The American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) is an ANSI-accredited continuous-maintenance standards developer (a major contributor to what we call a regulatory product development “stream”). Continuous maintenance means that changes to titles in its catalog can change in as little as 30-45 days. This is meaningful to jurisdictions that require conformance to the “latest” version of ASHRAE 90.1
Among the leading titles in its catalog is ASHRAE 90.1 Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings. Standard 90.1 has been a benchmark for commercial building energy codes in the United States and a key basis for codes and standards around the world for more than 35 years. Free access to ASHRAE 90.1 version is available at the link below:
Chapter 9: Lighting, begins on Page 148, and therein lie the tables that are the most widely used metrics (lighting power densities) by electrical and illumination engineers for specifying luminaires and getting them wired and controlled “per code”. Many jurisdictions provide access to this Chapter without charge. Respecting ASHRAE’s copyright, we will not do so here but will use them during today’s Illumination Colloquium, 16:00 UTC.
Keep in mind that recently ASHRAE expanded the scope of 90.1 to include energy usage in the spaces between buildings:
Education industry facility managers, energy conservation workgroups, sustainability officers, electric shop foreman, electricians and front-line maintenance professionals who change lighting fixtures, maintain environmental air systems are encouraged to participate directly in the ASHRAE consensus standard development process.
Univerzita Karlova
We also maintain ASHRAE best practice titles as standing items on our Mechanical, Water, Energy and Illumination colloquia. See our CALENDAR for the next online meeting; open to everyone.
Issue: [Various]
Category: Mechanical, Electrical, Energy Conservation, Facility Asset Management, US Department of Energy, #SmartCampus
Colleagues: Mike Anthony, Larry Spielvogel, Richard Robben
N.B. We are knocking on ASHRAE’s door to accept proposals for reducing building interior power chain energy and material waste that we cannot persuade National Electrical Code committee to include in the 2026 revision of the National Electrical Code.
“…The solar panels will populate the gothic chapel roof, producing an approximate 105,000 kWh of energy a year – enough to run the chapel’s electricity, and saving around £20,000 in energy bills per year. The college confirmed that any excess energy would be sold off to the national grid.
Solar panels perform better when listening to music:
A 2013 study by researchers at Imperial College London and Queen Mary University of London showed that solar panels actually work better when exposed to music, of multiple genres. Scientists at the university proved that when exposed to high pitched sounds, like those found in rock and pop music, the solar cells’ power output increased by up to 40 percent. Classical music was also found to increase the solar cells’ energy production, but slightly less so than rock and pop, as it generally plays at a lower pitch than pop and rock. Whether they know it or not, British band Coldplay are just one of the artists benefitting from this research. During their 2021 tour, they installed solar photovoltaic panels in the build-up to each show, “behind the stage, around the stadium and where possible in the outer concourses”…
To determine how much electrical power and lighting 12 kilowatts (kW) will provide for an educational facility, we need to consider the following factors:
Power Distribution: How the 12 kW will be distributed across different electrical needs such as lighting, computers, HVAC (heating, ventilation, and air conditioning), and other equipment.
Lighting Requirements: The specific lighting requirements per square foot or room, which can vary based on the type of facility (classrooms, libraries, laboratories, etc.).
Efficiency of Lighting: The type of lighting used (e.g., LED, fluorescent, incandescent) as this affects the power consumption and lighting output.
We start with lighting.
Lighting Efficiency:
LED lights are highly efficient, typically around 100 lumens per watt.
Fluorescent lights are less efficient, around 60-70 lumens per watt.
Lighting Power Calculation:
12 kW (12,000 watts) of LED lighting at 100 lumens per watt would provide: 12,000 watts×100 lumens/watt=1,200,000 lumens
Illumination Requirements:
Classroom: Approximately 300-500 lux (lumens per square meter).
Library or laboratory: Approximately 500-750 lux.
Area Coverage:
If we target 500 lux (which is 500 lumens per square meter), we can calculate the area covered by the lighting: (1,200,000 lumens)/ 500 lux=2,400 square meters
Now we need to allocate power to other loads.
Lighting: Assuming 50% of the 12 kW goes to lighting:
Lighting Power: 6 kW (6,000 watts)
Using the previous calculation: 6,000 watts×100 lumens/watt=600,000 lumens
Area Coverage for lighting (at 500 lux): (600,000 lumens)/500 lux=1,200 square meters
Other Electrical Needs:
Computers and equipment: Typically, a computer lab might use around 100 watts per computer.
HVAC: This can vary widely, but let’s assume 4 kW is allocated for HVAC and other systems.
Breakdown:
Lighting: 6 kW
Computers/Equipment: 2 kW (e.g., 20 computers at 100 watts each)
HVAC and other systems: 4 kW
Summary
Lighting: 12 kW can provide efficient LED lighting for approximately 1,200 square meters at 500 lux.
General Use: When distributed, 12 kW can cover lighting, a computer lab with 20 computers, and basic HVAC needs for a small to medium-sized educational facility.
The exact capacity will vary based on specific facility needs and equipment efficiency.
Should every campus building generate its own power? Sustainability workgroups are vulnerable to speculative hype about net-zero buildings and microgrids. We remind sustainability trendsniffers that the central feature of a distributed energy resource–the eyesore known as the university steam plant–delivers most of the economic benefit of a microgrid. [Comments on Second Draft due April 29th] #StandardsMassachusetts
“M. van Marum. Tweede vervolg der proefneemingen gedaan met Teyler’s electrizeer-machine, 1795” | An early energy storage device | Massachusetts Institute of Technology Libraries
We have been following the developmental trajectory of a new NFPA regulatory product — NFPA 855 Standard for the Installation of Stationary Energy Storage Systems — a document with ambitions to formalize the fire safety landscape of the central feature of campus microgrids by setting criteria for minimizing the hazards associated with energy storage systems.
The fire safety of electric vehicles and the companion storage units for solar and wind power systems has been elevated in recent years with incidents with high public visibility. The education industry needs to contribute ideas and data to what we call the emergent #SmartCampus;an electrotechnical transformation — both as a provider of new knowledge and as a user of the new knowledge.
Transcripts of technical deliberation are linked below:
Comment on the 2026 revision received by March 27, 2025 will be heard at the NFPA June 2025 Expo through NFPA’s NITMAM process.
University of Michigan | Average daily electrical load across all Ann Arbor campuses is on the order of 100 megawatts
A fair question to ask: “How is NFPA 855 going to establish the standard of care any better than the standard of care discovered and promulgated in the NFPA 70-series and the often-paired documents NFPA 110 and NFPA 111?” (As you read the transcript of the proceedings you can see the committee tip-toeing around prospective overlaps and conflicts; never a first choice).
Suffice to say, the NFPA Standards Council has due process requirements for new committee projects and, obviously, that criteria has been met. Market demand presents an opportunity to assemble a new committee with fresh, with new voices funded by a fresh set of stakeholders who, because they are more accustomed to advocacy in open-source and consortia standards development platforms, might have not been involved in the more rigorous standards development processes of ANSI accredited standards developing organizations — specifically the NFPA, whose members are usually found at the top of organization charts in state and local jurisdictions. For example we find UBER — the ride sharing company — on the technical committee. We find another voice from Tesla Motors. These companies are centered in an industry that does not have the tradition of leading practice discovery and promulgation that the building industry has had for the better part of two hundred years.
Our interest in this standard lies on both sides of the education industry — i.e. the academic research side and the business side. For all practical purposes, the most credible, multi-dimensional and effective voice for lowering #TotalCostofOwnership for the emergent smart campus is found in the tenure of Standards Michigan and its collaboration with IEEE Education & Healthcare Facilities Committee (E&H). You may join us sorting through the technical, economic and legal particulars and day at 11 AM Eastern time. The IEEE E&H Committee meets online every other Tuesday in European and American time zones; the next meeting on March 26th. All meetings are open to the public.
University of California San Diego Microgrid
You are encouraged to communicate directly with Brian O’Connor, the NFPA Staff Liaison for specific questions. We have some of the answers but Brian is likely to have all of them. CLICK HERE for the NFPA Directory. Additionally, NFPA will be hosting its Annual Conference & Expo, June 17-20 in San Antonio, Texas; usually an auspicious time for meeting NFPA staff working on this, and other projects.
The prospect of installing of energy storage technologies at every campus building — or groups of buildings, or in regions — is clearly transformational if the education facilities industry somehow manages to find a way to drive the cost of operating and maintaining many energy storage technologies lower than the cost of operating and maintaining a single campus distributed energy resource. The education facility industry will have to train a new cadre of microgrid technology specialists who must be comfortable working at ampere and voltage ranges on both sides of the decimal point that separates power engineers from control engineers. And, of course, dynamic utility pricing (set by state regulatory agencies) will continue to be the most significant independent control variable.
Finding a way to make all this hang together is the legitimate work of the academic research side of the university. We find that sustainability workgroups (and elected governing bodies) in the education industry are vulnerable to out-sized claims about microgrids and distributed energy resources; both trendy terms of art for the electrotechnical transformation we call the emergent #SmartCampus.
We remind sustainability trendsniffers that the central feature of a distributed energy resource — the eyesore known as the university steam plant — bears most of the characteristics of a microgrid. In the videoclip linked below a respected voice from Ohio State University provides enlightenment on this point; even as he contributes to the discovery stream with a study unit.
Ohio State University McCracken Power Plant
Issue: [16-131]
Category: District Energy, Electrical, Energy, Facility Asset Management, Fire Safety, Risk Management, #SmartCampus, US Department of Energy
Colleagues: Mike Anthony, Bill Cantor (wcantor@ieee.org). Mahesh Illindala
The standards for delaying outdoor sports due to lightning are typically set by governing bodies such as sports leagues, associations, or organizations, as well as local weather authorities. These standards may vary depending on the specific sport, location, and level of play. However, some common guidelines for delaying outdoor sports due to lightning include:
Lightning Detection Systems: Many sports facilities are equipped with lightning detection systems that can track lightning activity in the area. These systems use sensors to detect lightning strikes and provide real-time information on the proximity and severity of the lightning threat. When lightning is detected within a certain radius of the sports facility, it can trigger a delay or suspension of outdoor sports activities.
Lightning Distance and Time Rules: A common rule of thumb used in outdoor sports is the “30-30” rule, which states that if the time between seeing lightning and hearing thunder is less than 30 seconds, outdoor activities should be suspended, and participants should seek shelter. The idea is that lightning can strike even when it is not raining, and thunder can indicate the proximity of lightning. Once the thunder is heard within 30 seconds of seeing lightning, the delay or suspension should be implemented.
Local Weather Authority Guidelines: Local weather authorities, such as the National Weather Service in the United States, may issue severe weather warnings that include lightning information. Sports organizations may follow these guidelines and suspend outdoor sports activities when severe weather warnings, including lightning, are issued for the area.
Sports-Specific Guidelines: Some sports may have specific guidelines for lightning delays or suspensions. For example, golf often follows a “Play Suspended” policy, where play is halted immediately when a siren or horn is sounded, and players are required to leave the course and seek shelter. Other sports may have specific rules regarding how long a delay should last, how players should be informed, and when play can resume.
It’s important to note that safety should always be the top priority when it comes to lightning and outdoor sports. Following established guidelines and seeking shelter when lightning is detected or severe weather warnings are issued can help protect participants from the dangers of lightning strikes.
Noteworthy: NFPA titles such as NFPA 780 and NFPA 70 Article 242 deal largely with wiring safety, informed by assuring a low-resistance path to earth (ground)
There are various lightning detection and monitoring devices available on the market that can help you stay safe during thunderstorms. Some of these devices can track the distance of lightning strikes and alert you when lightning is detected within a certain radius of your location. Some devices can also provide real-time updates on lightning strikes in your area, allowing you to make informed decisions about when to seek shelter.
Examples of such devices include personal lightning detectors, lightning alert systems, and weather stations that have lightning detection capabilities. It is important to note that these devices should not be solely relied upon for lightning safety and should be used in conjunction with other safety measures, such as seeking shelter indoors and avoiding open areas during thunderstorms.
Artificial lighting was first introduced to theater dramatic performance stages in the 17th century. The use of candles and oil lamps initially provided a means to illuminate the stage, allowing performances to take place in the evening and enhancing the visibility for both actors and the audience. Before this development, theatrical performances were typically held during daylight hours due to the reliance on natural light.
In the early 17th century, theaters in England began experimenting with various lighting techniques. Thomas Killigrew’s Theatre Royal, Drury Lane, in London, is often credited as one of the first theaters to use artificial lighting. The use of candles and later oil lamps evolved over time, leading to more sophisticated lighting setups as technology advanced.
The 18th and 19th centuries saw further innovations in stage lighting, including the use of gas lamps. Eventually, the introduction of electric lighting in the late 19th and early 20th centuries revolutionized stage lighting, providing theaters with a more reliable and controllable source of illumination. This allowed for greater creativity in the design and execution of lighting effects, contributing significantly to the overall theatrical experience.
Today at 16:00 UTC we review best practice for engineering and installing the point of common coupling between an electrical service provider its and an purchasing — under the purview of NEC CMP-10.
Use the login credentials at the upper right of our home page.
The relevant passages of the National Electrical Code are found in Article 230 and Article 495. We calibrate our attention with the documents linked below. These are only representative guidelines:
We are in the process of preparing new (original, and sometimes recycled) proposals for the 2026 National Electrical Code, with the work of Code Panel 10 of particular relevance to today’s topic:
First Draft Meetings: January 15-26, 2024 in Charleston, South Carolina
Electrical meter billing standards are generally regulated at the state or local level, with guidelines provided by public utility commissions or similar regulatory bodies. These tariff sheets are among the oldest in the world. There are some common standards for billing and metering practices, including:
Meter Types: There are various types of meters used to measure electricity consumption, including analog (mechanical) meters, digital meters, and smart meters. Smart meters are becoming more common and allow for more accurate and real-time billing.
Billing Methodology:
Residential Rates: Most residential customers are billed based on kilowatt-hours (kWh) of electricity used, which is the standard unit of energy.
Demand Charges: Some commercial and industrial customers are also subject to demand charges, which are based on the peak demand (the highest amount of power drawn at any one point during the billing period).
Time-of-Use Rates: Some utilities offer time-of-use (TOU) pricing, where electricity costs vary depending on the time of day or season. For example, electricity may be cheaper during off-peak hours and more expensive during peak hours.
Meter Reading and Billing Cycle:
Monthly Billing: Typically, customers receive a bill once a month, based on the reading of the electricity meter.
Estimation: If a meter reading is not available, some utilities may estimate usage based on historical patterns or average usage.
Smart Meter Readings: With smart meters, some utilities can provide daily or even hourly usage data, leading to more precise billing.
Meter Standards: The standards for electrical meters, including their accuracy and certification, are set by national organizations like the National Institute of Standards and Technology (NIST) and the American National Standards Institute (ANSI). Meters must meet these standards to ensure they are accurate and reliable.
Utility Commission Regulations: Each state has a utility commission (such as the California Public Utilities Commission, the Texas Public Utility Commission, etc.) that regulates the rates and billing practices of electricity providers. These commissions ensure that rates are fair and that utilities follow proper procedures for meter readings, billing cycles, and customer service
Large University “Utilities”. Large colleges and universities that generate and distribute some or all of their electric power consumption have developed practices to distribute the cost of electricity supply to buildings. We will cover comparative utility billing practices in a dedicated colloquium sometime in 2025.
The command issued by the character Captain Jean-Luc Picard in the television series “Star Trek: The Next Generation” finds its way into the archive of photographs of Nobel Laureates consorting with politicians at the University of Michigan and elsewhere.
Attendees of the Theoretical Physics Colloquium at the University of Michigan in 1929.
…”There’s not good math explaining forget the physics of it. Math explaining the behavior of complex systems yeah and that to me is both exciting and paralyzing like we’re at very early days of understanding you know how complicated and fascinating things emerge from simple rules…” — Peter Woit [1:16:00]
Since 1936 the Brown Jug has been the ancestral trough of generations of University of Michigan students and faculty — notably. Donald Glaser (inventor of the bubble chamber) and Samuel C. C. Ting (Nobel Laureate) whose offices at Randall Laboratory were a 2-minute walk around the corner from The Brown Jug. As the lore goes, the inspiration happened whilst watching beer bubbles one ordinary TGIF Friday.
The original University of Michigan codes and standards enterprise advocated actively in Article 708 Critical Operations Power Systems (COPS) of the National Electrical Code (NEC) because of the elevated likelihood that the education facility industry managed assets that were likely candidates for designation critical operations areas by emergency management authorities.
Because the NEC is incorporated by reference into most state and local electrical safety laws, it saw the possibility that some colleges and universities — particularly large research universities with independent power plants, telecommunications systems and large hospitals — would be on the receiving end of an unfunded mandate. Many education facilities are identified by the Federal Emergency Management Association as community storm shelters, for example.
As managers of publicly owned assets, University of Michigan Plant Operations had no objection to rising to the challenge of using publicly owned education facilities for emergency preparedness and disaster recovery operations; only that meeting the power system reliability requirements to the emergency management command centers would likely cost more than anyone imagined — especially at the University Hospital and the Public Safety Department facilities. Budgets would have to be prepared to make critical operations power systems (COPS) resistant to fire and flood damages; for example.
Collaboration with the Institute of Electrical and Electronic Engineers Industrial Applications Society began shortly after the release of the 2007 NEC. Engineering studies were undertaken, papers were published (see links below) and the inspiration for the IEEE Education & Healthcare Facilities Committee developed to provide a gathering place for power, telecommunication and energy professionals to discover and promulgate leading practice. That committee is now formally a part of IEEE and collaborates with IAS/PES JTCC assigned the task of harmonizing NFPA and IEEE electrical safety and sustainability consensus documents (codes, standards, guidelines and recommended practices.
The 2023 Edition of the National Electrical Code does not contain revisions that affect #TotalCostofOwnership — only refinement of wiring installation practices when COPS are built integral to an existing building that will likely raise cost. There are several dissenting comments to this effect and they all dissent because of cost. Familiar battles over overcurrent coordination persist.
Our papers and proposals regarding Article 708 track a concern for power system reliability — and the lack of power — as an inherent safety hazard. These proposals are routinely rejected by incumbent stakeholders on NEC technical panels who do not agree that lack of power is a safety hazard. Even if lack of power is not a safety hazard, reliability requirements do not belong in an electrical wiring installation code developed largely by electricians and fire safety inspectors. The IEEE Education & Healthcare Facilities Committee (IEEE E&H) maintains a database on campus power outages; similar to the database used by the IEEE 1366 committees that develop reliability indices to enlighten public utility reliability regulations.
Public input on the 2026 revision to the NEC will be received until September 7th. We have reserved a workspace for our priorities in the link below:
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
