1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 875 Electric Dry-Bath Heaters STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORI
2、ZED FOR FURTHER REPRODUCTION 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 update requirements for coin cell batteries. The revised requiremen
3、ts are substantially in accordance with Proposal(s) on this subject dated August 4, 2017. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. All rights reserved. No part of this publication may be reproduced, stored
4、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 implied warranties
5、 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 Standard, even if UL o
6、r 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 to defend, indemn
7、ify, 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. SEPTEMBER 20, 2017 UL 875 tr
8、1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 20, 2017 UL 875 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 21, 2009 (Title Page Reprinted:
9、 September 20, 2017) 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 were titled Electric Dry Bath Heaters. The
10、 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, 2000 Eighth Edition March, 2004 Ninth Edition
11、May 21, 2009 This ANSI/UL Standard for Safety consists of the Ninth Edition including revisions through September 20, 2017. The most recent designation of ANSI/UL 875 as an American National Standard (ANSI) occurred on September 20, 2017. ANSI approval for a standard does not include the Cover Page,
12、 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 Standards Development System (CSDS) at https:/. ULs Standards for Safety are copyr
13、ighted 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 UL. COPYRIGHT 2017 UNDERWRITERS LABORATORIES INC. ANSI/UL 875-2017
14、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 20, 2017 ELECTRIC DRY-BATH HEATERS - UL 875 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS I
15、NTRODUCTION 1 Scope .5 2 General 6 2.1 Components .6 2.2 Units of measurement .6 2.3 Undated references .6 3 Glossary .6 CONSTRUCTION 3A Component Specications 7 3B Component Specications 7 3B.1 General 7 3B.2 Button or coin cell batteries of lithium technologies 8 3C Safety Critical Functions 8A 4
16、Frame and Enclosure 8B 5 Risk of Injury to Persons 16A 5A Button or Coin Cell Batteries of Lithium Technologies .16B 6 Assembly 16B 7 Corrosion Resistance .17 8 Supply Connections 18 8.1 General 18 8.2 Field-wiring compartment .18 8.3 Wire-bending space .20 8.4 Field-wiring terminals and leads .21 9
17、 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 Splices 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
18、 Elements .28 11.1 General .28 11.2 Sheathed heating element .28 11.3 Guarding of heating elements 28 12 Electrical Insulation .29 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 De
19、tectors / Interrupters .30C 16B Fuses and Circuit Breakers .30C 17 Short-Circuit Protection 30D 17A Light Sources and Associated Components .31 18 Lampholders .32 SEPTEMBER 20, 2017 ELECTRIC DRY-BATH HEATERS - UL 875 2AUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION W
20、ITHOUT PERMISSION FROM UL 19 Switches .32 20 Receptacles 33 20A Printed Wiring Boards 33 20B Semiconductors and Small Electronic Components 33 21 Automatic Temperature Controls 34 21.1 General .34 21.2 Terminals and actuating members of temperature controls 36 21A Liquid Level Controls 36 21B Pressu
21、re Controls .36 22 Spacings 36 22.1 General .36 22.2 Barriers .38 22A Clearance and Creepage Distances .38A 23 Grounding and Bonding .39 PERFORMANCE 24 Power Input Test .40 25 Temperature Test .40 26 Minimum Room Air Temperature Test .48 27 Insulation Resistance Test .48 28 Dielectric Voltage-Withst
22、and 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 30.5 Stalled fan .54A 30.6 Component breakdown 54A 31 Motor Switch Overload Test 54B 32 Stability Test 54B 33 Static Loading Te
23、st 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 MARKINGS 38 Details .59 39 Permanence of Markings 65 INSTALLATION INSTRUCTIONS 40 Details .66 SEPTEMBER 20, 2017 ELECTRIC DRY-B
24、ATH HEATERS - UL 875 2BUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL STATIONARY OR PORTABLE COMBINATION ROOM b) A combination of a heater unit and a prefabricated, factory-built rigid room in which the assembled combination may be specied
25、for eld installation, or that may be supplied 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 rigid cabinet that is constructed to enclose all but
26、 the users head. The unit is provided with a power 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 cov
27、ered in separate, individual requirements. 1.3 Throughout 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 ma
28、de and nished with the degree of uniformity and 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
29、re or of electric shock or injury to persons shall 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 c
30、onict with specic requirements or provisions of 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. JULY 26, 2017 ELECTRIC DRY-BATH HEATERS -
31、UL 875 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2 General 2.1 Components Section 2.1 revised and relocated as Section 3A.1.1 2.2 Units of measurement 2.2.1 Values stated without parentheses are the requirement. Values in parentheses
32、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 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpr
33、eted as referring to the latest edition of that code or standard. 3 Glossary 3.1 For the purpose of this standard the following denitions apply. 3.2 CONTROL, AUTOMATIC ACTION A device in which the transmission and operation of at least one function are produced by initiation which is not the result
34、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 or rest the control. 3.5 CONTROL, OPERATING A device where the operation of which starts or regulates the appliance during normal operation. A regulat
35、ing 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, re, or injury (including thermal burns and hypothermia) to persons during abnormal operation of the appliance. A limit thermostat is a protective cont
36、rol. 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 CONTROL, TYPE 1.D ACTION The actuation of a manual control designed so that disconnection can neither be prevented nor inhibited, by any reset mechanism an
37、d 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, 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 automati
38、cally 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 -35C (-31F) with the reset mechanism in the normal position. NOVEMBER 29, 2016 ELECTRIC DRY-BATH HEATERS - UL 875 6UL COPYRIGHTED MATERIAL NOT AUTHO
39、RIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 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 thi
40、s standard. 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. 3.13 SAFETY CRITICAL FUNCTION (SCF) Control, protection and monitoring functions which are being relied upon to reduce the risk of re, elec
41、tric shock, or casualty hazards. CONSTRUCTION 3A Component Specications Section 3A is revised and relocated as Section 3B 3B Component Specications 3B.1 General 3B.1.1 A component of a product covered by this standard shall: a) Comply with the requirements for that component as specied in this stand
42、ard; b) Be used in accordance with its rating(s) established for the intended conditions of 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. 3B.1.2 Specic components are in
43、complete 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. Exception No. 1: A component of a product
44、covered by this standard is not required to comply with a specic component requirement that: a) 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
45、 of another component, provided the component is used within its established ratings and limitations. 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: NOVEMBER 29, 2016 ELECTRIC DRY-BATH HEATERS - UL 875 7
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