1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1278 Movable and Wall- or Ceiling-Hung Electric Room Heaters STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL C
2、OPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Movable and Wall- or Ceiling-Hung Electric Room Heaters, UL 1278 Fourth Edition, Dated March 21, 2014 Summary of Topics Revision pages have been issued for the Standard f
3、or Safety for Movable and Wall- or Ceiling- Hung Electric Room Heaters, UL 1278, to reect the latest ANSI approval date and to incorporate the proposals dated December 11, 2015 and March 18, 2016, which include the following: Polymeric materials enclosure requirements. Wire size AWG for internal wir
4、ing based on circuit. The new and revised requirements are substantially in accordance with Proposal(s) on this subject dated December 11, 2015 and March 18, 2016. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. A
5、ll rights reserved. No part of this publication may be reproduced, stored 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
6、expressed or implied, including but not limited to, the implied warranties 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 ari
7、sing out of the use of or the inability to use this Standard, even if UL or 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 t
8、he electronic versions of ULs Standards for Safety agree to defend, indemnify, 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 electroni
9、c Standard on the purchasers computer system. MAY 3, 2016 UL 1278 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 3, 2016 UL 1278 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION
10、WITHOUT PERMISSION FROM UL MARCH 21, 2014 (Title Page Reprinted: May 3, 2016) 1 UL 1278 Standard for Movable and Wall- or Ceiling-Hung Electric Room Heaters First Edition September, 1992 Second Edition September, 1994 Third Edition June, 2000 Fourth Edition March 21, 2014 This ANSI/UL Standard for S
11、afety consists of the Fourth Edition including revisions through May 3, 2016. The most recent designation of ANSI/UL 1278 as an American National Standard (ANSI) occurred on May 3, 2016. ANSI approval for a standard does not include the Cover Page, Transmittal Pages and Title Page. Comments or propo
12、sals 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 printed nor electronic copy of
13、 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 2016 UNDERWRITERS LABORATORIES INC. ANSI/UL 1278-2016UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER RE
14、PRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 21, 2014 MOVABLE AND WALL- OR CEILING-HUNG ELECTRIC ROOM HEATERS - UL 1278 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .9 2 G
15、eneral 9 2.1 General 9 2.2 Terminology .9 3 Glossary 9 4 Components .10B 4.1 General .10B 4.2 Attachment plugs, receptacles, connectors, and terminals 13 4.3 Controls 14 4.4 Internal wiring .16 4.5 Film-coated wire (magnet wire) 17 4.6 Printed wiring boards 17 4.7 Semiconductors and small electronic
16、 components .17 4.8 Supplemental insulation, insulating bushings, and assembly aids 18 4.9 Switches .19 4.10 Transformers 20 5 Units of Measurement 20 6 References .20 CONSTRUCTION 7 Enclosure .20 8 Accessibility of Live Parts .23 9 Accessibility of Moving Parts 31 10 Guarding of Heating Elements .3
17、2 10.1 General .32 10.2 Panel-type heaters 36 11 Parts Subject to Pressure 37 12 Polymeric Materials 39 13 Heat Transfer Fluids .39 14 Assembly of Components 39 15 Protection Against Corrosion 40 16 Supply Connections .40 17 Special Protection Devices .45 18 Static Load Test For Hanging Means 45 19
18、Current-Carrying Parts .46 20 Internal Wiring 46 20.1 General .46 20.2 Protection of wiring 47 20.3 Wire connectors .48 20.4 Separation of circuits 49 21 Heating Elements .49 22 Heating Element Supports 50 23 Electrical Insulation 50 24 Thermal Insulation .50 25 Motors .51 26 Motor Overload Protecti
19、on 52 27 Overcurrent Protection .53 MAY 3, 2016 MOVABLE AND WALL- OR CEILING-HUNG ELECTRIC ROOM HEATERS - UL 1278 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 27.1 General .53 27.2 Heating elements .54 27.3 Motors and motor-circuits 54 2
20、7.4 Tapped high-voltage control circuits .54 27.5 High-voltage transformers 56 27.6 Low-voltage transformers .57 28 Secondary Circuits 57 28.1 General .57 28.2 Limited-energy-secondary circuits .58 29 Temperature Limiting Means .59 30 Alarms .60 31 Lampholders 61 32 Pilot Lights .61 33 Switches .62
21、34 Automatic Controls and Control Circuits 64 34.1 General .64 34.2 Terminals and actuating members of safety and temperature limiting controls .65 35 Spacings .66 36 Grounding 67 PERFORMANCE 37 General 68 38 Power Input Test 68 39 Leakage Current Test 68 40 Normal Temperature Tests .71 40.1 General
22、 .71 40.2 Temperature controls 75 40.3 Specied test conditions .76 41 Alarm Device Endurance Test 77 42 Abnormal Operation Tests 77 42.1 General .77 42.2 Overvoltage test 78 42.3 Stalled-fan test 79 42.4 Tip-over test 79 42.5 Vertical-wall test .80 42.6 Terry cloth drape test 81 42.7 Terry cloth ban
23、d drape test .81 42.8 Wall-hung heaters .83 42.9 Abnormal ambient test .86 42.10 Motoroverloadandstalledmotormotorsprotectedbyaremoteprotectivedevice .87 42.11 Impedance-protected motors .88 42.12 Motor connected across heating elements .89 43 Endurance Test .90 43.1 Temperature Control .90 43.2 Ele
24、ctrical wiring .90 44 Short Circuit Tests 91 45 Overload Test High-Voltage Transformers 93 46 Burnout Test High-Voltage Transformers .93 47 Component Failure Test 94 48 Dielectric Voltage-Withstand Test 94 49 Insulation Resistance Test 95 50 Water Spray Test 95 MARCH 21, 2014 MOVABLE AND WALL- OR CE
25、ILING-HUNG ELECTRIC ROOM HEATERS - UL 1278 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 51 Stability of Movable Heaters 98 52 Element Support Impact Tests 98 53 Drop Test 99 54 Test for Permanence of Cord Tag 101 54.1 General .101 54.2 T
26、est conditions 101 54.3 Test method .101 55 Protection Against Injury to Persons Test .102 56 Knob Securement Test 103 57 Strength of Adjustment Stop Test 103 58 Hydrostatic Test 104 59 Strain Relief Test .104 60 Permanence of Marking .105 MANUFACTURING AND PRODUCTION TESTS 61 Production-Line Dielec
27、tric Voltage-Withstand 105 62 Production-Line Grounding Continuity .107 63 Production-Line Tip Over 107 64 Production Leakage Test (Fluid-Filled Heaters) 107 65 Hydrostatic Test 107 RATINGS 66 Details .108 MARKINGS 67 Details .108 68 Instructions for Use and Care 112 68.1 General .112 68.2 Important
28、 instructions .113 68.3 User instructions .115 68.4 Grounding instructions 116 68.5 Heater carton information .116 69 Cord Tag Markings .117 SUPPLEMENT SA - CERTAIN RADIANT ROOM HEATERS INTRODUCTION SA1 Scope SA1 CONSTRUCTION SA2 Enclosure .SA1 SA2.1 General SA1 SA2.2 Guards SA3 SA3 Stability .SA3 S
29、A4 Supply Connections .SA3 MARCH 21, 2014 MOVABLE AND WALL- OR CEILING-HUNG ELECTRIC ROOM HEATERS - UL 1278 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SA5 Internal Wiring SA4 SA6 Automatic Controls and Control Circuits .SA4 SA7 Spacing
30、s SA5 PERFORMANCE SA8 General SA6 SA9 Normal Temperature Test SA6 SA9.1 General SA6 SA9.2 Normal temperature .SA7 SA10 Padded Surface and Blanketing Test SA8 SA11 Curtain Drape Test .SA9 SA12 Shredded Paper Test .SA9 MANUFACTURING AND PRODUCTION TESTS SA13 General .SA9 MARKING SA14 Details .SA11 SUP
31、PLEMENT SB - HEATERS INTENDED FOR USE IN BATHROOMS, LAUNDRY AREAS AND SIMILAR INDOOR LOCATIONS INTRODUCTION SB1 Scope SB1 CONSTRUCTION SB2 Enclosure .SB1 SB3 Current-Carrying Parts SB1 SB4 Thermal Insulation SB2 SB5 Immersion Detection Circuit Interrupters (IDCIS) .SB2 SB6 Ground Fault Circuit Inter
32、rupters (GFCIS) .SB3 SB7 Other Protective Devices SB3 SB8 Switches .SB3 SB9 Grounding .SB3 PERFORMANCE SB10 Immersion Leakage Current Tests SB4 SB10.1 General SB4 SB10.2 Rising water immersion .SB5 SB10.3 Drop immersion SB5 SB10.4 Tip-over immersion test .SB5 SB10.5 Saturation immersion test .SB5 SB
33、11 Dew Point Test SB6 SB12 Splash Test SB6 MARCH 21, 2014 MOVABLE AND WALL- OR CEILING-HUNG ELECTRIC ROOM HEATERS - UL 1278 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MANUFACTURING AND PRODUCTION TESTS SB13 Production Line Trip-Time Me
34、asurement SB6 SB14 Test Button Activation .SB7 MARKINGS SB15 Details SB7 SB16 Instructions for Use and Care SB7 SUPPLEMENT SC - MOVABLE ELECTRIC ROOM HEATERS WITH SEMICONDUCTOR HEATING ELEMENTS INTRODUCTION SC1 Scope SC1 CONSTRUCTION SC2 Heating Element SC1 SC3 Fan Speed Control, Semiconductor Type
35、SC1 SC4 Switches SC1 PERFORMANCE SC5 General SC2 SC6 Input Test .SC2 SC7 Normal Temperature Test .SC2 SC8 Low Ambient Temperature Starting Test SC2 SC9 Restricted Inlet, Abnormal Operation Test .SC3 SC10 DC Offset Voltage Temperature Test SC3 SC11 Fan Speed Controls, Abnormal Operation Tests .SC4 SC
36、12 Endurance Test SC5 SC13 Input Current Test SC5 SC14 Overload and Endurance Test .SC6 SUPPLEMENT SD - DIRECT PLUG-IN HEATERS INTRODUCTION SD1 Scope SD1 MARCH 21, 2014 MOVABLE AND WALL- OR CEILING-HUNG ELECTRIC ROOM HEATERS - UL 1278 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION
37、OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONSTRUCTION SD2 General SD1 SD3 Enclosure .SD5 SD4 Input Connections SD5 SD5 Grounding .SD5 SD6 Blade Secureness Test .SD6 SD7 Security of Input Contacts Test .SD6 SD8 Positioning .SD6 SD9 Abuse Tests General SD6 SD10 Abuse Tests Impact Tests SD7 SD11 Abus
38、e Tests Rod Pressure SD7 SD12 Abuse Tests Resistance to Crushing SD7 SD13 Abuse Tests Switch Retainment SD7 SD14 Abuse Tests Rotating Plug Assembly Torque Test .SD8 SD15 Abuse Tests Static Load-Retainer Plate .SD8 SD16 Marking .SD8 SD17 Limitations .SD8 SD18 Abnormal Operation Tests .SD8 MARCH 21, 2
39、014 MOVABLE AND WALL- OR CEILING-HUNG ELECTRIC ROOM HEATERS - UL 1278 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover movable and wall- or ceiling-hung electric room-heating equipment rated
40、600 volts or less to be employed in ordinary locations in accordance with the National Electrical Code, ANSI/NFPA 70. 1.2 These requirements do not cover xed heaters, location-dedicated heaters, baseboard heaters, duct heaters, central-heating furnaces, fan-coil units, panel- or cable-type radiant-h
41、eating equipment, electric boilers, or any other electric heating equipment or appliances that are covered in or as a part of separate, individual requirements. 2 General 2.1 General 2.1.1 If the operation of a heater involves the generation and conning under pressure of steam or other gas, consider
42、ation is to be given to the possibility of risk of explosion incident to such operation. This applies in the case of an appliance having immersed electrodes, if the electrolysis of water may result in the accumulation of oxygen and hydrogen. The appliance is not acceptable unless its strength is suc
43、h that it will withstand any risk of explosion that may be involved. 2.2 Terminology 2.2.1 Unless indicated otherwise, all voltage and current values mentioned in this standard are rms. 3 Glossary 3.1 For the purposes of this standard the following denitions apply. 3.2 ANGLE OF CRITICAL BALANCE The
44、minimum angle through which a heater must be tipped to cause it to tip over due solely to the force of gravity. 3.3 APPLIANCE COUPLER A single-outlet, female contact device for attachment to a exible cord as part of a detachable power-supply cord to be connected to an appliance inlet (motor attachme
45、nt plug). 3.4 APPLIANCE INLET (Motor Attachment Plug) A male contact device mounted on an end product appliance to provide an integral blade conguration for the connection of an appliance coupler or cord connector. 3.5 APPLIANCE (FLATIRON) PLUG An appliance coupler type of device having a cord guard
46、 and a slot conguration specied for use with heating or cooking appliances. 3.6 CHARRING WITH CROSSCHECKING Manifestation of ignition by separation of wood bers in the direction with the grain and also in the direction across the grain. 3.7 COMMERCIAL/INDUSTRIAL HEATER Any heater that is either: a)
47、Rated 2 kilowatts or greater and marked as a commercial/industrial heater in accordance with 67.10, MARCH 21, 2014 MOVABLE AND WALL- OR CEILING-HUNG ELECTRIC ROOM HEATERS - UL 1278 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL b) Rated gr
48、eater than 250 volts, c) A polyphase heater, or d) Rated greater than 6 kilowatts. 3.8 COMPONENT A device or fabricated part of the appliance covered by the scope of a safety standard dedicated to the purpose. When incorporated in an appliance, equipment otherwise typically eld installed (e.g. lumin
49、aire) is considered to be a component. Unless otherwise specied, materials that compose a device or fabricated part, such as thermoplastic or copper, are not considered components. 3.9 CONTROL CIRCUIT A circuit that carries the electric signals directing the operation of a controller which, in turn, governs power delivered to a motor or other load. A control circuit does not carry the main power current. 3.10 CORD CONNECTOR A female contact device wired on exible cord for us
