Length of wire = 150 feet

Voltage drop = 2 percent maximum

From figure 9, the wire size required is a No. 4

The actual voltage drop using a No. 4 wire is found to be 1.7 percent from

figure 9.

16. Section CI carries the demand load for groups III, IV, and V which is equal

to 8.50 KVA.

Length of section is 300 ft.

Allowed voltage drop is 1%

From figure 9, the required size of wire is a No. 2.

As a check, the actual

voltage drop is found from figure 9 to be 0.96 percent.

17. Load carried by section IL= 6 KVA, length 450 feet, allowed voltage drop =

1.7 percent. From figure 9, lesson 2, attached memorandum, the required wire size

is a No. 4. The actual voltage drop is found to be 1.6 percent.

18. The

table

in

figure

21,

lesson

2,

attached

memorandum,

is

completed

as

follows:

Hence, the total cumulative voltage drop to point N is 6.6 percent. Since this is

in excess of the maximum 6 percent allowed, larger wire will be necessary for

portions of the system.

19.

Integrated Publishing, Inc. |