U.S. Army Corps of Engineers
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ULC Purple Book Course Description PrintPrint this page  EmailE-mail this page
Control Number: 90 Course Number: 35ESC01A
Length: 36 Delivery: Tuition: $2315.00
CEUs: 3.3     PDHs: 33.0     LUs: 0.0     PDUs: 0.0     CMs: 0.0     CLPs: 0.0     CEHs: 0.0
This course presents an overview of the basic rules for the design, construction and maintenance of electrical substations, grounding, switchyards, overhead and underground power and communication lines, and coordination. It provides a sound basis for understanding the intent of the National Electrical Safety Code (NESC), applies the code in practical situations, and presents the Corps' policy and guidance, as documented in technical manuals and guide specifications. AT/FP requirements are also discussed. In order to receive the most benefits from this topic it is strongly recommended that the student have a working knowledge in the interpretation of time vs. current characteristic curve plots or have attended course Electrical Design I.
(a) INTRODUCTION: This segment presents the Technical Manuals and United Facilities Guide Specifications (UFGS) applicable to exterior design. The development, structure and application of the NESC are also presented in this introductory session. The responsibilities of utility system operators are stressed in the discussion of rules covering the purpose, scope, application and intent of the code. A general discussion of electrical loss versus equipment costs will illustrate why different voltage levels should be used for different applications. (b) GROUNDING: This portion addresses the fundamentals of grounding: to include earth grounding, protective equipment operation, the flow of current to the electrode and its transfer to the earth, and electrode effectiveness. The grounding rules portion covers: the grounding conductor's point of connection, grounding conductor properties, the means of connection, grounding electrodes, methods of connection, and ground resistance. The allowed connections between grounding conductors and electrodes serving low-voltage, secondary circuits and those serving high-voltage, distribution lines and equipment are discussed. (c) ELECTRIC SUPPLY STATIONS: This segment presents equipment arrangements in substations including enclosing equipment and selecting equipment. The requirements for protective grounding, the guarding of live parts, and providing working space around live equipment are also emphasized. (d) DESIGN, CONSTRUCTION, AND MAINTENANCE OF OVERHEAD ELECTRIC SUPPLY LINES: This portion addresses the design and construction of equipment, grounding, clearances, strength and loading. NESC fundamental concepts and requirements are explained and discussed in detail. Students discuss design/construction information. (e) DESIGN, CONSTRUCTION, AND MAINTENANCE OF UNDERGROUND DISTRIBUTION SUPPLY LINES: Emphasis is placed on conduit design/construction, supply cable requirements, direct buried cables, risers and terminations, equipment concerns, and tunnels. (f) POWER SYSTEM PROTECTION AND COORDINATION: This segment identifies the nature of short circuits and short-circuit protection philosophy. Protective device coordination will be discussed using sample problems. (g) FACILITY DESIGN: This session develops a detailed design of a facility including connections to the power station, overhead/underground wiring system, transformers, service equipment, meters, grounding, and protection systems.
Nominees must be assigned (a) Occupational Series: 0850, and 0855. Those in 0801 series or equivalent electrical professions who have an electrical background may also attend. Nominees should be electrical or electronic engineers or have electrical engineering responsibilities with a basic knowledge of the design and/or construction and maintenance of substations, switchyards, and overhead and underground power.
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