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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.

Transcripts of 2026 Revision:

Public Input Report CMP-13

Public Comment Report CMP-13

https://t.co/chd9RJVc7G
print(“Disaster”) pic.twitter.com/Lu6Dw3bARq

— Standards Michigan (@StandardsMich) November 15, 2021

The transcript of NEC Code Making Panel 13 — the committee that revises COPS Article 708 every three years — is linked below:

NEC CMP-13 First Draft Balloting

NEC CMP-13 Second Draft Balloting

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:

2026 National Electrical Code Workspace

Colleagues: Robert Arno, Neal Dowling, Jim Harvey

LEARN MORE:

IEEE | Critical Operations Power Systems: Improving Risk Assessment in Emergency Facilities with Reliability Engineering

Consuting-Specifying Engineer | Risk Assessments for Critical Operations Power Systems

Electrical Construction & Maintenance | Critical Operations Power Systems

International City County Management Association | Critical Operations Power Systems: Success of the Imagination

Facilities Manager | Critical Operations Power Systems: The Generator in Your Backyard

Electric Vehicle Power Transfer System

Updated July 15, 2025

2026 National Electrical Code Table of Contents

2026 NEC First Draft: How Did We Get Here?

2026 National Electrical Code

Public Input Transcript: First Draft | Public Comment Transcript: Second Draft

2023 National Electrical Code | Current Issues and Recent Research

2026 National Electrical Code Workspace

~~August 5, 2021~~

The 2020 National Electrical Code (NEC) contains significant revisions to Article 625 Electric Vehicle Power Transfer Systems. Free access to this information is linked below:

2023 National Electrical Code

2020 National Electrical Code

You will need to set up a (free) account to view Article 625 or you may join our colloquium today.

Public input for the 2023 Edition of the NEC has already been received. The work of the assigned committee — Code Making Panel 12 — is linked below:

NFPA 70_A2022_NEC_P12_FD_PIReport_rev

Mighty spirited debate. Wireless charging from in-ground facilities employing magnetic resonance are noteworthy. Other Relevant Articles:

Article 240: Overcurrent Protection: This article includes requirements for overcurrent protection devices that could be relevant for EV charging systems.
Article 210: Branch Circuits: General requirements for branch circuits, which can include circuits dedicated to EVSE.
Article 220: Load Calculations: Guidelines for calculating the electrical load for EVSE installations.
Article 230: Services: General requirements for electrical service installations, which can be relevant for EVSE.
Article 250: Grounding and Bonding: Requirements for grounding and bonding, which are critical for safety in EVSE installations.

Technical committees meet November – January to respond. In the intervening time it is helpful break down the ideas that were in play last cycle. The links below provide the access point:

Public Input Report Panel 12

Public Comment Report Panel 12

Panel 12 Final Ballot

We find a fair amount of administrative and harmonization action; fairly common in any revision cycle. We have taken an interest in a few specific concepts that track in academic research construction industry literature:

Correlation with Underwriters Laboratory product standards
Bi-Directional Charging & Demand Response
Connection to interactive power sources

As a wiring safety installation code — with a large installer and inspection constituency — the NEC is usually the starting point for designing the power chain to electric vehicles. There is close coupling between the NEC and product conformance organizations identified by NIST as Nationally Recognized Testing Laboratories; the subject of a separate post.

Edison electric vehicle | National Park Service, US Department of the Interior

~~After the First Draft is released June 28th public comment is receivable until August 19th.~~

We typically do not duplicate the work of the 10’s of thousands of National Electrical Code instructors who will be fanning out across the nation to host training sessions for electrical professionals whose license requires mandatory continuing education. That space has been a crowded space for decades. Instead we co-host “transcript reading” sessions with the IEEE Education & Healthcare Facilities Committee to sort through specifics of the 2020 NEC and to develop some of the ideas that ran through 2020 proposals but did not make it to final ballot and which we are likely to see on the docket of the 2023 NEC revision. That committee meets online 4 times monthly. We also include Article 625 on the standing agenda of our Mobility colloquium; open to everyone. See our CALENDAR for the next online meeting

Issue: [16-102]

Category: Electrical, Transportation & Parking, Energy

Colleagues: Mike Anthony, Jim Harvey

Workspace / NFPA

More

U.S. NATIONAL ELECTRIC VEHICLE SAFETY STANDARDS SUMMIT | DETROIT, MICHIGAN 2010

Gallery: Electric Vehicle Fire Risk

Lightning Protection Systems

2026 Public Input Report | 2026 Public Comment Report

FEMA National Risk Index: Lightning

“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

FREE ACCESS

To paraphrase the NFPA 780 prospectus:

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.

2023 Public Input Report

2023 Public Comment Report

~~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. 🤓

NC State's brand-new scoreboard shorts out due to lightning storms https://t.co/KWm78nrRau

— DJ (@DJ87112331) September 10, 2023

The "Top engineering school in the state" just built a $15 million scoreboard without a lightning rod.

Wasn't it just last year that their game got delayed because they couldn't turn the lights on? https://t.co/wWt9gSMYIv

— Steele (@0Gstank) September 9, 2023

More

Installing lightning protection system for your facility in 3 Steps (Surge Protection)

IEEE Education & Healthcare Facility Electrotechnology

Readings: The “30-30” Rule for Outdoor Athletic Events Lightning Hazard

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.

Virginia Tech

Solar Panels on King’s College Chapel Roof

“…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.

King’s College Announcement

Solar Panels on King’s College Chapel Roof

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”…

BS 7671 Requirements for Electrical Installations

The Major Differences in Electrical Standards Between the U.S. and Europe

Representative Calculation: (WAG)

To determine how much electrical power and lighting 12 kilowatts (kW) will provide for an educational facility, we need to consider the following factors:

1. 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.
2. Lighting Requirements: The specific lighting requirements per square foot or room, which can vary based on the type of facility (classrooms, libraries, laboratories, etc.).
3. 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.

1. Lighting Efficiency:
  - LED lights are highly efficient, typically around 100 lumens per watt.
  - Fluorescent lights are less efficient, around 60-70 lumens per watt.
2. Lighting Power Calculation:
  - 12 kW (12,000 watts) of LED lighting at 100 lumens per watt would provide:
3. Illumination Requirements:
  - Classroom: Approximately 300-500 lux (lumens per square meter).
  - Library or laboratory: Approximately 500-750 lux.
4. Area Coverage:
  - If we target 500 lux (which is 500 lumens per square meter), we can calculate the area covered by the lighting: (

Now we need to allocate power to other loads.

1. Lighting: Assuming 50% of the 12 kW goes to lighting:
  - Lighting Power: 6 kW (6,000 watts)
  - Using the previous calculation:
  - Area Coverage for lighting (at 500 lux): (
2. 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.

Solar Photovoltaic Energy Systems

Technical Committee 82 of the International Electrotechnical Commission is charged with preparing international standards for the full length of the solar energy power chain The span of the power chain includes the light input, the cell itself, and the fittings and accessories to the end use (utilization) equipment.

Strategic Business Plan of IEC Technical Committee 82

The United States is the Global Secretariat for TC 82 through the US National Committee of the International Electrotechnical Commission (USNA/IEC) administered by the American National Standards Institute(ANSI). Standards Michigan is a long-standing member of ANSI since our “standards journey” began at the University of Michigan in 1993.

The USNA/IEC and participates in its standards development processes; typically collaborating with global research and application engineers in the IEEE Industrial Applications Society and the IEEE Power and Energy Society. To advance its agenda for lower #TotalCostofOwnership for US real asset executives and facility managers Standards Michigan also collaborates closely with subject matter experts who contribute to, and draw from, the knowledge base in the IEEE Education and Healthcare Facilities Committee (E&H).

The IEC permits public commenting on its draft standards; though you will need to establish login credentials:

IEC Public Commenting

Your comments will be reviewed by the IEC National Committee of the country you live in, which can decide to propose them as national input for the final draft of the IEC International Standard. This approach makes it easier for individual nations to participate in IEC standards development processes because the resources that national standards bodies need to administer participation resides in Geneva and is managed there.

“The Eclipse of the Sun in Venice, July 6, 1842” | Ippolito Caffi

We collaborate with the IEEE Education & Healthcare Facilities Committee which has its own platform to tracking commenting opportunities:

IEEE E&H/USNC/IEC Workspace

As of this posting, no interoperability redlines have been released for public consultation. In large measure, IEC titles contribute to a level playing field among multi-national electrical equipment manufacturers so we should not be surprised that there are no redlines to review. When they are released we place them on the agenda of the IEEE E&H Committee which meets 4 times monthly in European and American time zones.

Log in to the E&H Committee meeting

Issue: [18-240]

Category: Electrical Power, Energy Conservation

Contact: Mike Anthony, Jim Harvey, Peter Sutherland

LEARN MORE:

[1] US Commenters must route their comments through the USNA/IEC.

[2] Many product and installation standards are developed by the Association of Electrical Equipment and Medical Imaging Manufacturers (NEMA): CLICK HERE

[3] NEMA comparison of NEC and IEC electrical safety standards

Dutch Institute for Fundamental Energy Research

Solarvoltaic PV Systems

“Icarus” Joos de Momper

National Electrical Code Articles 690 and 691 provide electrical installation requirements for Owner solarvoltaic PV systems that fall under local electrical safety regulations. Access to the 2023 Edition is linked below;

2023 National Electrical Code

2026 National Electrical Code Second Draft Transcript | CMP-4

Insight into the technical problems managed in the 2023 edition can be seen in the developmental transcripts linked below:

Panel 4 Public Input Report (869 pages)

Panel 4 Second Draft Comment Report (199 pages)

The IEEE Joint IAS/PES (Industrial Applications Society & Power and Energy Society) has one vote on this 21-member committee; the only pure “User-Interest” we describe in our ABOUT. All other voting representatives on this committee represent market incumbents or are proxies for market incumbents; also described in our ABOUT.

The 2026 National Electrical Code has entered its revision cycle. Public input is due September 7th.

We maintain these articles, and all other articles related to “renewable” energy, on the standing agenda of our Power and Solar colloquia which anyone may join with the login credentials at the upper right of our home page. We work close coupled with the IEEE Education & Healthcare Facilities Committee which meets 4 times monthly in American and European time zones; also open to everyone.

Solar Panel Recycling

Institute of Electrical and Electronic Engineers:

The value of diversity in the renewable energy industry and research community

Comparing the carbon footprint of monocrystalline silicon solar modules manufactured in China and the United States

Material Requirement and Resource Availability for Silicon Photovoltaic Laminate Manufacturing in the Next 10 Years

Life cycle assessment of transparent organic photovoltaic for window applications

Evaluating the Electricity Production and Energy Saving from Transparent Photovoltaics for Windows in Commercial Buildings

Designing Lighting for People and Buildings

IES Standards Open for Public Review

Standard Practice on Lighting for Educational Facilities

IES Method for Determining Correlated Color Temperature

Sport Lighting

“Electrical Building World’s Columbian Exposition Chicago 1892

Today we feature the catalog of the Illumination Engineering Society — one of the first names in standards-setting in illumination technology, globally* with particular interest in its leading title IES LP-1 | LIGHT + DESIGN Lighting Practice: Designing Quality Lighting for People and Buildings.

From its prospectus:

“…LIGHT + DESIGN was developed to introduce architects, lighting designers, design engineers, interior designers, and other lighting professionals to the principles of quality lighting design. These principles; related to visual performance, energy, and economics; and aesthetics; can be applied to a wide range of interior and exterior spaces to aid designers in providing high-quality lighting to their projects.

Stakeholders: Architects, interior designers, lighting practitioners, building owners/operators, engineers, the general public, luminaire manufacturers. This standard focuses on design principles and defines key technical terms and includes technical background to aid understanding for the designer as well as the client about the quality of the lighted environment. Quality lighting enhances our ability to see and interpret the world around us, supporting our sense of well-being, and improving our capability to communicate with each other….”

The entire catalog is linked below:

IES Lighting Library

Illumination technologies run about 30 percent of the energy load in a building and require significant human resources at the workpoint — facility managers, shop foremen, front-line operations and maintenance personnel, design engineers and sustainability specialists. The IES has one of the easier platforms for user-interest participation:

IES Standards Open for Public Review

Because the number of electrotechnology standards run in the thousands and are in continual motion* we need an estimate of user-interest in any title before we formally request a redline because the cost of obtaining one in time to make meaningful contributions will run into hundreds of US dollars; apart from the cost of obtaining a current copy.

We maintain the IES catalog on the standing agendas of our Electrical, Illumination and Energy colloquia. Additionally, we collaborate with experts active in the IEEE Education & Healthcare Facilities Committee which meets online 4 times monthly in European and American time zones; all colloquia online and open to everyone. Use the login credentials at the upper right of our home page to join us.

University of Toronto night canada facebook timeline 1929 719

Late_night_SFSU_quad night San Francisco State University

st joseph university night winterish 1923 721

Champlain College vermont fall facebook summer or spring cover night 1921 720

University of Alaska Fairbanks facebook timeline northern lights 1922 721

University_of_Utah_Hospital_in_2009 1921 721 featured twlight

valdosta state university facebook cover spring summer twilight 1921 719

Issue: [Various}

Category: Electrical, Energy, Illumination, Facility Asset Management

Colleagues: Mike Anthony, Gary Fox, Jim Harvey, Kane Howard, Glenn Keates, Daleep Mohla, Giuseppe Parise, Georges Zissis

* “Brownian Motion” comes to mind because of the speed and interdependencies.

“Season of Light Illumination”

LEARN MORE:

Illuminating Engineering Society Welcomes New Director of Development
Shayna Bramley Brings 21 years of Lighting Industry Experience to IES

To learn more, to go: https://t.co/YApdTPvR8E pic.twitter.com/PGDCtO4jrC

— Illuminating Engineering Society (@The_IES) December 26, 2018

The LD+A editorial and sales team members just couldn’t resist visiting Bugsy and Meyer’s Steakhouse (covered in the December 2021 issue) while in Las Vegas for LightFair! Read up on the details of the shadowy project here: https://t.co/7eoLPT69Dx #TheIES #LightFair2022 #lighting pic.twitter.com/uWmolsNpMz

— Illuminating Engineering Society (@The_IES) June 22, 2022

Energy Standard for Sites & Buildings: Lighting

University of Michigan

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:

READ ONLY Version of 2022 ASHRAE 90.1

If you cannot access it with the link above, try the link below and select 90.1 from the title list:

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:

25 January 2023: Newly Released ASHRAE 90.1-2022 Includes Expanded Scope For Building Sites

At this time, there are no redlines open for public comment

Online Standards Actions & Public Review Drafts

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

Under Construction: ASHRAE WORKSPACE

More:

Consulting-Specifying Engineer (March 4, 2025): Why and how to adopt the IECC for energy-efficient designs

US Department of Energy Codes Program: Power and Lighting

Rightsizing Electrical Power Systems

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.

Tag Archives: D2

Storm Shelters

Critical Operations Power Systems

Electric Vehicle Power Transfer System

Lightning Protection Systems

Solar Panels on King’s College Chapel Roof

Solar Photovoltaic Energy Systems

Solarvoltaic PV Systems

Solar Panel Recycling

Designing Lighting for People and Buildings

Energy Standard for Sites & Buildings: Lighting

DIRECTIONS