUCTIONS 40 Details .66 STATIONARY OR PORTABLE COMBINATION ROOM b) A combination of a heater unit and a prefabricated, factory-built room in which the assembled combination may be specied for eld installation, or that may be suppl
26、ied with a power-supply cord and intended to be fastened in place or located in a dedicated space. The room may be arranged so that it can be taken apart for shipment; or c) A combination of a heater and a cabinet that is constructed to enclose all but the users head. The unit is provided with a pow
27、er supply cord and is intended to be fastened in place or located in a dedicated space. 1.2 These requirements do not cover steam-bath heaters, or cable-type radiant-heating equipment, nor any other electric heating equipment or appliances that are covered in separate, individual requirements. 1.3 T
28、hroughout these requirements, the term heater is used broadly to refer to any heater unit, including its associated control assembly. 1.4 A heater shall employ materials and components throughout that are intended for the particular use and shall be made and nished with the degree of uniformity and
29、grade of workmanship practicable in a well-equipped factory. 1.5 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 or of electric shock or injury to persons sha
30、ll be evaluated using appropriate additional component and end-product requirements to maintain the level of safety as originally anticipated by the intent of this standard. A product whose features, characteristics, components, materials, or systems conict with specic requirements or provisions of
31、this standard does not comply with this standard. Revision of requirements shall be proposed and adopted in conformance with the methods employed for development, revision, and implementation of this standard. MAY 21, 2009 ELECTRIC DRY-BATH HEATERS - UL 875 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FO
32、R FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2 General 2.1 Components Section 2.1 revised and relocated as Section 3A.1 November 16, 2011 2.2 Units of measurement 2.2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate in
33、formation. 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 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest e
34、dition of that code or standard. NOVEMBER 16, 2011 ELECTRIC DRY-BATH HEATERS - UL 875 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3 Glossary 3 added May 21, 2009 3.1 For the purpose of this standard the following denitions apply. 3.2 CO
35、NTROL, AUTOMATIC ACTION A device in which the transmission and operation of at least one function are produced by initiation which is not the result of manual actuation. 3.3 CONTROL, LIMIT A protective control, see 3.6 3.4 CONTROL, MANUAL A device that requires direct human interaction to activate o
36、r rest the control. 3.5 CONTROL, OPERATING A device where the operation of which starts or regulates the appliance during normal operation. A regulating control is an operating control. 3.6 CONTROL, PROTECTIVE A device where the operation of which is intended to prevent the risk of electric shock, r
37、e, or injury (including thermal burns and hypothermia) to persons during abnormal operation of the appliance. A limit thermostat is a protective control. 3.7 CONTROL, REGULATING An operating control, see 3.5 3.8 CONTROL, SINGLE OPERATION DEVICE A Type 1.H manual control, see 3.4 and 3.10. 3.9 CONTRO
38、L, TYPE 1.D ACTION The actuation of a manual control designed so that disconnection can neither be prevented nor inhibited, by any reset mechanism and so that after disconnection, it is not possible to re-close the circuit even momentarily while the excess or fault condition persists. 3.10 CONTROL,
39、TYPE 1.H ACTION The actuation of a manual control that shall be so designed that the contacts cannot be prevented from opening and which may automatically reset to the closed position if the reset means is held in the reset position. The control shall not reset automatically at any temperature above
40、 -35C (-31F) with the reset mechanism in the normal position. 3.11 CONTROL, TYPE 2 ACTION The actuation of an automatic action control for which the manufacturing deviation and the drift of its operating value, operating time, or operating sequence have been declared and tested under this standard.
41、3.12 CONTROL, TYPE M2 A manual control that cannot function as an automatically reset device if the reset means is held in the reset or on position. MAY 21, 2009 ELECTRIC DRY-BATH HEATERS - UL 875 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FRO
42、M UL CONSTRUCTION 3A Component Specications 3A added November 16, 2011 3A.1 A component of a product covered by this standard shall: a) comply with the requirements for that component as specied in this standard; b) be used in accordance with its rating(s) established for the intended conditions of
43、use; c) be used within its established use limitations or conditions of acceptability; and d) additionally comply with the applicable requirements of this end product standard. 3A.2 Specic components are incomplete in construction features or restricted in performance capabilities. Such components a
44、re intended for use only under limited conditions, such as certain temperatures not exceeding specied limits, and shall be used only under those specic conditions. Exception No. 1: A component of a product covered by this standard is not required to comply with a specic component requirement that: a
45、) involves a feature or characteristic not required in the application of the component in the product, b) is superseded by a requirement in this standard, or c) is separately investigated when forming part of another component, provided the component is used within its established ratings and limit
46、ations. Exception No. 2: A component complying with a component standard other than those cited in this standard is acceptable if: a) the component also complies with the applicable component standard indicated in this standard; or b) the component standard: 1) is compatible with the ampacity and ov
47、ercurrent protection requirements in the National Electrical Code, NFPA 70, where appropriate; 2) considers long-term thermal properties of polymeric insulating materials in accordance with the Standard for Polymeric Materials Long Term Property Evaluations, UL 746B, and 3) any use limitations of th
48、e other component standard is identied and appropriately accommodated in the end use application. For example, a component used in a household application, but intended for industrial use and complying with the relevant component standard may assume user expertise not common in household applications. NOVEMBER 16, 2011 ELECTRIC DRY-BATH HEATERS - UL 875 8A
