Calculated Industries 5025 - Manual (Page 37)

User's Guide — 35
Finding Voltage Drop Distance
How far from a single-phase 240-volt
source can you install a 15 amp load
using 60°C #10 Al branch circuit con-
ductors? Assume a 3% allowable volt-
age drop.
Steps Keystrokes Display
Reset calculator [Set] [x] 0.
Set to single ph. [Set] 1 1 PH
Set to aluminum [CU/AL] 1Ø 60 Al 1 PH
Enter amps 15 [Amps] 15. AMPS
Enter volts 240 [Volts] 240. VOLT
Enter wire size 10 [WireSz] 10. AL
AWG WIRE SIZE
Enter 3% VD 3 [VD%] 3. DROP V %
Find distance [Length] 123.77387 FEET
Find actual
voltage drop
[VD%] 7.2 DROP V
Find % v.drop [VD%] 3.0 DROP V
NOTE: The calculator automatically
makes adjustments for resistance using
NEC Chap 9, Table 8, if the insulation
type is other than 75°C.