Witches; Brew Incantation | Macbeth, Act 4, Scene 1
First Witch
Round about the cauldron go;
In the poison’d entrails throw.
Toad, that under cold stone
Days and nights has thirty-one
Swelter’d venom sleeping got,
Boil thou first i’ the charmed pot.
ALL
Double, double toil and trouble;
Fire burn, and cauldron bubble.
Second Witch
Fillet of a fenny snake,
In the cauldron boil and bake;
Eye of newt and toe of frog,
Wool of bat and tongue of dog,
Adder’s fork and blind-worm’s sting,
Lizard’s leg and owlet’s wing,
For a charm of powerful trouble,
Like a hell-broth boil and bubble.
ALL
Double, double toil and trouble;
Fire burn and cauldron bubble.
Third Witch
Scale of dragon, tooth of wolf,
Witches’ mummy, maw and gulf
Of the ravin’d salt-sea shark,
Root of hemlock digg’d i’ the dark,
Liver of blaspheming Jew,
Gall of goat, and slips of yew
Silver’d in the moon’s eclipse,
Nose of Turk and Tartar’s lips,
Finger of birth-strangled babe
Ditch-deliver’d by a drab,
Make the gruel thick and slab:
Add thereto a tiger’s chaudron,
For the ingredients of our cauldron.
ALL
Double, double toil and trouble;
Fire burn and cauldron bubble.
#BrockU is applying to @TIPS_SPIIE Canada Excellence Research Chairs program with the goal of securing a #CERC in Sustainable Agriculture for Grape & Wine. Global scholars interested in leading Brock’s CERC team are encouraged to apply. Learn more ➡️ https://t.co/vUlVaymFs8pic.twitter.com/pOAMTILIS6
“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:
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:
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:
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.
These Guidelines cover fossil-fueled power plants, gas-turbine power plants operating in combined cycle, and a balance-of-plant portion including interface with the steam supply system of nuclear power plants. They include performance monitoring concepts, a description of various methods available, and means for evaluating particular applications.
Since the original publication of these Guidelines in 1993—then limited to steam power plants—the field of performance monitoring (PM) has gained considerable importance. The lifetime of plant equipment has been improved, while economic demands have increased to extend it even further by careful monitoring. The PM techniques themselves have also been transformed, largely by the emergence of electronic data acquisition as the dominant method of obtaining the necessary information.
These Guidelines present:
• “Fundamental Considerations”—of PM essentials prior to the actual application, so you enter fully appraised of all the requirements, potential benefits and likelihood of tradeoffs of the PM program.
• “Program Implementation”—where the concepts of PM implementation, diagnostics and cycle interrelationships have been brought into closer conjunction, bringing you up-to-date with contemporary practice.
• “Case Studies / Diagnostic Examples”—from the large amount of experience and historical data that has been accumulated since 1993.
Intended for employees of power plants and engineers involved with all aspects of power production.
From ANSI’s PINS registry:
Project Need: This document is being developed in order to address performance monitoring and optimization techniques for different power generating facilities. The latest trends and initiatives in performance monitoring as well as practical case studies and examples will be incorporated.
Stakeholders: Designers, producers/manufacturers, owners, operators, consultants, users, general interest, laboratories, regulatory/government, and distributors.
This document will cover power generation facilities including steam generators, steam turbines, and steam turbine cycles (including balance of plant of nuclear facilities), gas turbines, and combined cycles. The guidelines include performance monitoring concepts, a description of various methods available, and means for evaluating particular applications.
No drafts open for public consultation at this time. The PINS announcement was placed on October 11th*. The PINS registry is a stakeholder mapping platform that identifies the beginning of a formal process that may interest other accredited, competitor standards developers. Many ASME consensus products may be indirectly referenced in design guidelines and construction contracts with the statement “Conform to all applicable codes”
The landing page for the ASME standards development enterprise is linked below:
Note that you will need to set up a (free) account to access this and other ASME best practice titles.
We maintain all ASME consensus products on the standing agenda of our periodic Mechanical and Energy teleconferences. See our CALENDAR for the next online meeting; open to everyone.
Best practice literature to be covered in our 11 AM session today are listed below. These codes and standards ensure safety, reliability, and compliance for underground electrical and telecommunications installations:
Relevance: The NEC, published by the National Fire Protection Association, is the primary standard for safe electrical installations in the U.S. Articles 300 (Wiring Methods), 310 (Conductors for General Wiring), and 230 (Services) cover underground wiring, including burial depths, conduit requirements, and direct-burial cables like Type UF and USE-2. For example, NEC 300.5 specifies minimum cover depths (e.g., 24 inches for direct-burial cables, 18 inches for PVC conduit).
Key Aspects: Rules for conductor protection, grounding, GFCI requirements, and conduit types (e.g., Schedule 80 PVC). Adopted by most U.S. jurisdictions with local amendments.
ANSI/TIA-568 Series (Commercial Building Telecommunications Cabling Standards)
Relevance: Governs low-voltage telecommunications cabling, including underground installations. TIA-568.2-D (Balanced Twisted-Pair) and TIA-568.3-D (Optical Fiber) specify performance requirements for cables like Cat6 and fiber optics, including maximum distances (e.g., 100 meters for twisted-pair).
Key Aspects: Ensures signal integrity, proper separation from high-voltage lines, and compliance for plenum or direct-burial-rated cables. Voluntary unless mandated by local codes.
IEEE 835 (Standard Power Cable Ampacity Tables)
Relevance: Provides ampacity ratings for underground power cables, critical for sizing conductors to prevent overheating.
Key Aspects: Includes data for direct-burial and ducted installations, considering soil thermal resistivity and ambient conditions. Often referenced alongside NEC for high-current applications.
UL 83 (Standard for Thermoplastic-Insulated Wires and Cables)
Relevance: Underwriters Laboratories standard for wires like THWN-2, commonly used in underground conduits. Ensures cables meet safety and performance criteria for wet locations.
Key Aspects: Specifies insulation durability, temperature ratings, and suitability for direct burial or conduit use. NEC requires UL-listed cables for compliance.
OSHA 1910.305 (Wiring Methods, Components, and Equipment)
Relevance: U.S. Occupational Safety and Health Administration standard for workplace electrical safety, including underground installations in industrial settings.
Key Aspects: Specifies approved wiring methods (e.g., armored cable, conduit) and enclosure requirements for underground cable trays or boxes. Focuses on worker safety during installation and maintenance.
CSA C22.1 (Canadian Electrical Code)
Relevance: Canada’s equivalent to the NEC, governing underground electrical installations. Similar to NEC but tailored to Canadian conditions and regulations.
Key Aspects: Defines burial depths, conduit types, and grounding requirements. For example, low-voltage cables (<30V) require 6-inch burial depth, like NEC.
Notes:
Regional Variations: Always consult local building authorities, as codes like the NEC or AS/NZS 3000 may have amendments. For example, some U.S. states reduce burial depths for GFCI-protected circuits (NEC 300.5).
Low-Voltage vs. High-Voltage: Standards like TIA-568 and ISO/IEC 11801 focus on low-voltage (e.g., <50V) telecommunications, while NEC and IEC 60364 cover both power and telecom.
Practical Compliance: Before installation, call 811 (U.S.) or equivalent to locate underground utilities, and obtain permits/inspections as required by local codes.
Critical Examination: While these standards are authoritative, they can lag behind technological advancements (e.g., new cable types like GameChanger exceeding TIA-568 limits). Over-reliance on minimum requirements may limit performance for cutting-edge applications.
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.
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:
Call us biased, but we have the best group of future occupational therapists in @CSU_OT 💚💛
Last week’s convocation, where we welcomed our cohorts of OT Rams back to campus, was filled with good vibes and high energy for the year ahead 🐏⚡️ pic.twitter.com/8wTJ2rPi8S
Open agenda; Not Too Organized. Whatever anyone wants to talk about. We do meet once a month like this. Use the login credentials at the upper right of our home page.
We explain changes to our syllabus given that five conferences we attend will happen mid-September through mid-November: ANSI (Washington, DC), IEC (Edinburgh, Scotland), NFPA (Redondo Beach, California) and IEEE (Long Beach, California). Mike will be out of the office with sporadic availability. The front desk will be open. Sanne Clare will take phone calls September 27 through October 6.
Help us celebrate our 30th anniversary! We’ve put together a digital guestbook where you can share your reflections on what the Code Council & its mission have meant to you, your organization, & your stakeholders. Leave a note & read what others have said: https://t.co/ooln0FbBfvpic.twitter.com/Q8SmloOaqP
Time is running out! Don’t miss your chance to learn about groundbreaking ideas and implementation strategies shaping the future of Automotive Ethernet. Secure your spot today: https://t.co/L606mFiI7kpic.twitter.com/1Q8Q2vKkaL
— IEEE Standards Association | IEEE SA (@IEEESA) October 6, 2024
New methodology for classifying “The Midwest” – Menards.
Menards stores only appear where a significant number consider themselves “Midwestern.” In the core, indisputably Midwest states, Menards is bigger than Lowes or Home Depot.
Interested in academic awards and teaching resources? A student looking for a discounted ASTM membership? An ASTM member interested in supporting students and other early career professionals? Come to our workshop on ASTM’s Academic Outreach Program, held virtually Nov 7th at… pic.twitter.com/Nom0r3UoHV
University of Michigan – Bell Telephone Laboratories – Massachusetts Institute of Technology
Abstract. A method is developed for representing any communication system geometrically. Messages and the corresponding signals are points in two “function spaces,” and the modulation process is a mapping of one space into the other. Using this representation, a number of results in communication theory are deduced concerning expansion and compression of bandwidth and the threshold effect. Formulas are found for the maximum rate of transmission of binary digits over a system when the signal is perturbed by various types of noise. Some of the properties of “ideal” systems which transmit at this maxmum rate are discussed. The equivalent number of binary digits per second for certain information sources is calculated.
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