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Figure 2-16.Pole detail for use with the site plan shown in figure 2-15. - 14070_53
Figure 2-18.Transformer pad details for use with the site plan shown in figure 2-15. - 14070_55

Engineering Aid 1 - Advanced Structural engineering guide book
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Figure 2-17.—Cable-trench detail for use with the site plan shown in Figure 2-15. runs  to  three  new  10-ampere  fused  cutouts  before running  to  the  new  cable  terminals  and  lightning arresters. Figure  2-16  also  shows  that  a  new  three-wire shielded cable is connected to the cable terminators and runs down the pole. From the pole, the cable is then  run,  as  shown  in  figure  2-17,  at  a  specified distance  underground  to  the  new  transformer  pad. Figure 2-18 is a detail of the pad that the designer included  in  the  working  drawings  for  the  circuit installation. As you can see, these details leave little doubt  about  the  job  requirements.  However,  other information,  such  as  specified  material  requirements for  the  concrete,  cables,  conduit,  and  so  forth; specified  procedures  for  backfilling  the  trench  and placing   the   concrete;   and   any   other   information necessary to a fill understanding of the material and installation requirements should also be shown on the drawings or in the project specifications. The  preceding  discussions  of  electrical  trans- mission and distribution systems, distribution plans, and electrical details should leave you in a better position to aid  the  engineering  officer  or  other  design  engineers. However, to increase your knowledge and to become even more valuable as an EA, you should further your studies  by  reading  other  publications,  including  the  CE TRAMANs  and  commercial  publications,  such  as  The Lineman’s and Cableman’s Handbook  by Kurtz and Shoemaker. Now let us look at some other utility systems that you will be involved with. WATER SUPPLY AND DISTRIBUTION A water supply system consists of all the facilities, equipment, and piping that are used to obtain, treat, and transport  water  for  a  water  distribution  system.  A distribution  system  is  a  combination  of  connected  pipes that carry the supplied water to the users. In this section, we will discuss water distribution so you will be familiar with the elements of a distribution system and types of information that is required on distribution drawings. First,, however, we will discuss water sources and the need for water treatment. Although it is the engineer’s responsibility  to  select  a  water  source  for  use,  to determine  the  methods  of  developing  the  source,  and  to design the supply and distribution system, you should have a general knowledge of this subject so you, as a technician, will be better able to assist the engineer. WATER SOURCES AND TREATMENT While the Navy prefers to obtain potable water from nearby public sources, it is sometimes not possible to do so. The following text briefly discusses the different types of water sources, source selection and develop ment, and the need for water treatment. Water Sources For most uses, the principal source of water is rain. This source is classified as surface water and ground- water. 2-14







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