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Wolverine Village
Something for the Suggestion Box: None of these four distinguished Michigan graduates have a University of Michigan campus building bearing his name:
Thomas Weller (Nobel Laureate)
Frank Murphy (US Supreme Court Justice)
Kelly Johnson (Aeronautical Engineer of World War II aircraft),
Claude Shannon (Pioneer of Superintelligence now transforming the world)
Eunice Royster Harper worked at the University of Michigan for 41 years, retiring as Vice-President of Student Affairs.
Regents Communication: Naming Approval
* Eunice Royster Harper’s Ed.D., University of Pennsylvania (degree attested by U-M; year, program and doctoral work not yet identified).
NGO, QUANGO or Something Else: How Harvard and Other Colleges Manage Their Endowments
Bill Ackman: Anti-Semitism at Harvard
Harvard Black Students Association: “Harvard is ‘Ours’ Now”
Dr. Claudine Gay Doctoral Dissertation
“Taking charge: Black electoral success and the redefinition of American politics”
- In Challenging Year, Higher Education Endowments See Declines in Returns and Values but Boost Overall Spending, NACUBO-TIAA Study Finds
- NACUBO 2023: Commonfund Study of Endowments
- Harvard University Financial Administration Report: June 30, 2023
Related:
Direct Current Distribution
Direct Current Buildings and Smart Grid
Today at the usual hour we examine the case studies undertaken by Department of Energy to explore the feasibility of buildings powered by entirely by direct current. Use the login credentials at the upper right of our home page.
Energy Design and Scoping Tool for DC Distribution Systems
DC POWER FOR BUILDINGS | CORE STANDARDS
IEC 60364 — Low-Voltage Electrical Installations
IEC 60364-1 — Fundamental Principles, Assessment of General Characteristics, Definitions
IEC 60364-5-52 — Selection and Erection of Electrical Equipment | Wiring Systems
IEC 60364-5-53 — Protection, Isolation, Switching, Control and Monitoring
IEC 60364-5-54 — Earthing Arrangements and Protective Conductors
IEC 60364-5-55 — Other Equipment | Generating Sets and Related Equipment
IEC 60364-8-82 — Prosumer’s Low-Voltage Electrical Installations
NFPA 70 — National Electrical Code
Article 250 — Grounding and Bonding
Article 690 — Solar Photovoltaic Systems
Article 705 — Interconnected Electric Power Production Sources
Article 706 — Energy Storage Systems
Article 712 — Direct Current Microgrids
Article 720 — Circuits and Equipment Operating at Less Than 50 Volts
Power-Limited Circuits
Today at the usual hour we review best practice literature for the design, construction and operation of Power-Limited Circuits in healthcare facilities. With our previous tenure on Code Panel 15 of the National Electrical Code (which covers healthcare facilities, primarily) and our recent appointment by IEEE to Code Panel 3 (which covers power limited circuits in all occupancy classes) we set ourselves up to respond to the proposals that will shape the 2029 NEC. Use the login credentials at the upper right of our home page.
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If one imagines that three-phase hospital power distribution systems as “arteries” then power limited circuits can be imagined as the “capillaries” that drive hundreds of end use clinical equipment and devices. The analogy captures the hierarchical, physiological structure of hospital electrical systems—much like the human circulatory system—where power flows from high-capacity trunks to precision, low-risk endpoints.
Three-Phase Systems: The Arteries and Veins
Three-phase hospital power distribution systems function as the arteries and veins: they are the robust, high-volume “vascular” network. Incoming utility power (or on-site generators) arrives as three-phase medium voltage, stepped down through transformers and switchgear into the Essential Electrical System (EES). This backbone—normal power, life-safety, critical, and equipment branches—delivers bulk kilowatts across the facility to major loads: HVAC, lighting, elevators, imaging suites, and operating-room receptacles. Like arteries, these feeders carry large currents over long distances with minimal loss; like veins, they return current safely while maintaining redundancy and selective coordination to keep the “body” (hospital) alive during outages.
Power-Limited Circuits: The Capillaries
Power-limited circuits (NEC Article 725/724 Class 2 and Class 3) are the capillaries. They are the countless, tiny, energy-restricted final branches that directly “perfuse” end-use clinical devices. These circuits are deliberately power-limited—typically ≤30 V and ≤100 VA—to prevent fire, shock, or interference in patient-care spaces. They supply nurse-call systems, bedside monitors, infusion-pump controls, alarm signaling, data links, and low-voltage sensors. Just as capillaries exchange oxygen and nutrients cell-by-cell without flooding tissue, power-limited circuits deliver only the precise, safe wattage needed by sensitive electronics while isolating them from the high-energy main distribution. Their thin insulation, separation rules, and inherent current-limiting transformers mirror the delicate walls of capillaries.
The comparison illuminates why hospitals cannot rely solely on heavy three-phase feeders: without these microscopic “capillaries,” clinical devices would either lack power or be exposed to dangerous fault energies. The analogy shows how the entire system maintains life—bulk transport for infrastructure, micro-delivery for patient care—while enforcing safety through progressive limitation. In essence, the capillaries make the circulatory system functional at the point of use.
Hegemon Cuyahoga & County Dublin
Financial Presentations & Webcasts
First Quarter 2026 Earnings Release | May 5, 2026
Here we shift our perspective 120 degrees to understand the point of view of the Producer interest in the American national standards system (See ANSI Essential Requirements). The title of this post draws from the location of US and European headquarters. We list proposals by a successful electrical manufacturer for discussion during today’s colloquium:
2026 National Electrical Code
CMP-1: short circuit current ratings, connections with copper cladded aluminum conductors, maintenance to be provided by OEM, field markings
CMP-2: reconditioned equipment, receptacles in accessory buildings, GFCI & AFCI protection, outlet placement generally, outlets for outdoor HVAC equipment(1)
(1) Here we would argue that if a pad mount HVAC unit needs service with tools that need AC power once every 5-10 years then the dedicated branch circuit is not needed. Many campuses have on-site, full-time staff that can service outdoor pad mounted HVAC equipment without needing a nearby outlet. One crew — two electricians — will run about $2500 per day to do anything on campus.
CMP-3: No proposals
CMP-4: solar voltaic systems (1)
(1) Seems reasonable – spillover outdoor night time lighting effect upon solar panel charging should be identified.
CMP-5: Administrative changes only
CMP-6: No proposals
CMP-7: Distinction between “repair” and “servicing”
CMP-8: Reconditioned equipment
CMP-9: Reconditioned equipment
CMP-10: Short circuit ratings, service disconnect, disconnect for meters, transformer secondary conductor, secondary conductor taps, surge protective devices, disconnecting means generally, spliced and tap conductors, more metering safety, 1200 ampere threshold for arc reduction technology, reconditioned surge equipment shall not be permitted, switchboard short circuit ratings
CMP-11: Lorem
CMP-12: Lorem
CMP-13: Lorem
Lorem ipsum
2029 National Electrical Code
Public input on the 2029 Revision will be received until April 9th. Over the next weeks and months — typically meeting twice a day every Tuesday — we will pull forward our previous proposals and draft original proposals relevant to the education and healthcare electrotechnical infrastructure of educational settlements. Link to Proposed Reorganization.
NFPA 70 2029 Revision Mike Anthony IEEE and Standards Michigan public input April 2026
Photo at 2723 State Street Office*
Mike was part of the National Electrical Code Quarter Century Club but was at another conference and not able to receive the award at the June conference. University of Michigan support began in 1993. IEEE support began in 2014.
*New Office (a short walk across the street) starting October 1: 455 East Eisenhower, Ann Arbor, MI 48108
Current Issues and Recent Research
Today we examine Second Draft transcripts of the Special Equipment Chapter 6 (CMP-12) and product inspection, testing and certification listings that appear Annex A (CMP-1).
Once every eighteen months we spend a week drilling into the National Electrical Code by submitting new proposals or comments on proposed revisions. Today we review the actions taken by the technical committees on the First Draft. Responses to committee actions will be received until August 26th.
Interconnected Electric Power Production Sources “Microgrids”
Progress Sentinels
We collect a sample of cameras that follow construction from start to finish. Fixed on rooftops, poles, or nearby buildings, they record the work as it unfolds—foundations poured, steel raised, façades closed in, interiors finished. They do not interrupt the site. They simply keep a clear, continuous record.
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Their role is practical: project teams check daily conditions, facilities staff document milestones, and the campus community can see a building take shape over months that would otherwise pass unseen. Time-lapse footage turns a long construction schedule into a fun, brief story of how a new building joins the campus.
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Roast Beef Dinner
Cooking on a Budget: Learn how to make a flavourful dish for less than £1.70
Food Standards Agency UK: Meat and slaughter
Trump’s children all turned out so well
Welcome back to a new academic year! 🤗
We’re thrilled to see staff and students back on campus and ready for another exciting term. Who’s ready to get started? ✨ pic.twitter.com/cvf9TQhYU8
— University of Southampton (@unisouthampton) September 30, 2024
print(“Python”)
“Python is the programming equivalent
of a Swiss Army Knife.”
— Some guy
Open source standards development is characterized by very open exchange, collaborative participation, rapid prototyping, transparency and meritocracy. The Python programming language is a high-level, interpreted language that is widely used for general-purpose programming. Python is known for its readability, simplicity, and ease of use, making it a popular choice for beginners and experienced developers alike. Python has a large and active community of developers, which has led to the creation of a vast ecosystem of libraries, frameworks, and tools that can be used for a wide range of applications. These include web development, scientific computing, data analysis, machine learning, and more.
Another important aspect of Python is its versatility. It can be used on a wide range of platforms, including Windows, macOS, Linux, and even mobile devices. Python is also compatible with many other programming languages and can be integrated with other tools and technologies, making it a powerful tool for software development. Overall, the simplicity, readability, versatility, and large community support of Python make it a valuable programming language to learn for anyone interested in software development including building automation.
As open source software, anyone may suggest an improvement to Python(3.X) starting at the link below:
Python can be used to control building automation systems. Building automation systems are typically used to control various systems within a building, such as heating, ventilation, air conditioning, lighting, security, and more. Python can be used to control these systems by interacting with the control systems through the building’s network or other interfaces.
There are several Python libraries available that can be used for building automation, including PyVISA, which is used to communicate with instrumentation and control systems, and PyModbus, which is used to communicate with Modbus devices commonly used in building automation systems. Python can also be used to develop custom applications and scripts to automate building systems, such as scheduling temperature setpoints, turning on and off lights, and adjusting ventilation systems based on occupancy or other variables. Overall, Python’s flexibility and versatility make it well-suited for use in building automation systems.
.@PyCon US 2025 is a wrap, and our hearts are full with #Python community love! Thanks to every single one of you who organized, volunteered, attended, & sponsored 🐍🫶 #PyConUS
The PSF office will be closed May 26-28 so our staff can rest & recover. See you back online soon! pic.twitter.com/Sy1hiRmvw4
— Python Software Foundation (@ThePSF) May 27, 2025
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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