Figure 2-9.—Detail B indicated in figure 2-8.

Another type of plot plan can be seen in figure 2-8. Figure 2-8, view A, shows five buildings that are to be supplied with electricity for power and lighting. An electrical layout has been superimposed on the plot plan General notes (fig. 2-8, view B), one detail (fig. 2-8, view C), and section A-A (fig. 2-8, view D) of that detail are shown The dotted line at the bottom of the page indicates underground ducts containing previously laid cable. The design engineer has decided to tap the cable at manhole 22 and run lines overhead to dead-end at the rear of building 126. Figure 2-8, view C, shows that lines are to be run underground from manhole 22 to the first pole crossarms. At building 126, lines are to be carried down the pole, regathered through a pothead into the conduit again, and run underground to a concrete slab, and out through another pothead to a transformer bank. Where do you get this information? Refer to figure 2-9. Figure 2-9 shows detail B is indicated in figure 2-8, view A. This represents the installation behind building 126 where the overhead line terminates. The last pole in the system is shown in the lower left comer. From the pole to the transformer bank, the underground conduit is indicated by dotted lines. The conduit runs underground to the concrete slab on which the transformers rest. Section A-A gives construction details of the slab. FLOOR PLANS.—Imagine that you want to know the outline of a building, including each partition. Figure 2-9.—Detail B indicated in figure 2-8. 2-21