“Whether it’s chili with beans, barbecued beef or meatballs in marinara sauce, members of the United States military are served up a rotating menu of entrees through meals, ready to eat rations. Packed in individual pouches, these self-contained meals can be eaten during combat operations, humanitarian missions or field trainings, providing nourishment on the go. Yet while MREs were first piloted for U.S. military members during the Vietnam War, it wasn’t until the 1990s that it’s been possible for these meals to be served hot…
…We can thank a University of Cincinatti Professor of Mechanical Engineering for that.” (And transforming the civilian emergency food industry, to boot)
Ahead of the April close date for comments on the Second Draft of the 2026 revision of the NEC we examine thought trends on the following:
How does “high voltage” differ among electrotechnology professionals? Signaling and control systems workers have a much lower criteria than a merchant utility lineman than a campus bulk distribution engineer. In other words, “high voltage” is generally understood in practice and essential for worker safety. Labeling counts.
What is the origin of the apparent “confusion’ about high voltage in the IEEE, IEC, NFPA and TIA electrical safety catalogs? Is the distinction functionally acceptable — i.e. a term of art understood well enough in practice?
How can the 2026 NEC be improved for engineers, electricians and inspectors? There has been some considerable re-organization of low, medium and high voltage concepts in the 2023. It usually takes at least two NEC revision cycles for workable code to stabilize. Since education communities purchase and distribute higher voltage power on large campuses; how can power purchasing and customer distribution system best practice be improved?
The UL standards catalog is a useful starting point for electrical standards research because product safety requirements underpin much of the National Fire Protection Association catalog. Its extensive coverage of electrical equipment, components and systems reveals connections among product design, testing, certification and installation. It also provides a practical pathway to understanding the broader ANSI standards ecosystem.
“Benjamin Franklin Drawing Electricity from the Sky” 1816 Benjamin West
Benjamin Franklin conducted his famous experiment with lightning on June 10, 1752.
He used a kite and a key to demonstrate that lightning was a form of electricity.
This experiment marked an important milestone in understanding the nature of electricity
and laid the foundation for the development of lightning rods and other lightning protection systems.
Seasonal extreme weather patterns in the United States, resulting in damages to education facilities and delays in outdoor athletic events — track meets; lacrosse games, swimming pool closures and the like — inspire a revisit of the relevant standards for the systems that contribute to safety from injury and physical damage to buildings: NFPA 780 Standard for the Installation of Lightning Protection Systems
This document shall cover traditional lightning protection system installation requirements for the following: (1) Ordinary structures (2) Miscellaneous structures and special occupancies (3) Heavy-duty stacks (4) Structures containing flammable vapors, flammable gases, or liquids with flammable vapors (5) Structures housing explosive materials (6) Wind turbines (7) Watercraft (8) Airfield lighting circuits (9) Solar arrays
This document shall address lightning protection of the structure but not the equipment or installation requirements for electric generating, transmission, and distribution systems except as given in Chapter 9 and Chapter 12.
(Electric generating facilities whose primary purpose is to generate electric power are excluded from this standard with regard to generation, transmission, and distribution of power. Most electrical utilities have standards covering the protection of their facilities and equipment. Installations not directly related to those areas and structures housing such installations can be protected against lightning by the provisions of this standard.)
This document shall not cover lightning protection system installation requirements for early streamer emission systems or charge dissipation systems.
“Down conductors” must be at least #2 AWG copper (0 AWG aluminum) for Class I materials in structures less than 75-ft in height
“Down conductors: must be at least 00 AWG copper (0000 AWG aluminum) for Class II Materials in structures greater than 75-ft in height.
Related grounding and bonding requirements appears in Chapters 2 and Chapter 3 of NFPA 70 National Electrical Code. This standard does not establish evacuation criteria.
University of Michigan | Washtenaw County (Photo by Kai Petainen)
The current edition is dated 2023 and, from the transcripts, you can observe concern about solar power and early emission streamer technologies tracking through the committee decision making. Education communities have significant activity in wide-open spaces; hence our attention to technical specifics.
Public input on the 2026 revision is receivable until 1 June 2023.
We always encourage our colleagues to key in their own ideas into the NFPA public input facility (CLICK HERE). We maintain NFPA 780 on our Power colloquia which collaborates with IEEE four times monthly in European and American time zones. See our CALENDAR for the next online meeting; open to everyone.
Lightning flash density – 12 hourly averages over the year (NASA OTD/LIS) This shows that lightning is much more frequent in summer than in winter, and from noon to midnight compared to midnight to noon.
Issue: [14-105]
Category: Electrical, Telecommunication, Public Safety, Risk Management
Colleagues: Mike Anthony, Jim Harvey, Kane Howard
Didn't really plan for all possibilities, did they. 🤓
Churches and chapels are more susceptible to lightning damage due to their height and design. Consider:
Height: Taller structures are more likely to be struck by lightning because they are closer to the cloud base where lightning originates.
Location: If a church or chapel is situated in an area with frequent thunderstorms, it will have a higher likelihood of being struck by lightning.
Construction Materials: The materials used in the construction of the building can affect its vulnerability. Metal structures, for instance, can conduct lightning strikes more readily than non-metallic materials.
Proximity to Other Structures: If the church or chapel is located near other taller structures like trees, utility poles, or buildings, it could increase the chances of lightning seeking a path through these objects before reaching the building.
Lightning Protection Systems: Installing lightning rods and other lightning protection systems can help to divert lightning strikes away from the structure, reducing the risk of damage.
Maintenance: Regular maintenance of lightning protection systems is essential to ensure their effectiveness. Neglecting maintenance could result in increased susceptibility to lightning damage.
Historical Significance: Older buildings might lack modern lightning protection systems, making them more vulnerable to lightning strikes.
The risk can be mitigated by proper design, installation of lightning protection systems, and regular maintenance.
We are curating this post — which appears every day — thus its spareness. Much of the content — dating back five years — will be archived. We will roll out updates over the next few weeks.
Proposals will be received until January 12, 2027. That gives ICC Group A proponents just over ten weeks to prepare and submit code change proposals, including the Thanksgiving, Christmas and New Year holidays. Those among us who have participated in the International Code Council Standards Development process are familiar with its jankiness in recent years. We will be adjusting our topical coverage on our CALENDAR in the days and weeks ahead.
Electrical grounding is vital for safety and system protection. It provides a path for excess electrical current to safely dissipate into the earth, reducing the risk of electric shock, fire, and equipment damage. Grounding stabilizes voltage levels, ensuring the proper operation of electrical systems and devices. It also protects against electrical surges and lightning strikes by diverting harmful currents away from sensitive components. Overall, grounding enhances the safety, reliability, and performance of electrical installations, making it a fundamental practice in electrical engineering and construction.
In other words, without grounding, electric energy does no useful work. Today we review the grounding principles for exterior lightning protection and building interior telecommunication and audio-visual systems. Use the login credentials at the upper right our home page.
“Railroad Sunset” | Edward Hopper
Grounding protects buildings from lightning by providing a safe path for the immense electrical energy of a lightning strike to travel into the earth, thereby minimizing damage. Here’s how it works:
Lightning Rods: Metal rods placed on top of buildings intercept lightning strikes. These rods are connected to a network of conductors.
Conductors: These metal cables or strips carry the electrical charge from the lightning rod to the ground.
Grounding System: The conductors are connected to grounding rods buried deep in the earth, dispersing the electrical charge safely into the ground.
This system prevents lightning from passing through the building’s structure, reducing the risk of fire, structural damage, and electrical hazards.
“Rain in Charleston” 1951 Thomas Fransioli
Grounding in telecommunication systems is crucial for ensuring safety and operational reliability. Here’s how it works:
Surge Protection: Grounding helps protect telecommunication equipment from voltage surges caused by lightning strikes, power line faults, or switching operations. By providing a direct path to the earth, grounding allows excess electrical energy to be safely dissipated, preventing damage to sensitive equipment.
Electromagnetic Interference (EMI) Reduction: Proper grounding minimizes EMI, which can disrupt communication signals. By creating a common reference point for electrical potentials, grounding reduces noise and interference, ensuring clearer and more reliable signal transmission.
Safety: Grounding protects personnel from electrical shocks by ensuring that any fault currents are directed away from equipment and safely into the ground. This is particularly important in environments with high-power transmission equipment.
System Stability: Grounding stabilizes voltage levels within the system, preventing fluctuations that could cause equipment malfunctions or failures. This stability is crucial for maintaining consistent and reliable telecommunications services.
Overall, grounding enhances the safety, performance, and reliability of telecommunication systems by managing electrical faults, reducing interference, and protecting both equipment and personnel.
“Telegraph Poles with Buildings” | Joseph Stella (1917)
Grounding in audio systems is essential for ensuring high-quality sound output and preventing various types of electrical noise and interference. Here’s how it works:
Noise Reduction: Proper grounding minimizes hums and buzzes often caused by ground loops, which occur when different pieces of equipment are grounded at different points. By ensuring a common ground point, the potential differences that cause these loops are eliminated, leading to cleaner audio signals.
Shielding: Grounding provides a reference point for the shielding in audio cables, which helps to block external electromagnetic interference (EMI) and radio frequency interference (RFI). This shielding prevents unwanted noise from being introduced into the audio signal.
Safety: Grounding protects both the equipment and users from electrical shocks. In the event of a fault, the grounding system directs the fault current safely to the earth, reducing the risk of electric shock and equipment damage.
Signal Integrity: By maintaining a consistent ground potential, grounding helps preserve the integrity of audio signals. This ensures that the signals are transmitted and received accurately without degradation, resulting in better sound quality.
Equipment Protection: Proper grounding can protect sensitive audio equipment from power surges and static discharge, extending the lifespan and reliability of the components.
Overall, grounding is a fundamental practice in audio systems to ensure high-quality sound, protect equipment, and maintain safety for users.
These are generally downloads. We are happy to pick through the changes to the Electrical stack depending upon interest.
Left Panel Of George Julian Zolnay’s Allegorical “Academic, Business & Manual Education” Granite Frieze At Francis L. Cardozo High School (Washington, DC)
All fifty United States have their own “signature” disaster with which to reckon; some more than others. California has earthquakes, Florida has hurricanes, Missouri has floods; and so on, Life and property loss are preventable; but losses will persist because technical solutions notwithstanding, culture determines human behavior. It is impossible to be alive and safe.
FM Global is one of several organizations that curate privately developed consensus products that set the standard of care for many industries; education communities among them. These standards contribute to the reduction in the risk of property loss due to fire, weather conditions, and failure of electrical or mechanical equipment. They incorporate nearly 200 years of property loss experience, research and engineering results, as well as input from consensus standards committees, equipment manufacturers and others.
If you want FMGlobal as your insurance carrier, or to supplement your organization’s self-insurance program, then you will likely be assigned an FMGlobal conformity professional.
A scan of its list data sheets indicate a number of noteworthy updates of documents establishing minimum requirements for safety technologies common in education facilities:
Note that the bulk of the safety concepts in the foregoing titles incorporate by reference the safety concepts that cross our radar every day FM Global provides direct access to the full span of its documents at this link:
To respond to calls for public consultation you will need to set up (free) access credentials.
We keep FMGlobal titles — and the literature of other property insurers involved in standards setting — on the standing agenda of our Risk, Snow and Prometheus colloquia. See our CALENDAR for the next meeting.
“Neither party shall be liable for any failure or delay in performance of its obligations under this agreement due to events beyond its reasonable control, including but not limited to acts of God, war, terrorism, civil commotion, labor strikes, and natural disasters. The affected party shall promptly notify the other party of the force majeure event and take reasonable steps to mitigate its impact on performance. During the continuance of such events, the obligations of the affected party shall be suspended, and the time for performance shall be extended.”
Example 2: Detailed Force Majeure Clause
“In the event that either party is unable to perform its obligations under this agreement due to a force majeure event, the affected party shall promptly notify the other party in writing, specifying the nature and anticipated duration of the force majeure event. Force majeure events shall include, but are not limited to, acts of God, strikes, lockouts, government action or inaction, war, terrorism, epidemics, and natural disasters. The affected party shall use reasonable efforts to overcome or mitigate the effects of the force majeure event. If the force majeure event continues for a period of [specified duration], either party may terminate this agreement by providing written notice to the other party.”
We examine the proposals for the 2028 National Electrical Safety Code; including our own. The 2026 National Electrical Code where sit on CMP-15 overseeing health care facility electrical issues should be released any day now. We have one proposal on the agenda of the International Code Council’s Group B Committee Action Hearings in Cleveland in October. Balloting on the next IEEE Gold Book on reliability should begin.
FERC Open Meetings | (Note that these ~60 minute sessions meet Sunshine Act requirements. Our interest lies one or two levels deeper into the technicals underlying the administrivia)
Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei City, Taiwan
First Draft Proposals contain most of our proposals — and most new (original) content. We will keep the transcripts linked below but will migrate them to a new page starting 2025:
N.B. We are in the process of migrating electric power system research to the Institute of Electrical and Electronics Engineers bibliographic format.
Recap of the May meetings of the Industrial & Commercial Power Systems Conference in Las Vegas. The conference ended the day before the beginning of the 3-day Memorial Day weekend in the United States so we’re pressed for time; given all that happened.
We can use our last meeting’s agenda to refresh the status of the issues.
We typically break down our discussion into the topics listed below:
Codes & Standards:
While IAS/I&CPS has directed votes on the NEC; Mike is the only I&CPS member who is actually submitting proposals and responses to codes and standards developers to the more dominant SDO’s — International Code Council, ASHRAE International, UL, ASTM International, IEC & ISO. Mike maintains his offer to train the next generation of “code writers and vote getters”
Performance-based building premises feeder design has been proposed for the better part of ten NEC revision cycles. The objective of these proposals is to reduce material, labor and energy waste owed to the branch and feeder sizing rules that are prescriptive in Articles 210-235. Our work in service and lighting branch circuit design has been largely successful. A great deal of building interior power chain involves feeders — the network upstream from branch circuit panels but down stream from building service panel.
Our history of advocating for developing this approach, inspired by the NFPA 101 Guide to Alternative Approaches to Life Safety, and recounted in recent proposals for installing performance-based electrical feeder design into the International Building Code, appears in the link below:
Access to this draft paper for presentation at any conference that will receive it — NFPA, ICC or IEEE (or even ASHRAE) will be available for review at the link below:
NFPA 110 Definitions of Public Utility v. Merchant Utility
NFPA 72 “Definition of Dormitory Suite” and related proposals
Buildings:
Renovation economics, Smart contracts in electrical construction. UMich leadership in aluminum wiring statements in the NEC should be used to reduce wiring costs.
This paper details primary considerations in estimating the life cycle of a campus medium voltage distribution grid. Some colleges and universities are selling their entire power grid to private companies. Mike has been following these transactions but cannot do it alone.
Variable Architecture Multi-Island Microgrids
District energy:
Generator stator winding failures and implications upon insurance premiums. David Shipp and Sergio Panetta. Mike suggests more coverage of retro-fit and lapsed life cycle technicals for insurance companies setting premiums.
Reliability:
Bob Arno’s leadership in updating the Gold Book.
Mike will expand the sample set in Table 10-35, page 293 from the <75 data points in the 1975 survey to >1000 data points. Bob will set up meeting with Peyton at US Army Corps of Engineers.
Reliability of merchant utility distribution systems remains pretty much a local matter. The 2023 Edition of the NESC shows modest improvement in the vocabulary of reliability concepts. For the 2028 Edition Mike submitted several proposals to at least reference IEEE titles in the distribution reliability domain. It seems odd (at least to Mike) that the NESC committees do not even reference IEEE technical literature such as Bob’s Gold Book which has been active for decades. Mike will continue to propose changes in other standards catalogs — such as ASTM, ASHRAE and ICC — which may be more responsive to best practice assertions. Ultimately, improvements will require state public utility commission regulations — and we support increases in tariffs so that utilities can afford these improvements.
Mike needs help from IEEE Piscataway on standard WordPress theme limitations for the data collection platform.
Mike will update the campus power outage database.
Healthcare:
Giuseppe Parise’s recent work in Italian power grid to its hospitals, given its elevated earthquake risk. Mike’s review of Giuseppe’s paper:
Mike and David Shipp will prepare a position paper for the Harvard Healthcare Management Journal on reliability advantages of impedance grounding for the larger systems.
The Internet of Bodies
Forensics:
Giuseppe’s session was noteworthy for illuminating the similarity and differences between the Italian and US legal system in handling electrotechnology issues.
Mike will restock the committee’s library of lawsuits transactions.
Ports:
Giuseppe updates on the energy and security issues of international ports. Mike limits his time in this committee even though the State of Michigan has the most fresh water international ports in the world.
A PROPOSED GUIDE FOR THE ENERGY PLAN AND ELECTRICAL INFRASTRUCTURE OF A PORT
Other:
Proposals to the 2028 National Electrical Safety Code: Accepted Best Practice, exterior switchgear guarding, scope expansion into ICC and ASHRAE catalog,
Apparently both the Dot Standards and the Color Books will continue parallel development. Only the Gold Book is being updated; led by Bob Arno. Mike admitted confusion but reminded everyone that any references to IEEE best practice literature in the NFPA catalog, was installed Mike himself (who would like some backup help)
Mike assured Christel Hunter (General Cable) that his proposals for reducing the 180 VA per-outlet requirements, and the performance-base design allowance for building interior feeders do not violate the results of the Neher-McGrath calculation used for conductor sizing. All insulation and conducting material thermal limits are unaffected.
Other informal discussions centered on the rising cost of copper wiring and the implications for the global electrotechnical transformation involving the build out of quantum computing and autonomous vehicles. Few expressed optimism that government ambitions for the same could be met in any practical way.
Are students avoiding use of Chat GPT for energy conservation reasons? Mike will be breaking out this topic for a dedicated standards inquiry session:
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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/njrDAbSpwBpic.twitter.com/GkAXrHoQ9T
_-_Benjamin_Franklin_Drawing_Electricity_from_the_Sky_-_Google_Art_Project.jpg)
