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Electrical heat tracing: international harmonization-now and in the future
Electrical heat tracing: international harmonization-now and in the future
C. Sandberg
Tyco Thermal Controls
N.R. Rafferty – M. Kleinehanding – J.J. Hernandez
E.I. DuPont de Nemours & Company, Inc
Abstract: In the past, electrical heat tracing has been thought of as a minor addition to plant utilities. Today, it is recognized as a critical subsystem to be monitored and controlled. A marriage between process, mechanical, and electrical engineers must take place to ensure that optimum economic results are produced. The Internet, expert systems, and falling costs of instrumentation will all contribute to more reliable control systems and improved monitoring systems. There is a harmonization between Europe and North America that should facilitate design and installation using common components. The future holds many opportunities to optimize the design.
CLICK HERE to order complete paper
Outdoor Deicing & Snow Melting
“Snow at Argenteuil” | Claude Monet (1875)
Today our focus turns to outdoor electric deicing and snow melting wiring systems identified as suitable for the environment and installed in accordance with the manufacturer’s instructions. They work silently to keep snow load from caving in roofs and icicles falling from gutters onto pedestrian pathways.
While the voltage and ampere requirement of the product itself is a known characteristic, the characteristic 0f the wiring pathway — voltage, ampere, grounding, short circuit, disconnect and control — is relatively more complicated and worthy of our attention. Articles 426-427 of the National Electrical Code is the relevant part of the NEC
Free Access 2023 National Electrical Code
Insight into the ideas running through technical committee deliberations is provided by a review of Panel 17 transcripts:
2023 NEC Panel 17 Public Input Report (633 pages)
2023 NEC Panel 17 Public Comment Report (190 pages)
We hold Articles 427 in the middle of our priority ranking for the 2023 NEC. We find that the more difficult issues for this technology is the determination of which trade specifies these systems — architectural, electrical, or mechanical; covered in previous posts. Instead, most of our time will be spent getting IEEE consensus products in step with it, specifically ANSI/IEEE 515 and IEEE 844/CSA 293.
Comments on the Second Draft of the 2026 NEC will be received until April 18th.
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We collaborate with the IEEE Education & Healthcare Facility Committee which meets online 4 times per month in European and American time zones. Since a great deal of the technical basis for the NEC originates with the IEEE we will also collaborate with IEEE Standards Coordinating Committee 18 whose members are charged by the IEEE Standards Association to coordinate NFPA and IEEE consensus products.
Issue: [19-151]
Category: Electrical, Energy
Colleagues: Mike Anthony, Jim Harvey, Kane Howard, Jose Meijer
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Gallery: School Bond Referenda
In terms of total spend, the US elementary and secondary school industry is about twice the size of the higher education industry according to IBISWorld. About $100 billion is in play every year for both (which we cover during our Ædificare colloquia); with higher education spending only half of what elementary and secondary school systems spend on facilities.
Note that some districts are including construction for faculty housing.
Our focus remains on applying global standard to create educational settlements that are safer, simpler, lower-cost and longer-lasting — not on the hurly-burly of local school bond elections. We recommend consulting the coverage in American School & University for more detailed and more timely information.
Dahlgren Hall & “Seasoned” Coffee Mug Stories
Named after Rear Admiral John A. Dahlgren (1809-1870) an influential figure in the development of naval ordnance during the United States Civil War. It served as an armory and drill hall for midshipmen. Its open space was ideal for indoor drills and military exercises.
The hall was constructed between 1899 and 1903. Its design was overseen by Ernest Flagg, a prominent architect who designed several buildings at the Naval Academy. Today it houses the Drydock Restaurant, a gathering place for midshipmen, faculty, and visitors.
“How to Achieve the Ultimate Filthy Navy Coffee Mug”
Industrial electroheating and electromagnetic processing
The global standards for heat tracing systems are developed by IEC Technical Committee 27. The scope of work for this committee is reproduced below:
Standardization in the field of industrial equipment and installations intended for electroheating, electromagnetic processing of materials and electroheat based treatment technologies Note: The scope of interest covers industrial installations with the use of the following equipment: – equipment for direct and indirect resistance heating; – equipment for electric resistance trace heating; – equipment for induction heating; – equipment using the effect of EM forces on materials; – equipment for arc heating, including submerged arc heating; – equipment for electroslag remelting; – equipment for plasma heating; – equipment for microwave heating; – equipment for dielectric heating; – equipment for electron beam heating; – equipment for laser heating; – equipment for infrared radiation heating. The list presents typical examples of equipment and its applications and is not exhaustive.
CLICK HERE for the link to the TC 27 Strategic Business Plan
Titles in this committee’s bibliography appears to be stable. As with all IEC titles, they are relatively narrow in scope compared with the titles promulgated by most US standards developing organizations. Our interest lies primarily in the application of this technology within and around education community buildings.
While heat tracing generally goes un-noticed it is an essential part of cold weather safety. It is wise to keep pace with its evolution with innovation in materials and controls with the lead.
We maintain this committee’s work on the standing agenda of our seasonal Snow & Ice colloquia; along with US standards developed by UL, IEEE, NEMA, NFPA, ICC, ASHRAE and a few others. We also collaborate with the IEEE Education & Healthcare Facilities Committee on this topic. See our CALENDAR for the next online meeting; open to everyone.
Issue [18-332]
Category: Electrical
Colleagues: Mike Anthony, Lorne Clark, Jim Harvey
Date & Time: Representations For Information Interchange
“A Philosopher Lecturing on the Orrery” | Joseph Wright (1766)
Most nations follow the day/month/year format (07/01/19 for January 7, 2019, for example), but the United States adheres to its own format of month/day/year (1/7/19 or 1/7/2019). The potential for misinterpreting dates across national boundaries is the logic for ISO 8601:2019 – Data Elements And Interchange Formats – Information Interchange – Representation Of Dates And Times, the ISO format for dates represents year, month, and day from the largest unit to the smallest, most specific unit of time. The ISO date format is the date format used in SQL and is the default date setting on many computers.
ISO 8601-1:2019 Date And Time – Representations For Information Interchange – Part 1: Basic Rules
CLICK ON IMAGE FOR INTERACTIVE MAP
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How the ISO Date Format Tells Today
Date and time formats used in HTML
New update alert! The 2022 update to the Trademark Assignment Dataset is now available online. Find 1.29 million trademark assignments, involving 2.28 million unique trademark properties issued by the USPTO between March 1952 and January 2023: https://t.co/njrDAbSpwB pic.twitter.com/GkAXrHoQ9T
— USPTO (@uspto) July 13, 2023
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