Tag Archives: D6

Loading
loading..

Stray Voltage: Sources and Solutions

Michigan State University

 

Stray Voltage: Sources and Solutions

Truman C. Surbrook – Norman D. Reese – Angela M. Kehrle

 

Abstract.  Stray voltage is caused by voltage drop and ground faults and may have its origin on the primary electrical distribution system or on the customer’s secondary electrical system. The rms value of the neutral-to-earth voltage along a primary distribution line may be at a value of zero some distance from the substation depending on the condition of the conductor resistances, grounding resistances, and the amount of load. Neutral-to-earth resistance is not the cause of stray voltage; however, the value of this resistance to earth at a particular location will affect the level of stray voltage. A four-wire single-phase feeder system supplying farm buildings from a single metering point is effective in preventing on-farm secondary neutral voltage drop, provided the four-wire system is extended to all farm loads, and provided no high-magnitude ground faults are present. Isolation of the primary and secondary neutral systems at the distribution transformer is effective in preventing off-farm sources from entering the customer’s system. This separation may be accomplished using a number of commercially available devices.

CLICK HERE for access to the entire paper

International Zoning Code

2025 Group B Proposed Changes to IZC | Complete Monograph for Changes to I-Codes (2630 pages)

National Association of County Engineers

The purpose of the code is to establish minimum requirements to provide a reasonable level of health, safety, property protection and welfare by controlling the design, location, use or occupancy of all buildings and structures through the regulated and orderly development of land and land uses within this jurisdiction.

CLICK IMAGE

Municipalities usually have specific land use or zoning considerations to accommodate the unique needs and characteristics of college towns:

  1. Mixed-Use Zoning: Cities with colleges and universities often employ mixed-use zoning strategies to encourage a vibrant and diverse urban environment. This zoning approach allows for a combination of residential, commercial, and institutional uses within the same area, fostering a sense of community and facilitating interactions between students, faculty, and residents.
  2. Height and Density Restrictions: Due to the presence of educational institutions, cities may have specific regulations on building height and density to ensure compatibility with the surrounding neighborhoods and maintain the character of the area. These restrictions help balance the need for development with the preservation of the existing urban fabric.
  3. Student Housing: Cities with colleges and universities may have regulations or guidelines for student housing to ensure an adequate supply of affordable and safe accommodations for students. This can
    include requirements for minimum bedroom sizes, occupancy limits, and proximity to campus.
  4. Parking and Transportation: Given the concentration of students, faculty, and staff, parking and transportation considerations are crucial. Cities may require educational institutions to provide parking facilities or implement transportation demand management strategies, such as promoting public transit use, cycling infrastructure, and pedestrian-friendly designs.
  5. Community Engagement: Some cities encourage colleges and universities to engage with the local community through formalized agreements or community benefit plans. These may include commitments to support local businesses, contribute to neighborhood improvement projects, or provide educational and cultural resources to residents.

This is a relatively new title in the International Code Council catalog; revised every three years in the Group B tranche of titles.  Search on character strings such as “zoning” in the link below reveals the ideas that ran through the current revision:

Complete Monograph: 2022 Proposed Changes to Group B I-Codes (1971 pages)

We maintain it on our periodic I-Codes colloquia, open to everyone.  Proposals for the 2026 revision will be received until January 10, 2025.

2024/2025/2026 ICC CODE DEVELOPMENT SCHEDULE

We maintain it on our periodic I-Codes colloquia, open to everyone with the login credentials at the upper right of our home page.

The City Rises (La città che sale) | 1910 Umberto Boccioni


Related:

“What Happens When Data Centers Come to Town”

Signs, Signs, Signs

  1. Reed v. Town of Gilbert (2015): This Supreme Court case involved a challenge to the town of Gilbert, Arizona’s sign code, which regulated the size, location, and duration of signs based on their content. The court held that the sign code was a content-based restriction on speech and therefore subject to strict scrutiny.
  2. City of Ladue v. Gilleo (1994): In this Supreme Court case, the court struck down a municipal ordinance that banned the display of signs on residential property, except for signs that fell within specific exemptions. The court held that the ban was an unconstitutional restriction on the freedom of speech.
  3. Metromedia, Inc. v. San Diego (1981): This Supreme Court case involved a challenge to a San Diego ordinance that banned off-premises advertising signs while allowing on-premises signs. The court held that the ordinance was an unconstitutional restriction on free speech, as it discriminated against certain types of speech.
  4. City of Ladue v. Center for the Study of Responsive Law, Inc. (1980): In this Supreme Court case, the court upheld a municipal ordinance that prohibited the display of signs on public property, but only if the signs were posted for longer than 10 days. The court held that the ordinance was a valid time, place, and manner restriction on speech.
  5. City of Boerne v. Flores (1997): This Supreme Court case involved a challenge to a municipal sign code that regulated the size, location, and content of signs in the city. The court held that the sign code violated the Religious Freedom Restoration Act, as it burdened the exercise of religion without a compelling government interest.

 

LIVE: KAFA 97.7 FM | THE ACADEMY

Broadcast Club • United States Air Force Academy

 

Fish and Chips and the British Working Class

“Fish and Chips” | Fred Laidler (1918–1988)

Fish and Chips and the British Working Class, 1870-1930

Fish and chips was in many ways the pioneer fast-food industry.  It became an essential component of working-class diet and popular culture in parts of London, and over wide areas of industrial midland and northern England and southern Scotland, in the early decades of the twentieth century…I propose to argue that the fish and chip trade was not only important enough in itself to justify sustained historical analysis, but also that it provides a useful vantage point for examining important changes in British society more generally.”

— John Walken, 1998, Journal of Social History


Animal Safety

“One of the Family” 1880 | Frederick George Cotman

NFPA 150 Fire and Life Safety in Animal Housing Facilities Code has entered its s025 revision cycle.   Many education communities are responsible for animal safety in academic units, research enterprises. museums and even — as in the United Kingdom — large farm animals that wander freely on campus with students, faculty and staff.  The number of colleges and universities that permit students to live with their pets has expanded; and with it the responsibilities of university administration.

From the document scope:

This standard shall provide the minimum requirements for the design, construction, fire protection, and classification of animal housing facilities.  The requirements of NFPA 150 recognize the following fundamental principles:

(1) Animals are sentient beings with a value greater than that of simple property.

(2) Animals, both domesticated and feral, lack the ability of self-preservation when housed in buildings and other structures.

(3) Current building, fire, and life safety codes do not address the life safety of the animal occupants. The requirements found in NFPA 150 are written with the intention that animal housing facilities will continue to be designed, constructed, and maintained in accordance with the applicable building, fire, and life safety codes.

The requirements herein are not intended to replace or rewrite the basic requirements for the human occupants. Instead, NFPA 150 provides additional minimum requirements for the protection of the animal occupants and the human occupants who interact with those animals in these facilities. 

 

A full description of the project is linked below:

Fire and Life Safety in Animal Housing Facilities Code

Access to the 2025 Edition is linked below:

FREE ACCESS NFPA 150

We provide the transcript of the back-and-forth on the current 2022 edition to inform how education communities can contribute to the improvement of this title; a subject that stirs deep feelings about animal safety in research enterprises.

NFPA 150 First Draft Agenda

NFPA 150 Second Draft Report

Public comment on the Second Draft of the 2025 Edition will be received until March 27, 2024.   

We have been advocating risk-informed animal safety concepts in this document since the 2013 Edition and have found that it is nearly impossible to overestimate the sensitivity of educational communities to the life safety of animals — either for agriculture or medical research.

We maintain the entire NFPA catalog on the standing agenda of our Prometheus colloquia.  See our CALENDAR for the next online meeting; open to everyone.

"i thank You God for most this amazing day:for the leaping greenly spirits of trees and a blue true dream of sky;and for everything which is natural which is infinite which is yes" -- e.e.cummings ('Seventy-One Poems' 1950)

 

Issue: [11-1] and [19-5]

Category: Fire Protection, Facility Asset Management, Academic, Risk Management

Colleagues: Mike Anthony, Josh Elvove, Joe DeRosier

More:

Protecting Animals When Disaster Strikes

Animals 300


 


Bibliography:

25 Most Pet-Friendly Colleges

National Institute of Health: Policy on Humane Care and Use of Laboratory Animals

International Building Code: Section 304 (Business Group B): Animal hospitals, kennels and pounds

Terrestrial Animal Health Code

IEEE Guide for Animal Deterrents for Electric Power Supply Substations

ASHRAE Animal Facilities

IEEE Livestock Monitoring System

Ventilation Design Handbook on Animal Research Facilities

HVAC Design in Animal Facilities

USDA Animal Welfare Information Center

ISO Assistance Dogs

US Department of Agriculture: Animal Welfare Act and Animal Welfare Regulations

S. 4288: Reducing Animal Testing Act

Guaranteeing safety of animals under risk of fire: conceptual framework and technical issues analysis

Protecting Animals When Disaster Strikes

 

Fireplace Safety


Many accommodations such as dormitories, fraternities and sororities have working fireplaces — wood burning and natural gas.  Community spaces such as student unions, libraries and recreation spaces also have fireplaces as a central feature.

The purpose of NFPA 211 is to reduce fire hazards by discovering and promulgating best practice for the safe removal of flue gases, the proper installation of solid fuel-burning appliances, and the correct construction and installation of chimneys, fireplaces, and venting systems.  The current 2019 Edition is linked below:

Free Access: NFPA 221 Standard for Chimneys, Fireplaces, Vents, and Solid Fuel-Burning Appliances

The 2024 has been released.  To guide our inquiry into safety and sustainability concepts for the 2027 Edition we like review the developmental transcripts of previous edition:

Public Input Report

Second Revisions Report

Public comment on the First Draft of the 2027 Edition will be received until June 3, 2025. 

Public comment on the Second Draft of the 2027 Edition will be received until March 31, 2026. 

We encourage facility managers to recommend improvements to this standard by setting up a (Free) NFPA account the link below:

Online submission of public input and public comments

We maintain this standard on our periodic Prometheus and Housing colloquia.  Consult our CALENDAR for the next online meeting, open to everyone

Link to parent standard:

Code ignis MMXXVII

NFPA 211: Articles and News

University of Rochester Fireplace Safety

American Gas Association: How Natural Gas Fuels Your Holiday Traditions

Natural Gas Transmission & Distribution

 

Winter Birds


Birds in Winter

Layout mode
Predefined Skins
Custom Colors
Choose your skin color
Patterns Background
Images Background
Standards Michigan
error: Content is protected !!
Skip to content