CHAPTER 2CONSTRUCTION METHODS AND MATERIALS:ELECTRICAL AND MECHANICAL SYSTEMSThe responsibility for the design of electrical andmechanical systems rests with the engineering officer.However, as an EA assisting the engineering officer, youshould be familiar with the methods, materials, andterminology used in the design and construction of thesesystems. This chapter provides that familiarity.This chapter expands on the EA3 TRAMAN discus-sion of exterior electrical distribution systems. You shouldfind it helpful to review chapter 9 of that TRAMANbefore beginning the study of the following text.This chapter also discusses water distribution andsewage collection systems that are exterior to buildings.You will find that some of the materials and terminologyused in the design and construction of these systems arethe same as those used for building plumbing.Therefore, you also should find it helpful to reviewchapter 8 of Engineering Aid 3.ELECTRICAL POWER SYSTEMOverall, an electrical power system includes theelectrical lines, or circuits, and all of the associatedequipment that are necessary to supply power from ageneration point to the users of the supplied power.Generally, the power system is considered to consist oftwo parts: the transmission system and the distributionsystem. Figure 2-1 shows a typical electrical powerFigure 2-1.—Typical electrical power system.2-1
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