1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1030 Sheathed Heating ElementsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REP
2、RODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Sheathed Heating Elements, UL 1030 Eighth Edition, Dated March 31, 2015 Summary of Topics This new edition of ANSI/UL 1030 includes the following changes in requirements: Deleted the reference of using X-rays to determin
3、e insulation spacing Added an Exception for testing in a forced air ambient condition The revised requirements are substantially in accordance with Proposal(s) on this subject dated February 6, 2015. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or
4、 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 of merchantability or tn
5、ess 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 or an authorized UL repres
6、entative 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
7、 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. The requirements in this Standard are now in effect,
8、except for those paragraphs, sections, tables, gures, and/or other elements of the Standard having future effective dates as indicated in the note following the affected item. The prior text for requirements that have been revised and that have a future effective date are located after the Standard,
9、 and are preceded by a SUPERSEDED REQUIREMENTS notice. MARCH 31, 2015 UL 1030 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 31, 2015 UL 1030 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION O
10、R DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 31, 2015 1 UL 1030 Standard for Sheathed Heating Elements First Edition July, 1973 Second Edition July, 1975 Third Edition February, 1979 Fourth Edition September, 1986 Fifth Edition November, 1991 Sixth Edition November, 1994 Seventh Edition November,
11、 2004 Eighth Edition March 31, 2015 This ANSI/UL Standard for Safety consists of the Eighth Edition. The most recent designation of ANSI/UL 1030 as an American National Standard (ANSI) occurred on March 31, 2015. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title
12、Page, or effective date information. The Department of Defense (DoD) has adopted UL 1030 on January 2, 1992. The publication of revised pages or a new edition of this Standard will not invalidate the DoD adoption. Comments or proposals for revisions on any part of the Standard may be submitted to UL
13、 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 printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and al
14、l copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2015 UNDERWRITERS LABORATORIES INC. ANSI/UL 1030-2015UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 31, 2015
15、SHEATHED HEATING ELEMENTS - UL 1030 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .4 2 Glossary .4 3 Units of Measurement .5 4 Undated References 5 CONSTRUCTION 5 General 6 6 Insulation 7
16、 7 Spacings .7 PERFORMANCE 8 General 8 9 Power Input Test 9 10 Dielectric Voltage-Withstand Test .10 10.1 General .10 10.2 Quadrature method .11 10.3 Single-phase method .11 11 Resistance to Moisture Test 11 12 Leakage Current Test .12 13 Thermal Endurance Test 14 14 Temperature Test .15 MANUFACTURI
17、NG AND PRODUCTION TESTS 15 Dielectric Voltage-Withstand Test 16 RATING 16 Details .17 MARKING 17 Details .17 MARCH 31, 2015 SHEATHED HEATING ELEMENTS - UL 1030 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These r
18、equirements cover metal-sheathed heating elements intended for use in appliances and equipment that comply with the requirements for such appliances and equipment. 1.2 These requirements cover sheathed heating elements rated 600 volts or less. 1.3 These requirements do not cover heating elements for
19、 use in equipment for use in hazardous locations as dened in the National Electrical Code, NFPA 70. 1.4 Wherever the terms heating element and element are used in these requirements, they are intended to mean a sheathed heating element as dened in 2.4. 2 Glossary 2.1 For the purpose of this standard
20、 the following denitions apply. 2.2 DIELECTRIC VOLTAGE WITHSTAND The ability of a heating element to withstand specied voltages applied between current-carrying parts and dead metal parts for specied times without ashover or puncture. 2.3 LEAKAGE CURRENT A current, including a capacitively coupled c
21、urrent, that may be conveyed between exposed conductive surfaces of a heating element and ground. 2.4 SHEATHED HEATING ELEMENT A resistance element that is usually encased in magnesium oxide or encased in a similar insulating material that is, in turn, surrounded by a metal sheath. 2.5 SHEATH WATTAG
22、E DENSITY The watts per unit area of actively heated sheath surface area. The actively heated sheath surface area is considered to be the area of the exposed surface of that portion of the sheathed heating element between the terminal pins. See Figure 2.1. This is generated text for gtxt. MARCH 31,
23、2015 SHEATHED HEATING ELEMENTS - UL 1030 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2.6 TEST VOLTAGE The voltage required to obtain rated watt density, but no less than the rated voltage of the heating element. 3 Units of Measurement 3
24、.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 4 Undated References 4.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of t
25、hat code or standard. Figure 2.1 Sheath wattage density MARCH 31, 2015 SHEATHED HEATING ELEMENTS - UL 1030 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONSTRUCTION 5 General 5.1 The acceptability of a heating element in any equipment or
26、 appliance depends upon its ability to withstand continued use under the conditions that prevail in actual service. In addition to the requirements contained herein, further considerations and investigations may be necessary, based upon the intended installation and use of the sheathed heating eleme
27、nt. 5.2 A sheathed heating element shall employ materials and components throughout that meet the intent of the requirement, and shall be made and nished with the degree of uniformity and grade of workmanship practicable in a well-equipped factory. 5.3 If a material or alloy not included in Table 14
28、.1, a material provided with a coating, or a composite sheath utilizing dissimilar materials inside and outside is used, it shall be investigated to determine that the material is acceptable for the purpose and that it affords protection equivalent to that of the materials included in Table 14.1. 5.
29、4 After being formed, the sheath of a heating element shall have a thickness not less than specied in Table 5.1. Table 5.1 Sheath thickness Application Minimum thickness Inch (mm) Surface-unit elements 0.016 (0.41) Oven elements and space-heater elements: Stationary appliances 0.016 (0.41) Portable
30、appliances 0.013 (0.33) Elements other than mentioned above, protected against mechanical damage 0.013 (0.33) 5.5 The values in Table 5.1 are intended to specify a minimum thickness for a sheath made of steel, titanium, copper, copper-clad steel, or steel and nickel alloys. Increased thickness may b
31、e required, based upon the particular end-use application of the heating element. A sheath made of aluminum or aluminum alloy and a sheath having a thickness less than specied in Table 5.1 is to be investigated under conditions of actual service to determine if it has the necessary mechanical proper
32、ties and will withstand the most severe conditions likely to be met in service. MARCH 31, 2015 SHEATHED HEATING ELEMENTS - UL 1030 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 6 Insulation 6.1 An insulating washer, a bushing, or the like
33、, that is an integral part of a heating element shall be of a material resistant to moisture, such as porcelain, and shall be acceptable for use at the maximum temperature to which it will be subjected under conditions of actual use. Such parts shall have adequate mechanical strength and rigidity to
34、 withstand the stress of actual service. 6.2 Insulating material employed in an integral part of a heating element, such as a terminal block, or the like, shall be strong, not easily ignited, and resistant to moisture. A material other than porcelain, phenolic, or one that is known to be acceptable
35、for the support of current-carrying parts shall be investigated under conditions of actual service to determine if it has the necessary electrical and mechanical properties and will withstand the most severe conditions likely to be met in service. 6.3 The thickness of magnesium oxide (MgO) or other
36、similar insulating material between the resistance element and the inside of the sheath, and the material of an end seal between the terminal pin and the inside of the sheath shall not be: a) Less than 0.016 inch (0.41 mm) for elements rated 300 volts or less, and b) Less than 0.031 inch (0.79 mm) f
37、or elements rated more than 300 volts. 7 Spacings 7.1 A spacing, through air and over surface, of not less than 1/16 inch (1.6 mm) between live parts of opposite polarity and between live parts and dead metal parts shall be maintained at or near the end of the sheath of a heating element rated 300 v
38、olts or less. For an element rated more than 300 volts, the spacings at the end of the sheath shall not be less than 1/4 inch (6.4 mm). Exception No. 1: When exact centering of a terminal pin is required to maintain the 1/16 inch spacing, a spacing of 3/64 inch (1.2 mm) in one location meets the int
39、ent of the requirement. Exception No. 2: For an element rated 300 volts or less, a spacing not less than 3/64 inch measured between a terminal pin and the sheath is acceptable at a closed-in void, such as between an end seal and the element insulating material. See Figure 7.1. Exception No. 3: For a
40、n element rated more than 300 volts, a spacing not less than 3/64 inch measured between terminal pin and sheath is acceptable when a closed-in void is not present between an end seal and element insulation of dissimilar materials. This is generated text for gtxt. MARCH 31, 2015 SHEATHED HEATING ELEM
41、ENTS - UL 1030 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 7.2 Spacings at wiring terminals shall be in accordance with the requirements for the end-use product. PERFORMANCE 8 General 8.1 The performance of a heating element shall be in
42、vestigated by subjecting representative samples to the tests described in Sections 9 14. Three samples in a set are to be subjected to the tests specied in Table 8.1. Insofar as practicable, the tests shall be conducted in the sequence specied in Table 8.1. Figure 7.1 Spacings at closed-in voids MAR
43、CH 31, 2015 SHEATHED HEATING ELEMENTS - UL 1030 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Table 8.1 Test sequence Sample set Number of samples Test Paragraph A3 Dielectric 10.1.1 Resistance to Moisture (Humidity Conditioning) 11.1 Ins
44、ulation Resistance 11.1(a) Dielectric 11.1(b) B3 Power Input 9.1 Dielectric 10.1.1 Leakage Current 12.1 Endurance 13.1 Temperature 14.1 Leakage Current or Insulation Resistance 14.4(a) or 14.4(b) Dielectric 14.4(c) 8.2 For all tests, the heating element is to be mounted or installed in a manner that
45、 simulates its intended end-use application. 8.3 A representative test sample as mentioned in 8.1 is one that represents the combination of factors in (a) (d) that results in the most severe test conditions for each material of sheath used. a) Diameter of sheath; b) Sheath wattage density (W/in. 2 )
46、; c) Number and sharpness of bends; and d) Rated voltage. 8.4 All test are to be performed at test voltage, see 2.6, except for the Thermal Endurance Test, Section 13, which is to be performed at 108 percent of test voltage. 9 Power Input Test 9.1 At rated voltage, the power input to a heating eleme
47、nt shall not be more than 105 percent of its marked wattage or volt-ampere rating. 9.2 To determine whether a heating element complies with the requirement in 9.1, the maximum power input is to be measured with the element connected to a supply circuit adjusted to: a) Other than as noted in (b), the
48、 highest marked voltage rating; or b) If the highest marked voltage falls within a range of 100 120, 220 240, 257 277, or 440 480 volts, the highest voltage of the range. MARCH 31, 2015 SHEATHED HEATING ELEMENTS - UL 1030 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTI
49、ON WITHOUT PERMISSION FROM UL 9.3 Power input is to be recorded when element temperatures have stabilized. A temperature is considered stabilized when three successive readings taken at intervals of 10 percent of the previously elapsed duration of the test, but not less than ve-minute intervals, indicate no change. 10 Dielectric Voltage-Withstand Test 10.1 General 10.1.1 A heating element shall withstand without breakdown for one minute the application of a 60-hertz essentially sinus
