1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 515 Electrical Resistance Trace Heating for Commercial ApplicationsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MA
2、TERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Electrical Resistance Trace Heating for Commercial Applications, UL 515 Second Edition, Dated July 17, 2015 Summary of Topics This new edition of UL 515 are being issued to transition
3、 it to electrical resistance trace heating for commercial applications only. The new and revised requirements are substantially in accordance with Proposal(s) on this subject dated November 21, 2014 and March 23, 2015. All rights reserved. No part of this publication may be reproduced, stored in a r
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7、nd 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. JULY 17, 2015 UL 515 tr1UL COPYRIG
8、HTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JULY 17, 2015 UL 515 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JULY 17, 2015 1 UL 515 Standard for Electrical Resi
9、stance Trace Heating for Commercial Applications The rst edition was titled the Standard for Electrical Resistance Heat Tracing for Commercial and Industrial Applications. First Edition May, 2001 Second Edition July 17, 2015 This UL Standard for Safety consists of the Second Edition. Comments or pro
10、posals 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
11、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 2015 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DI
12、STRIBUTION WITHOUT PERMISSION FROM UL JULY 17, 2015 UL 515 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 .5 3 Components 6 4 Units of Measurement .6 5 Undated References 6 6
13、 Referenced Publications .6 CONSTRUCTION 7 Conductor Insulating Materials 7 8 Grounding Component .7 9 Supply Connections .8 9.1 Cord-and-plug connected 8 9.2 Permanently connected .8 10 Accessory Equipment 8 PERFORMANCE 11 General .8 12 Temperature Test 9 MARKINGS 13 General 10 INSTRUCTIONS 14 Inst
14、allation Instructions 10 JULY 17, 2015 UL 515 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover electrical resistance trace heating for commercial applications as applied to piping, vessels, t
15、raced tube bundles, and mechanical equipment. Trace heating includes heating panels and associated parts. This equipment is intended for installation in ordinary locations in accordance with the following installation guidelines: a) National Electrical Code, ANSI/NFPA 70, Article 427, and b) IEEE St
16、andard for the Testing, Design, Installation, and Maintenance of Electrical Resistance Trace Heating for Commercial Applications, IEEE 515.1. 1.2 These requirements also cover commercial applications of electrical resistance trace heating for deicing roofs, gutters, and pavement. This equipment is i
17、ntended for installation in ordinary locations in accordance with the following installation guidelines: a) National Electrical Code, ANSI/NFPA 70, Article 426; and b) IEEE Standard for the Testing, Design, Installation, and Maintenance of Electrical Resistance Trace Heating for Commercial Applicati
18、ons, IEEE 515.1. 1.3 Trace heating covered by this Standard is intended for applications where it is exposed to weather, unless specic markings and instructions limit the applications. 1.4 Trace heating may be installed on metal or rigid plastic pipes. Unless specic recommendations are made for the
19、plastic pipe material to be heated, plastic pipes are considered to have a maximum long-term thermal exposure limit of 50C (122F). 1.5 Other related equipment standards: a) For Embedded Floor Warming Applications, refer to the Standard for Electric Space Heating Cables, UL 1673. b) For Mobile Home P
20、ipe Heating Cables, refer to the Outline of Investigation, UL 1462. c) For Residential Pipe Heating Cables, refer to the Outline of Investigation, UL 2049. d) For Roof and Gutter De-Icing Cable Units, refer to the Outline of Investigation, UL 1588. 1.6 This Standard does not cover electrical resista
21、nce trace heating for industrial applications such as chemical plants, pipelines, reneries, and other similar locations where the trace heating is expected to be installed by qualied personnel. JULY 17, 2015 UL 515 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITH
22、OUT PERMISSION FROM UL 2 Glossary 2.1 For the purpose of this Standard the following denitions apply. 2.2 COLD LEAD An electrically insulated conductor used to connect a heating conductor to the branch-circuit conductors and designed so as not to produce appreciable heat. 2.3 COMMERCIAL APPLICATIONS
23、 Applications such as hotels, warehouses, office buildings, and other non-residential locations where the electrical resistance trace heating is expected to be installed by qualied personnel. Examples of commercial applications of electrical resistance trace heating are to prevent freezing, or to ma
24、intain temperature in water piping. 2.4 ELECTRICAL RESISTANCE TRACE HEATING The utilization of electric trace heaters, other electric heating devices, and support components that are externally applied and used to maintain or raise the temperature of uids/materials in piping and associated equipment
25、. 2.5 HEATING PANEL The heating portion of the trace heating that has series or parallel connected heating elements having sufficient exibility to conform to the shape of the surface to be heated. 2.6 METALLIC COVERING A metal sheath or braid used to provide physical protection for heating cable and
26、, in some cases, to provide an electrical ground path. 2.7 OVERJACKET A polymeric sheath, sometimes fabric reinforced, applied over the metallic covering. 2.8 THERMAL INSULATION Material having air- or gas-lled pockets, void spaces, or heat-reective surfaces that, when properly applied, will retard
27、the transfer of heat with reasonable effectiveness under ordinary conditions. 2.9 TRACE HEATER The part of the trace heating that is intended to produce heat. 2.10 TRACE HEATING The utilization of electric heating cables, other electric heating devices, and support components that are applied and us
28、ed to reduce or eliminate ice build-up, to prevent the freezing of pipes or surfaces, or to maintain a pipe or surface at a prescribed temperature. 2.11 TRACED TUBE BUNDLES Pre-traced and thermally insulated instrument tubing that is used for uid transport, uid containment, or uid conditioning syste
29、ms. The bundle is factory fabricated and consists of tubing, heating cable, thermal insulation, and weatherproof jacket. JULY 17, 2015 UL 515 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3 Components 3.1 Except as indicated in 3.2, a com
30、ponent of a product covered by this standard shall comply with the requirements for that component. 3.2 A component is not required to comply with a specic requirement that: a) Involves a feature or characteristic not required in the application of the component in the product covered by this standa
31、rd, or b) Is superseded by a requirement in this standard. 3.3 A component shall be used in accordance with its rating established for the intended conditions of use. 3.4 Specic components are incomplete in construction features or restricted in performance capabilities. Such components are intended
32、 for use only under limited conditions, such as certain temperatures not exceeding specied limits, and shall be used only under those specic conditions. 4 Units of Measurement 4.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information.
33、 5 Undated References 5.1 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 that code or standard. 6 Referenced Publications ASTM Standards: ASTM B117 Standard Practice for Operating of Salt Spray (Fo
34、g) Apparatus ASTM E11 Standard Specication for Woven Wire Test Sieve Cloth and Test Sieves IEEE Standards: ANSI/IEEE 515 IEEE Standard for the Testing, Design, Installation, and Maintenance of Electrical Resistance Trace Heating for Industrial Applications IEEE 515.1 IEEE Standard for the Testing, D
35、esign, Installation, and Maintenance of Electrical Resistance Trace Heating for Commercial Applications Note: IEEE Standards may be obtained from the Institute of Electrical and Electronics Engineers, Inc., 345 E. 47th St., New York, NY 10017, USA. JULY 17, 2015 UL 515 6UL COPYRIGHTED MATERIAL NOT A
36、UTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL NFPA Standards: ANSI/NFPA 70 National Electrical Code UL Standards: UL 213 Standard for Rubber Gasketed Fittings for Fire Protection Service UL 498 Standard for Attachment Plugs and Receptacles UL 969 Standard for Marking
37、and Labeling Systems CONSTRUCTION 7 Conductor Insulating Materials 7.1 An insulated conductor, including both the heating cable and cold leads, shall be rated for the intended voltage and temperature. 7.2 All insulated conductors in their nal form (including any overjacket and splices) shall be eval
38、uated for outdoor exposure. This evaluation shall include the weatherometer test as described in Section 9 of Subject 1588, Outline of Investigation for Roof and Gutter De-Icing Cable Units, using either the carbon or xenon arc. Exception: The trace heating is not required to be subjected to the wea
39、therometer test when specic markings or instructions limit the applications to locations where the trace heating is not exposed to weather. 8 Grounding Component 8.1 A heating cable shall be surrounded by a grounded metal covering. A heating panel shall have a grounded metal covering over the heatin
40、g element and its electrical insulation on the side opposite the side attached to the surface to be heated. A metal braid on a heating cable shall provide at least 50-percent coverage for trace heating intended for commercial applications. 8.2 For trace heating connected to the power supply by an at
41、tachment plug, the grounding component shall be connected to the grounding pin of the attachment plug. 8.3 For trace heating intended for permanent connection to the power supply, the grounding component shall be provided with means for connection to the equipment grounding conductor in accordance w
42、ith the National Electrical Code, ANSI/NFPA 70. JULY 17, 2015 UL 515 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 9 Supply Connections 9.1 Cord-and-plug connected 9.1.1 For cord-and-plug connected trace heating, the cold leads shall be T
43、ype SJ or heavier exible cord with appropriate voltage, temperature, and environmental ratings, and terminated by a grounding type attachment plug. The trace heating shall be rated 16 ampere maximum, for use on a 20-ampere maximum branch circuit. 9.1.2 An attachment plug shall be the grounding type
44、and shall have a voltage rating equal to the rated voltage of the trace heating , and a current rating not less than 125 percent of the current rating of the trace heating. 9.1.3 An attachment plug shall comply with the Standard for Attachment Plugs and Receptacles, UL 498, for the intended applicat
45、ion. 9.2 Permanently connected 9.2.1 Trace heating intended for connection to a permanent wiring system shall be provided with eld-wiring leads and means for the connection to the power supply. The free length of the leads inside an outlet box or wiring compartment shall be at least 150 mm (6 inches
46、). 9.2.2 The eld-wiring leads shall have a current rating not less than the current rating of the trace heating. 10 Accessory Equipment 10.1 Accessory equipment provided as part of trace heating, such as thermostats, timers, sensors, ttings, switches, splice kits, and the like, shall comply with app
47、licable requirements for the type of equipment involved. PERFORMANCE 11 General 11.1 Trace heating intended for commercial applications shall comply with the general product testing specied in IEEE 515.1, Standard for the Testing, Design, Installation, and Maintenance of Electrical Resistance Trace
48、Heating for Commercial Applications, and Temperature Test, Section 12. Exception: Trace heating that has been found to comply with the respective requirements as part of a separate investigation is not required to be subjected to the tests for performance after thermal aging, water resistance, defor
49、mation, cold bend, and UV and condensation in IEEE 515.1. JULY 17, 2015 UL 515 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 12 Temperature Test 12.1 Trace heating, when operated at its maximum ratings in accordance with the manufacturers installation instructions, shall not result in temperatures higher than the continuous rating of the components being used. Temperatures attained shall not be greater than those specied in Ta
