15. The nomenclature of a building wiring system is divided into two principal parts according to function as
follows: (a) building feeders and subfeeders, and (b) branches or branch circuits. (para 3-21,a, b)
16. Figure 3-32 shows several symbols for electrical fixtures. (a) is a single receptacle outlet, (b) is a single floor
outlet, (c) is a fluorescent light fixture, and (d) represents a wall outlet for a light. (para 3-22,b) (fig 3-32)
17. The incoming service line symbol, shown leading to the circuit breaker panels at the bottom of the plan,
indicates three #8 service lines. (para 3-23,a) (fig 3-33)
18. Circuit A4 consists of eight lights on the right-hand bank of the storeroom. Electrical notes specify that, unless
otherwise noted on plan, all lamps are to be 100 watts. Therefore, total load on circuit A4 is (8 lamps) x (100
watts per lamp) = 800 watts. (para 3-23,a) (fig -33)
19. All circuits connected to circuit breaker "A" are labeled "A" and the number of the circuit follows the letter.
Circuit "A6" is the highest number in the "A" category; therefore, six circuits are connected. (para 3-23,a) (fig
3-33)
20. The double arrowhead is the symbol for the branch circuit home run to panel board as shown in figure 3-31. It
means that no connections are made between this point and the breaker panel. Correct reply is none. (para 3-
27,a) (fig 3-31, 3-33)
240
Previous Page
