46 — ElectriCalc Pro
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] [On/C]
0.
Set to 1-phase
[Set] [1]
1 PH
Set to aluminum
[Set] [4]
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%]
3.0 DROP V %
Find distance
[Length]
123.77387 FEET
Find actual
voltage drop
[VD%]
7.2 DROP AL V
Find % v.drop
[VD%]
3.0 DROP AL V %
NOTE: The calculator automatically
makes adjustments for resistance using
NEC Chap 9, Table 8, if the insulation
type is other than 75°C.
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