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Life Safety Code

Educational and Day-Care Occupancies (July 23, 2025 Second Draft Transcript)

The Life Safety Code addresses those construction, protection, and occupancy features necessary to minimize danger to life from the effects of fire, including smoke, heat, and toxic gases created during a fire.   It is widely incorporated by reference into public safety statutes; typically coupled with the consensus products of the International Code Council.   It is a mighty document — one of the NFPA’s leading titles — so we deal with it in pieces; consulting it for decisions to be made for the following:

(1) Determination of the occupancy classification in Chapters 12 through 42.

(2) Determination of whether a building or structure is new or existing.

(3) Determination of the occupant load.

(4) Determination of the hazard of contents.

There are emergent issues — such as active shooter response, integration of life and fire safety systems on the internet of small things — and recurrent issues such as excessive rehabilitation and conformity criteria and the ever-expanding requirements for sprinklers and portable fire extinguishers with which to reckon.  It is never easy telling a safety professional paid to make a market for his product or service that it is impossible to be alive and safe.  It is even harder telling the dean of a department how much it will cost to bring the square-footage under his stewardship up to the current code.

The 2021 edition is the current edition and is accessible below:

NFPA 101 Life Safety Code Free Public Access

Public input on the 2027 Revision will be received until June 4, 2024.  Public comment on the Second Draft 2027 Revision will be received until March 31, 2026.

 

Since the Life Safety Code is one of the most “living” of living documents — the International Building Code and the National Electric Code also move continuously — we can start anywhere and anytime and still make meaningful contributions to it.   We have been advocating in this document since the 2003 edition in which we submitted proposals for changes such as:

• A student residence facility life safety crosswalk between NFPA 101 and the International Building Code

• Refinements to Chapters 14 and 15 covering education facilities (with particular attention to door technologies)

• Identification of an ingress path for rescue and recovery personnel toward electric service equipment installations.

• Risk-informed requirement for installation of grab bars in bathing areas

• Modification of the 90-minute emergency lighting requirements rule for small buildings and for fixed interval testing

• Modification of emergency illumination fixed interval testing

• Table 7.3.1 Occupant Load revisions

• Harmonization of egress path width with European building codes

There are others.  It is typically difficult to make changes to stabilized standard though some of the concepts were integrated by the committee into other parts of the NFPA 101 in unexpected, though productive, ways.  Example transcripts of proposed 2023 revisions to the education facility chapter is linked below:

Chapter 14 Public Input Report: New Educational Occupancies

Educational and Day Care Occupancies: Second Draft Public Comments with Responses Report

Since NFPA 101 is so vast in its implications we list a few of the sections we track, and can drill into further, according to client interest:

Chapter 3: Definitions

Chapter 7: Means of Egress

Chapter 12: New Assembly Occupancies

Chapter 13: Existing Assembly Occupancies

Chapter 16 Public Input Report: New Day-Care Facilities

Chapter 17 Public Input Report: Existing Day Care Facilities

Chapter 18 Public Input Report: New Health Care Facilities

Chapter 19 Public Input Report: Existing Health Care Facilities

Chapter 28: Public Input Report: New Hotels and Dormitories

Chapter 29: Public Input Report: Existing Hotels and Dormitories

Chapter 43: Building Rehabilitation

Annex A: Explanatory Material

As always we encourage front-line staff, facility managers, subject matter experts and trade associations to participate directly in the NFPA code development process (CLICK HERE to get started)

NFPA 101 is a cross-cutting title so we maintain it on the agenda of our several colloquia —Housing, Prometheus, Security and Pathways colloquia.  See our CALENDAR for the next online meeting; open to everyone.

 

Issue: [18-90]

Category: Fire Safety, Public Safety

Colleagues: Mike Anthony, Josh Elvove, Joe DeRosier, Marcelo Hirschler

More

ARCHIVE / Life Safety Code 2003 – 2018

 

Fire and Life Safety in Stadiums

2029 National Electrical Code Panel 3

The University of Michigan has supported the voice of the United States education facility industry since 1993 — the second longest tenure of any voice in the United States.  That voice has survived several organizational changes but remains intact and will continue its Safer-Simpler-Lower Cost-Longer Lasting advocacy on Code Panel 3 in the 2029 Edition.

Today, during our customary “Open Door” teleconference we will examine the technical concepts under the purview of Code Panel 3; among them:

Article 206 Signaling Circuits

Article 300 General Requirements for Wiring Methods and Materials

Article 590 Temporary Installations

Chapter 7 Specific Conditions for Information Technology

Chapter 9 Conductor Properties Tables

Public Input on the 2029 Edition will be received until April 9, 2026.

 

Code ignis MMXXVII

Winter Holiday Fire Facts

NFPA Fire Protection Systems Catalog (Lorem ipsum)

Crosswalk: NFPA Fire Code and ICC International Fire Code

“Prometheus creating Man in the presence of Athena” 1802 Jean-Simon Berthélemy

Free public access to the current edition of NFPA’s parent fire safety document is linked below:

2024 NFPA 1 Fire Code 

We attend to occupancy-specific chapters (listed below) because of their significant presence in education communities.

Chapter 25: Grandstands and Bleachers, Folding and Telescopic Seating, Tents and Membrane Structures (N.B)

Chapter 26: Laboratories Using Chemicals

Chapter 29: Parking Garages

Chapter 32: Motion Picture and Television Production Studio Soundstages and Approved Production Facilities

Chapter 35: Animal Housing Facilities

Chapter 36: Telecommunication Facilities and Information Technology Equipment

Chapter 50: Commercial Cooking

Chapter 52: Energy Storage Systems

Some of the chapters reference other titles such as NFPA 45 Standard of Fire Protection for Laboratories Using Chemicals which support risk management in other occupancies.  It is noteworthy that in the 2021 revision cycle of NFPA 1 there are relatively few new concepts regarding education facilities that have been proposed.   You get a sampling of the ideas in play from the transcript of public input for the 2024 edition.

Public Input Report (525 Pages)

Use search terms such as school, college, university, dormitory(ies), laboratory(ies), classroom, children, day-care, student, et cetera for a sense of the ideas in play.

Results of the 2027 First Draft meetings have not yet been posted as on November 9, 2024.  A preview of the ideas in play can be found in the meeting minutes of the several committees linked below:

Fire Code (FCC-AAC): First Draft Meeting Minutes

First Draft: Fundamentals of the Fire Code (FCC-FUN)

Special Equipment, Processes and Hazardous Materials (FCC-HAZ)

Building Systems and Special Occupancies (FCC-OCP)

Public comment on the First Draft of the 2027 revision will be received until April 24, 2025.

We include NFPA 1 on our periodic fire safety colloquia — identified by the mnemonic Prometheus — and march along peak interests.

Campus fire safety is domain relatively well-covered by other organizations such as the Center for Campus Fire Safety and HigherEd Safety so we place NFPA 1 in the middle of our priority tier.   We are more interested in the harmonization of NFPA 1 with a competitor title International Fire Code; published by the International Code Council; to wit:

International Fire Code:   The purpose of this code is to establish the minimum requirements consistent with nationally recognized good practice for proving a reasonable level of life safety and property protection from the hazards of fire, explosion or dangerous conditions in new and existing buildings, structures or premises and to provide a reasonable level of safety to fire fighters and emergency responders during emergency operations

Fire Code: The scope includes, but is not limited to, the following: (1) Inspection of permanent and temporary buildings, processes, equipment, systems, and other fire and related life safety situations (2) Investigation of fires, explosions, hazardous materials incidents, and other related emergency incidents (3) Review of construction plans, drawings, and specifications for life safety systems, fire protection systems, access, water supplies, processes, hazardous materials, and other fire and life safety issues (4) Fire and life safety education of fire brigades, employees, responsible parties, and the general public (5) Existing occupancies and conditions, the design and construction of new buildings, remodeling of existing buildings, and additions to existing buildings (6) Design, installation, alteration, modification, construction, maintenance, repairs, servicing, and testing of fire protection systems and equipment (7) Installation, use, storage, and handling of medical gas systems (8) Access requirements for fire department operations (9) Hazards from outside fires in vegetation, trash, building debris, and other materials (10) Regulation and control of special events including, but not limited to, assemblage of people, exhibits, trade shows, amusement parks, haunted houses, outdoor events, and other similar special temporary and permanent occupancies (11) Interior finish, decorations, furnishings, and other combustibles that contribute to fire spread, fire load, and smoke production (12) Storage, use, processing, handling, and on-site transportation of flammable and combustible gases, liquids, and solids (13) Storage, use, processing, handling, and on-site transportation of hazardous materials (14) Control of emergency operations and scenes (15) Conditions affecting fire fighter safety (16) Arrangement, design, construction, and alteration of new and existing means of egress

Note that both ICC and NFPA parent fire safety documents are developed on coincident 3-year cycles.

 

Issue: [18-90]

Category: Fire Safety, Public Safety

Colleagues: Mike Anthony,  Joshua W. Elvove, Joe DeRosier, Casey Grant

Interconnected Electric Power Production Sources “Microgrids”

“Landscape with a Farm House and Windmill” (1680) / Jacob Isaaksz van Ruisdael

We have always taken a forward-looking approach to the National Electrical Code (NEC) because there is sufficient supply of NEC instructors and inspectors and not enough subject matter experts driving user-interest ideas into it.  Today we approach the parts of the 2023 NEC that cover wiring safety for microgrid systems; a relatively new term of art that appropriates safety and sustainability concepts that have existed in electrotechnology energy systems for decades.

Turn to Part II of Article 705 Interconnected Electric Power Production Sources:

Free Access 2023 National Electrical Code

You will notice that microgrid wiring safety is a relatively small part of the much larger Article 705 Content.   There were relatively minor changes to the 2017 NEC in Section 705.50  — but a great deal of new content regarding Microgrid Interconnection Devices, load side connections, backfeeding practice and disconnecting means — as can be seen in the transcripts of Code-Making Panel 4 action last cycle:

Code‐Making Panel 4 Public Input Report (692 Pages)

Code-Making Panel 4 Public Comment Report (352 Pages)

Keep in mind that the NEC says nothing (or nearly very little, in its purpose stated in Section 90.2) about microgrid economics or the life cycle cost of any other electrical installation.  It is the claim about economic advantages of microgrids that drive education facility asset management and energy conservation units to conceive, finance, install, operate and — most of all — tell the world about them.

In previous posts we have done our level best to reduce the expectations of business and finance leaders of dramatic net energy savings with microgrids — especially on campuses with district energy systems.  Microgrids do, however, provide a power security advantage during major regional contingencies — but that advantage involves a different set of numbers.

Note also that there is no user-interest from the education facility industry — the largest non-residential building construction market in the the United States — on Panel 4.   This is not the fault of the NFPA, as we explain in our ABOUT.

The 2023 NEC was released late last year.

 

The 2026 revision cycle is in full swing with public comment on the First Draft receivable until August 24, 2024.  Let’s start formulating our ideas using the 2023 CMP-4 transcripts.   The link below contains a record of work on the 2023 NEC:

2026 National Electrical Code Workspace

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 other IEEE professional societies.

Mike Anthony’s father-in-law and son maintaining the electrical interactive system installed in the windmill that provides electricity to drive a pump that keeps the canal water at an appropriate level on the family farm near Leeuwarden, The Netherlands.

Issue: [19-151]

Category: Electrical, Energy

Colleagues: Mike Anthony, Jim Harvey, Kane Howard, Jose Meijer

Archive / Microgrids

 

Campus Electric Bulk Distribution

Today we will also cut through these transcripts:

2026 Code Panel 6 Public Input Report

2026 Code Panel 6 Public Comment Report

College and university campuses distribute electric energy in tranches of 10 to 250 megawatts; typically at voltages above 1000 VAC and are generally regarded as load-side services (or regulated utility customers). Two fairly stable sections of the National Electrical Code set the standard of care for these systems — Part III of Article 110 and Article 495.

We will examine them during today’s High Voltage Electric Service colloquium.

FREE ACCESS: 2023 National Electrical Code

We collaborate closely with the IEEE Education & Healthcare Facilities Committee which meets online 4 times per month in European and American time zones.  Ahead of the August 2024 public comment deadline we will examine transcripts of technical action on this topic:

2026 National Electrical Code Workspace

Cultural Resource Properties

Public Input on the 2029 Edition will be received until January 6, 2027

Comments on the Second Draft of NFPA 909 — Cultural Resource Property Protection — will be received until 3 October 2024

University of Chicago

 

 

Books cannot be killed by fire.  People die, but books never die

No man and no force can put thought in a concentration camp forever

— Franklin Roosevelt

 

Many education communities build and maintain cultural resource properties whose safety and sustainability objectives are informed by local adaptations of consensus products developed by the International Code Council (ICC) and the National Fire Protection Association (NFPA).   We need to understand the ICC and NFPA product suites as a pair.   For most real assets in the education industry  they move “roughly” in tandem even though they are produced by different organizations for a different set of customers.  Sometimes the out-of-step condition between NFPA and ICC permits subject matter experts on technical committees to make the best possible decisions regarding the safety and sustainability agenda of the interest group they represent; but not always.

Occupancy classification is always a first consideration and both the NFPA and the ICC have a claim to some part of this occupancy concept*.   In the ICC suite we find code requirements for many “cultural places of worship” tracking in the following sections of the International Building Code (IBC):

Section 303 Assembly Group A-3

Section 305 Educational Group E

Section 308 Institutional Group I

Note that Sections 305 and 308 recognize the accessory and multi-functional nature of occupancy types in the education industry – i.e child care and adult care function can marge and be an accessory to a place of worship.  The general rule in the IBC is that accessory religious educational rooms and religious auditoriums with occupant loads of less than 100 per room or space are not considered separate occupancies.    Other standards developers are guided by this rule.

"The only thing you absolutely have to know is the location of the library" - Albert Einstein

Close coupled to the IBC for this occupancy class is NFPA 909 Code for the Protection of Cultural Resource Properties – Museums, Libraries, and Places of Worship.  From the document prospectus:

• This code describes principles and practices of protection for cultural resource properties (including, but not limited to, museums, libraries, and places of worship), their contents, and collections, against conditions or physical situations with the potential to cause damage or loss.

• This code covers ongoing operations and rehabilitation and acknowledges the need to preserve culturally significant and character-defining building features and sensitive, often irreplaceable, collections and to provide continuity of operations.

• Principles and practices for life safety in cultural resource properties are outside the scope of this code. Where this code includes provisions for maintaining means of egress and controlling occupant load, it is to facilitate the evacuation of items of cultural significance, allow access for damage limitation teams in an emergency, and prevent damage to collections through overcrowding or as an unintended consequence of an emergency evacuation.

• Library and museum collections that are privately owned and not open to the public shall not be required to meet the requirements of this code.

"The only thing you absolutely have to know is the location of the library" - Albert Einstein

Since we are hard upon release of the 2021 Edition of NFPA 909 let us take a backward look at the current (2017) version of NFPA 909 Code for the Protection of Cultural Resource Properties – Museums, Libraries, and Places of Worship.  Chapter 14 covers “Museums, Libraries and their Collections”.   Chapter 15 covers “Places of Worship”

Free Access Edition NFPA 909

The 2025 Edition is now open for public input.  Let us pick through proposals for the 2021 Edition to inform our approach to its improvement by referencing the technical committee transcripts linked below:

Public Input Report: January 12, 2023

N.B. We find committee response (accepted in principle) to Standards Michigan proposal to articulate conditions in which places of worship and libraries are used as community disaster relief support facilities.  We consider this a modest “code win”.

Circling back to the ICC suite we find elevated interest in hardening community owned facilities to tornadoes, hurricane and floods and other storm related risk in the structural engineering chapters of the International Building Code.

"This We'll Defend."

NFPA 909: Code for the Protection of Cultural Resource Properties – Museums, Libraries, and Places of Worship | 2021 Edition

Leadership and facility managers for enterprises of this type are encouraged to contribute obtain their own (free) NFPA public participation account in order to directly participate in the 2025 revision of NFPA 909 by logging in here: https://www.nfpa.org/login.

Public consultation on the First Draft of the 2025 Edition closes January 4, 2024.

This document is also a standing item on our periodic Prometheus, Lively and Fine Arts teleconference.  See our CALENDAR for the next online meeting; open to everyone.

Issue: [15-258]

Category: Fire Safety, Public Safety

Colleagues: Mike Anthony, Josh Elvove, Joe DeRosier

*See NFPA 101 Life Safety Code

Labeling of Hazardous Art Materials Act

Property Loss Prevention

LEARN MORE:

Guidelines for the Security of Rare Books, Manuscripts, and Other Special Collections, Association of College & Research Libraries, American Library Association, 50 East Huron Street, Chicago, IL 60611-2795.

“A Legal Primer on Managing Museum Collections,” Malaro, Marie, second edition 1998

“Risk and Insurance Management Manual for Libraries,” Mary Breighner and William Payton, edited by Jeanne Drewes, ALA 2005 ISBN 0-8389-8325-1.

Wisconsin Historic Building Code, Madison, WI:Wisconsin Administrative Code.

 

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

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

Installation of Air-Conditioning and Ventilating Systems

Design, construction, operation and maintenance of environmental air, piping and drainage systems is one of the largest cost centers in education facilities.  We find subtle tradeoffs between fire safety, energy conservation and indoor air quality goals.   With solid data and enlightened debate which include the user-interest (the final fiduciary in the education facility industry, for example) those tradeoffs are reconciled by technical committees administered by three ANSI-accredited standards developers:

American Society of Heating and Refrigeration Engineers (ASHRAE)

American Society of Mechanical Engineers (ASME)

IAPMO Group (IAPMO)

National Fire Protection Association (NFPA)

Sheet Metal & Air Conditioning Contractors National Association

Today we focus on the leading safety practice of NFPA 90A Standard for the Installation of Air-Conditioning and Ventilating Systems.  From the NFPA 90A prospectus:

[NFPA 90A] shall cover construction, installation, operation, and maintenance of systems for air conditioning and ventilating, including filters, ducts, and related equipment, to protect life and property from fire, smoke, and gases resulting from fire or from conditions having manifestations similar to fire.

[Explanation A.1.1] An air duct system has the potential to convey smoke, hot gases, and flame from area to area and to supply air to aid combustion in the fire area. For these reasons, fire protection of an air duct system is essential to safety to life and the protection of property. However, an air duct system’s fire integrity also enables it to be used as part of a building’s fire protection system. Guidance for the design of smoke-control systems is provided in NFPA 92, Standard for Smoke Control Systems. Pertinent information on maintenance is provided in Annex B. Maintenance of fire dampers, ceiling dampers, smoke dampers, and combination fire/smoke dampers requirements can be found in NFPA 80, Standard for Fire Doors and Other Opening Protectives, and NFPA 105, Standard for Smoke Door Assemblies and Other Opening Protectives.

The original University of Michigan codes and standards advocacy enterprise spoke loud and clear about duct smoke detector application, control signaling and maintenance requirements from the user point of view.   Owing to the re-organization we missed the 2018 revision but we are now recovering from where we left off for the 2021 revision.

The First Draft Report for the 2021 edition is linked below:

First Draft Ballot / Final Results

90A_A2020_AIC_AAA_SD_PCResponses

NFPA 90A is heavily referenced in an interlocking matrix of related fire safety consensus products but it is not very lengthy document.   We include it on the standing agenda of our periodic Mechanical and Prometheus Bound teleconference.  See our CALENDAR for the next online meeting.

 

Issue: [13-118]

Category: Fire Protection, Mechanical

Colleagues: Mike Anthony, Richard Robben, Larry Spielvogel

:

 

Branch and Feeder Circuit Design

FREE ACCESS 2026 National Electrical Code

Branch circuits relevant to modular classroom buildings are primarily addressed in Article 120: Branch Circuits (formerly Article 210 in previous editions). This article covers requirements for branch-circuit sizing, overcurrent protection, outlets, and general installation rules for circuits up to 1000 volts AC or 1500 volts DC.  Key sections include:120.19: Conductor sizing and derating.

120.20: Overcurrent protection.
120.21: Receptacle outlets and tamper-resistant requirements.
120.23: Specific rules for appliances and fixed equipment.

For outside branch circuits, see Article 267: Outside Branch Circuits and Feeders over 1000 Volts AC or 1500 Volts DC, Nominal (if applicable to higher voltages).Feeder Circuit RulesFeeder circuits are primarily addressed in Article 121: Feeders (formerly Article 215 in previous editions). This article details feeder conductor sizing, grounding, and disconnecting means for circuits supplying branch circuits or sub-feeders up to 1000 volts AC or 1500 volts DC.Key sections include:121.2: Minimum rating and sizing.

121.3: Overcurrent protection.
121.4: Feeders as branch circuits (when applicable).

Outside feeders are covered in Article 267: Outside Branch Circuits and Feeders over 1000 Volts AC or 1500 Volts DC, Nominal (for higher voltages) or cross-referenced in Article 267 for general outside installations.

For modular school buildings detached from the main building with pre-installed single or three phase wiring systems, designers must choose between a separate service drop from a merchant utility or tapping into an existing source from the nearby school building.

Compact Muon Solenoid / European Organization for Nuclear Research

Modular classroom buildings, often prefabricated and portable, require special attention in electrical power design to ensure safety, compliance, and functionality. The 2026 National Electrical Code (NEC) emphasizes proper sizing of branch circuits (Article 120) and feeders (Article 121) based on load calculations (Article 122), accounting for lighting, HVAC, and technology demands. Designers must consider temporary or relocatable installations, ensuring grounding and bonding comply with Article 250 for safety. Flexible wiring methods, like cord-and-plug connections, may be needed for portability, per Article 400. Modular units often face environmental challenges, requiring weather-resistant materials and equipment (Article 110). Surge protection (Article 285) is critical to safeguard sensitive classroom electronics. Accessibility for maintenance and inspections, per Article 110.26, is vital due to compact designs. Finally, compliance with local codes and coordination with utility connections ensure reliable power delivery for educational environments.

 

 

We have tried for several cycles to change the “Type of Occupancy” listing in NEC Table 220.12 to reflect more granular definition for School/university and Sports arena lighting load calculations. We will have another chance in the 2026 NEC. [Public input is due September 10th]

  • Public Input Closing Date: September 7, 2023

 

 

4 February 2021

 

 

 

Let’s start marking up the 2023 National Electrical Code, shall we?   We will collaborate with IEEE Standards Coordinating Committee 18 — the committee that follows NFPA electrical safety consensus products and coordinates the response of IEEE electrical power professionals.

A good place to start is with the transcripts of the 2020 revision — AVAILABLE  HERE for free.   We look for proposals that failed for one reason or another; holding fast to our hunch that changes to the ampere load requirements that appear in the prescriptive statements to designers and inspectors of Chapter 2 could changed.   The 2020 transcripts of Code-Making Panel 4 are linked below:

Code‐Making Panel 2 Public Input Report (991 Pages)

Code-Making Panel 2 Public Comment Report (402 Pages)

We have been trying for several NEC revision cycles to change the “Type of Occupancy” tabulations of Table 220.12 to reflect more granular definition in the Volt/Ampere requirement of 33 VA/m2 (3 VA/ft2) for School/university and Sports arena.   Some of the problem in Table 220.12 regarding electrical loads in education facilities lies in its foundation built upon the International Building Code; the remainder of the problem lies with the education facility industry itself; described in detail in our ABOUT.

The good news is that the NFPA Fire Protection Research Foundation (FPRF) recognizes the problem and is acting on it; described in previous posts and in its project portfolio.  Keep in mind that Standards Michigan, the original voice of the user-interest for education facility industry in the global standards system, has to compete with other, competitor stakeholders who make their market in this and in other consensus products accredited by the American National Standards Institute.

Public input for the 2023 National Electrical Code is due September 10th.    We will collaborate with the FPRF and the IEEE Education & Healthcare Facilities Committee, and others, to get informed public input to Code-Making Panel 2 and the NEC Technical Correlating Committee.   See our CALENDAR for our next Electrical & Telecommunication teleconference, open to everyone.

Issue: [19-201]

Category: Electrical

Colleagues: Mike Anthony, Scott Gibb, Jim Harvey, Kane Howard, Paul Kempf, Philip Ling, Jose Meijer

 

LEARN MORE:

IEEE Industrial Applications Society: The safety and economic benefit of reduced power design densities permitted in the 2014 National Electrical Code (Anthony, Ling, Meijer)

 

 

Fire Protection Research Institute | Evaluation of Electrical Feeder and Branch Circuit Loading

Originally posted October 16, 2016

University of Michigan Law School

With thanks to Richard Robben, President of True North Facility Management, the pledges to fund the NFPA Fire Protection Foundation Project: Evaluation of Electrical Feeder and Branch Circuit Loading accumulated to the requisite $24,000 to begin Phase I of two phases of a project originally begun by the University of Michigan to bring the National Electrical Code (NFPA 70) in line with federal energy conservation regulations that incorporate by reference the International Energy Conservation Code.   

NFPA 70 is one of the most widely used standards for electrotechnology in the world.   The University of Michigan began assertive advocacy on behalf of the US education industry in the NFPA suite in 1996 and that advocacy has expanded globally under two different private organizations: See About

Phase I is now completed.   The Phase I Final Report (with public comments) is available in the links below:

REPORT – Branch Circuit Loading Phase1 FINAL

SUMM – Panel Comments – Branch Circuit Loading FINAL2

In October, the project Principal Researcher, Tammy Gammon, provided an update to the NFPA Research Foundation.  Her slides are available in the link below:

NFPA Fire Protection Research Institute | Feeder & Branch Circuit Loading Evaluation | Phase I Update

 

We wish to thank our colleagues at Notre Dame who helped “get the ball rolling”, our colleagues in the Big Ten & Friends consortia, and forward-thinking manufacturers for their pledges:

Eaton Corporation

MIAPPA | Michigan Association of Physical Plant Administrators

Michigan State University

Ohio State University

University of Iowa

University of Minnesota

University of Nebraska

University of Texas Austin

 

Issue [13-33]

Contact: Mike Anthony, Jim Harvey, Richard Robben (True North, LLC); Tom Harman (University of Houston Clearwater), Kane Howard (Michigan State University), Paul Kempf (Notre Dame)

Colleagues: Robert G. Arno (Harris Corp), Joe Weber (Emerson), Casey Grant (NFPA), Larry Ayers (Independent Electrical Contractors Association)

Category: Electrical, Energy Conservation

 

 

 

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