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ELECTRICAL DIVISION - 14071_85
HEATING   SYSTEM - 14071_87

Engineering Aid 2 - Intermediate Structural engineering guide book
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Figure 4-3.—Example of a power-riser diagram. A simple example is the power-riser diagram shown in figure 4-3. In this example, you see the manner in which two electrical panels (L1 and L2) are planned for installation  in  a  two-story  building.  As  you  see,  notes are used to identify each piece of equipment and to indicate the number, size, and type of conductors in each conduit.  A  panelboard  schedule  for  each  of  the  panels should also be included in the drawings to indicate the components, such as fuses or circuit breakers, contained in the each panelboard. A  schematic  wiring  diagram  is  similar  to  the single-line block diagram; however, it provides more detailed information and the actual number of wires used  in  each  circuit  is  shown.  Complete  schematic wiring  diagrams  are  usually  used  for  unique  and complicated  systems,  such  as  control  circuits.  An example of a schematic diagram is shown in figure 4-4. FIRE PROTECTION DIVISION This  division  includes  the  plans,  details,  and schedules  that  describe  the  fire  protection  systems  that are  to  be  installed  in  the  building.  These  systems  can include, as applicable, wet-pipe or dry-pipe sprinkler systems,  monitoring  equipment,  and  alarms.  A discussion of these systems is beyond the scope of this TRAMAN. Figure 4-4.—Example of a schematic diagram HVAC SYSTEMS AND DRAWINGS Although  it’s  the  engineers  responsibility  to  design heating, ventilating, and air-conditioning systems, the drafter  who  prepares  drawings  of  the  systems  should have a basic understanding of the operating principles of each. Those principles, and a typical heating and air conditioning layout for a building, are discussed in the 4-4







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